Abrégé

A self-checking-based fire-fighting air intake and discharge control system, which is applied to measure a combustible gas in an energy storage container (40). The fire-fighting air intake and discharge control system comprises: a gas measurement module (11), which is used for measuring the concentration of a combustible gas in an energy storage container (40); an air intake and discharge module (12), which is used for controlling the circulation of the gas in the energy storage container (40); and a control module (10), which is used for controlling the operation of the gas measurement module (11) and the operation of the air intake and discharge module (12), and controlling, when the concentration of the combustible gas exceeds a preset concentration threshold value, the air intake and discharge module (12) to discharge the combustible gas. The fire-fighting air intake and discharge control system can automatically detect a fault problem of the system and feed back same in a timely manner, and can also measure multiple environmental factors; and the system regularly performs self-checking, and stores and uploads data, and an operation and maintenance person can retrieve operation data, predetermines an on-site operation situation, and maintains the system and a device.

Classes IPC  ?

• G05B 19/042 - Commande à programme autre que la commande numérique, c.à d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques

Abrégé

The present application discloses a buck-boost converter and a power supply system. The converter comprises a controller, a controllable switching transistor, a freewheeling diode and a boost circuit. A first terminal and a second terminal of the controllable switching transistor are respectively connected to the positive input terminal of the buck-boost converter and the positive input terminal of the boost circuit. The anode and the cathode of the freewheeling diode are respectively connected to the negative input terminal of the buck-boost converter and the second terminal of the controllable switching transistor. The controller is used for controlling the buck-boost converter to work in a buck mode when the input voltage of the buck-boost converter is greater than a preset voltage, and controlling the buck-boost converter to work in a boost mode when the input voltage of the buck-boost converter is smaller than the preset voltage. Due to the existence of the freewheeling diode in the boost circuit, when the direct-current input terminal is short-circuited, the freewheeling diode in the boost circuit bears reverse voltage blocking, so as to avoid short circuiting of the output terminal of the buck-boost converter, thereby protecting the buck-boost converter.

Classes IPC  ?

• H02M 3/155 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle
• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
• H02M 7/44 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques
• H02J 7/35 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p.ex. batterie tampon avec des cellules sensibles à la lumière

Abrégé

The present application provides a loss-balanced modulation method for ANPC topology and a converter. The loss-balanced modulation method for ANPC topology comprises: after determining a positive half cycle and a negative half cycle of an alternating-current (AC) side voltage of the ANPC topology, for the same half cycles, an inner tube and an outer tube of a corresponding half bridge arm in the ANPC topology alternately performing turn-off actions so as to achieve a corresponding zero-level output state. On and off times of the inner tube and the outer tube are enabled to be similar, so that switching loss of the inner tube and the outer tube can be shared, and the inner tube and the outer tube are alternately turned on and off, so that loss balance between the inner and outer tubes can be implemented.

Classes IPC  ?

• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle

Abrégé

Disclosed in the present application are a power converter and an automatic dust cleaning method. The power converter comprises a power semiconductor device, a heat sink, a fan and a controller, wherein the heat sink comprises a heat sink substrate and a heat sink fin; the power semiconductor device is fitted on the heat sink substrate; an air inlet mesh, the fan, the heat sink and an air outlet mesh are sequentially arranged in a box body of the power converter; air ducts are formed between the fan and the heat sink and between the heat sink and the air outlet mesh; and the controller is configured to control, when the power converter is in a non-grid-connected state, the fan to run backwards for self-cleaning of the power converter. Since the present application implements, when the power converter is in the non-grid-connected state, control over the fan for self-cleaning of the power converter, normal operation of the power converter is not affected, such that the operating efficiency of the power converter is not reduced.

Classes IPC  ?

• H02M 7/42 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité

Abrégé

A cabinet assembly of an energy storage apparatus, and an energy storage apparatus having same. The cabinet assembly (1) comprises a body (40), a first wiring assembly (10), a second wiring assembly (20), and a third wiring space. A first chamber and a second chamber are provided in the body (40); the first wiring assembly (10) is fixed to an inner wall of the body (40), a first wiring space is provided in the first wiring assembly (10), the first wiring space is provided with a first wiring hole (15) located in the first chamber, and a fire-fighting cable is adapted to be electrically connected to a fire-fighting device through the first wiring hole (15); the second wiring assembly (20) is fixed to the inner wall of the body (40), and the second wiring assembly (20) is internally provided with a second wiring space for guiding wiring of a communication cable which is electrically connected to a battery; and the third wiring space is located in the second chamber, each of the first wiring space and the second wiring space is in communication with the third wiring space, and each of the fire-fighting cable and the communication cable is electrically connected to an electrical element. The cabinet body assembly can achieve threading hiding of an exposed wire, such that the overall wire arrangement is simpler, and the risk caused by faults of the exposed wire is avoided.

Classes IPC  ?

• H02B 1/32 - Montage de dispositifs à l'intérieur de ces enveloppes
• H02B 1/20 - Schémas de barres omnibus ou d'autres fileries, p.ex. dans des armoires, dans les stations de commutation

Abrégé

Provided in the present application are a control method and control circuit for a bidirectional resonant direct-current converter. According to the control method, after it is detected that a secondary-side resonant current is commutated, corresponding switch tubes in bridge arms of a secondary-side circuit are controlled to respectively delay for a corresponding period of time and then switch off. After the switch tubes are switched off, the current is commutated to anti-parallel diodes or body diodes of complementary switch tubes in the same bridge arms, and therefore, after a corresponding dead time elapses, the complementary switch tubes in the bridge arms of the secondary-side circuit are controlled to turn on, such that each switch tube in the secondary-side circuit has, only in the dead time, an operation condition where a drive is not turned on and thus the current flows reversely. In this way, the turn-on loss is reduced. Moreover, since each delay time is determined according to an input electrical parameter and/or an output electrical parameter of the bidirectional resonant direct-current converter and a required gain, the required gain can also be realized when a switching frequency is set to be greater than a resonant frequency. Therefore, a frequency adjustment range of a wide-voltage output occasion can be reduced, which has an obvious effect for improving the switching frequency.

Classes IPC  ?

• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 7/219 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs dans une configuration en pont
• H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont
• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation

Abrégé

Provided in the present application are a control method and control circuit for a bidirectional resonant direct-current converter. In the control method, when the reversal of a secondary side resonant current is detected, corresponding switch tubes in a secondary side circuit are controlled to delay for a period of time before being switched off, which is different from the case in the conventional synchronous rectification technology where switching off is performed before reversal, such that it is possible to prevent anti-parallel diodes of these switch tubes from being switched on at a moment close to a zero crossing moment, thus avoiding the problems such as low-frequency oscillation caused when a switch tube having an anti-parallel diode with poor reverse recovery characteristic, such as a silicon MOSFET, is used as a rectifier tube; moreover, after switching off, the current is commutated to an anti-parallel diode or a body diode of a complementary switch tube in the same arm, i.e., commutated to an anti-parallel diode or a body diode of a switch tube that needs to be switched on in a half cycle, such that after the dead time, controlling these switch tubes needing to be switched on to be switched on can realize zero-voltage switching-on of the switch tubes.

Classes IPC  ?

• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 7/219 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs dans une configuration en pont
• H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont
• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle
• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation

Abrégé

The present application discloses a power supply control protection system and a control protection method. The system comprises: a switching power supply, a main controller, an auxiliary controller, a sampling circuit and an energy storage element, wherein the switching power supply is used for supplying power to the sampling circuit, the main controller and the auxiliary controller; the energy storage element is used for providing an auxiliary power supply for the sampling circuit, the main controller and the auxiliary controller; the sampling circuit has a self-checking function and sends a self-checking result to at least one of the main controller and the auxiliary controller; when the self-checking result indicates that the sampling circuit is normal, the main controller or the auxiliary controller controls a converter to work; and the main controller and the auxiliary controller communicate with each other. When a switching power supply cannot normally supply power, an energy storage element supplies power to a controller and a sampling circuit, such that the normal sampling and control reliability of a power supply system is ensured, thereby ensuring that a fault isolation circuit can reliably operate. The sampling circuit has a self-checking function, such that faults of the sampling circuit are found in a timely manner, and thus it is not necessary to provide two sampling circuits, thereby saving on the cost.

Classes IPC  ?

• H02H 7/00 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan
• H02H 7/20 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour équipement électronique
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

The present application discloses a photovoltaic system and a control method. The photovoltaic system comprises at least two photovoltaic strings, a power acquisition loop, a trip switch, a switch mode power supply, and a controller. The at least two photovoltaic strings are connected in series or in parallel; the trip switch is connected between the photovoltaic strings and an input end of a converter; the power acquisition loop is used for acquiring power from at least one photovoltaic string and supplying power to the switch mode power supply; the switch mode power supply is used for supplying power to the controller and the trip switch when the power acquisition loop supplies power normally; and the controller is used for controlling, when a wiring fault occurs to the at least two photovoltaic strings connected in parallel, the trip switch to be switched off. The power acquisition loop is specially provided, and the power acquisition loop can directly acquire power from the photovoltaic strings and supply power to the switch mode power supply. When the photovoltaic strings connected to the power acquisition loop are reversely connected, the switch mode power supply does not work, and the trip switch is not switched off, so that the reversely connected photovoltaic strings are not burnt out.

Classes IPC  ?

• H02H 11/00 - Circuits de protection de sécurité pour empêcher la commutation de mise en service dans le cas où une condition électrique de travail indésirable pourrait en résulter

Abrégé

Disclosed in the present application are a flying capacitor three-level DC-DC converter, a photovoltaic system and a control method. The flying capacitor three-level DC-DC converter comprises: an inductor, a first switch tube, a second switch tube, a first diode, a second diode, a third diode, a flying capacitor and a controller. When the difference between the voltage of a direct-current bus and the voltage of the flying capacitor is greater than or equal to the withstand voltage of the second diode, the controller controls the DC-DC converter not to operate, so as to reduce the voltage of the direct-current bus. When the voltage of the direct-current bus is extra high or a pre-charge voltage of the flying capacitor is extra low, the DC-DC converter operates, and thus the second diode bears an extra-high voltage and is easily damaged. Therefore, by means of reducing the voltage of the direct-current bus, the voltage of the flying capacitor Cf is synchronously raised by means of charging until the difference between the voltage of the direct-current bus and the voltage of the flying capacitor is less than the withstand voltage of the second diode, and then the DC-DC converter operates, such that the safety of the second diode can be ensured.

Classes IPC  ?

• H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle
• H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present application discloses a combiner device, a photovoltaic system and a fault detection method. The combiner device comprises at least two photovoltaic strings connected in parallel; and further comprises a current measurement circuit, a voltage measurement circuit, an insulation resistance measurement circuit and a controller. The current measurement circuit is used for measuring the current of each photovoltaic string; the voltage measurement circuit is used for measuring the voltage of the photovoltaic strings connected in parallel; the insulation resistance measurement circuit is used for measuring the insulation resistance of the photovoltaic strings connected in parallel; and the controller determines, according to the current, the voltage and the insulation resistance, whether the photovoltaic strings have a reverse connection fault. When performing determination on the photovoltaic strings, three parameters, i.e., the current, the voltage and the insulation resistance, are comprehensively determined, so that whether the photovoltaic strings really have the reverse connection fault can be accurately determined, and the impact on power generation capacity caused by erroneous determination is reduced. Whether the reverse connection fault occurs cannot be accurately determined only by means of the current, and other faults may also cause current reverse.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

An outdoor cabinet, comprising a cabinet body (101), an auxiliary mount (103) and an air conditioner (102). The auxiliary mount (103) is fixed to an inner side surface of a preset side wall (111) in the cabinet body (101) and enslcoses an air conditioner mounting space with the preset side wall (111); the inner side surface of the preset side wall (111) is a surface of the preset side wall (111) facing the interior of the cabinet body (101); the air conditioner (102) is mounted in the air conditioner mounting space, and the air conditioner (102) is positioned inside the cabinet body (101); and an opening is provided at the end of the auxiliary mount (103) facing away from the preset side wall (111), and each of an inner circulation air inlet and an inner circulation air outlet of the air conditioner (102) is exposed inside the cabinet body (101) via the opening. By mounting the auxiliary mount in the cabinet body and enclosing the air conditioner mounting space with the preset side wall, the air conditioner can be assembled, the air conditioner is also prevented from protruding from an outer surface of the preset side wall, and an appearance structure of the entire outdoor cabinet is ensured to be attractive.

Classes IPC  ?

• H02B 1/56 - Refroidissement; Ventilation
• H02B 1/32 - Montage de dispositifs à l'intérieur de ces enveloppes
• H02B 1/04 - Montage sur ces dispositifs d'interrupteurs ou d'autres dispositifs en général, l'interrupteur ou le dispositif étant muni ou non d'une enveloppe
• H02S 10/00 - Centrales électriques PV; Combinaisons de systèmes d’énergie PV avec d’autres systèmes pour la production d’énergie électrique

Abrégé

The present application provides a converter and a chopper transistor blocking control method therefor. According to the chopper transistor blocking control method, when switching transistors in a converter need to be blocked, switching transistors in a primary side circuit connected to a transformer of the converter are blocked, and switching transistors in a secondary side circuit are blocked when the current on a branch where a secondary side winding in the transformer is located is zero, or batch blocking of the switching transistors in the secondary side circuit is completed after the current on the branch where the secondary side winding is located recirculates to zero, thereby avoiding overvoltage damage to the switching transistors caused by the current on the branch where the secondary side winding is located recirculating by means of the junction capacitance of the switching transistors in the secondary side circuit.

Classes IPC  ?

• H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle

Abrégé

The present application discloses an isolated AC-DC converter, a charging device, and a power supply system. The isolated AC-DC converter comprises: a PFC filter, wherein an input end of the PFC filter is connected to an alternating current; a PFC circuit, wherein an input end of the PFC circuit is connected to an output end of the PFC filter, and an output end of the PFC circuit is connected to an input end of a DC-DC circuit; and the DC-DC circuit, comprising a transformer, wherein the transformer comprises: a primary winding, a secondary winding, and a first shielding layer; the first shielding layer is arranged between the primary winding and the secondary winding; the first shielding layer is connected to the PFC filter for preventing an interference signal from being transmitted to the secondary winding. In order to prevent an interference source from being transmitted to the secondary winding by means of the primary winding, the interference signal of the primary winding of the transformer is transmitted back to the PFC filter by means of the first shielding layer to form a common-mode loop for preventing the interference signal from being transmitted to the secondary winding. According to the solution, an EMC filter does not need to be additionally arranged, a shielding layer is additionally arranged, the implementation is easy, and the size and the volume are not greatly increased.

Classes IPC  ?

• H02M 1/44 - Circuits ou dispositions pour corriger les interférences électromagnétiques dans les convertisseurs ou les onduleurs
• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
• H02M 1/42 - Circuits ou dispositions pour corriger ou ajuster le facteur de puissance dans les convertisseurs ou les onduleurs
• H02M 7/217 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 7/219 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs dans une configuration en pont

Abrégé

A grounding structure and electrical equipment. The electrical equipment comprises a case (1) having a grounding requirement and a functional device (2) at least partially disposed outside the case (1); the grounding structure comprises at least one grounding connecting portion (3), and the grounding connecting portion (3) is disposed on the housing wall of the part, located outside the case (1), of the functional device (2); and the housing wall of the functional device (2) is conductively connected to the case (1). According to the grounding structure, in the practical application process, the grounding connecting portion (3) is arranged on the housing wall of the functional device (2), and the housing wall of the functional device (2) is conductively connected to the case (1), so that the grounding requirement of the case (1) of the electrical equipment can be satisfied, the internal space of the case (1) does not need to be occupied, i.e., the safety space between the grounding connecting portion (3) and electrical components in the case (1) does not need to be considered, and thus the miniaturization of the case (1) is facilitated.

Classes IPC  ?

• H01R 4/66 - Connexions à la masse terrestre, p.ex. plaque de terre, piquet de terre

Abrégé

Disclosed in the present invention are a photovoltaic system direct-current arc fault detection method, apparatus and device, and a computer readable storage medium. The method comprises: detecting whether an optimizer control apparatus and a power optimizer in a photovoltaic system are in a communication state; if it is determined that the optimizer control apparatus and the power optimizer are not in the communication state, acquiring a direct-current side alternating-current signal of an inverter in the photovoltaic system; extracting a signal feature of a preset arc detection frequency band in the direct-current side alternating-current signal as a first arc signal feature; and analyzing according to the first arc signal feature to obtain a direct-current arc fault detection result of the photovoltaic system. According to the present invention, direct-current arc fault detection is performed by using gaps in power optimizer communication; thus, the impact of power optimizer communication on arc detection is avoided while functions of the power optimizer and the arc detection are compatible, and the false detection rate of arc detection is reduced.

Classes IPC  ?

• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts
• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive

Abrégé

A charging device, comprising a housing, a charging unit, and fans. The housing is provided with an accommodation cavity; the housing is provided with air inlets and air outlets communicated with the accommodation cavity; the charging unit is provided in the accommodation cavity, and comprises charging modules, the charging modules being used for charging batteries; and the fans are located at the air inlets, such that cold air is injected into the accommodation cavity through the air inlets, flows through the charging modules, and is exhausted through the air outlets. According to the technical solution of the present application, the service life of the fans can be ensured, and the heat dissipation efficiency and the use safety of the charging modules can also be improved, thereby promoting the reliable usage of the charging device.

Classes IPC  ?

• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage
• B60L 53/302 - Refroidissement des équipements de charge

Abrégé

Disclosed in the present application are an isolated matrix converter and a control method. The converter comprises bidirectional switch modules, a transformer, a resonant inductor, a resonant capacitor and bridge arm capacitors, a bidirectional switch module and a bridge arm capacitor being connected in series to form a bridge arm of the converter, each bridge arm of the converter comprising at least one bidirectional switch module, the primary winding of the transformer being connected to the resonant inductor and the resonant capacitor in series and then connected to two ends of the bridge arms of the converter, each bidirectional switch module comprising a clamping capacitor and bidirectional switch units, the bidirectional switch units forming two bridge arms of the module, two ends of the clamping capacitor being connected to two ends of the two bridge arms of the module, the clamping capacitor and the two upper bridge arms or two lower bridge arms of the two bridge arms forming a clamping absorption circuit, each bidirectional switch unit comprising at least two controllable switching transistors, and the clamping capacitor inhibiting a voltage spike generated during an action of the switching transistors in the bidirectional switch module. Therefore, the switching transistors are protected and the safety of the whole converter is further protected, improving the reliability of the whole converter.

Classes IPC  ?

• H02M 7/797 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif avec possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 5/10 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p.ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases sans transformation intermédiaire en courant continu par convertisseurs statiques utilisant des transformateurs
• H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif
• H02J 7/06 - Régulation du courant ou de la tension de charge utilisant des tubes à décharge ou des dispositifs à semi-conducteurs

Abrégé

Provided in the present application are a wiring device for a photovoltaic device, and a photovoltaic apparatus. The wiring device for a photovoltaic device comprises a first component and a second component. The first component is arranged at one end of the photovoltaic device; the second component is detachably connected to the first component; and the second component is used, when being connected to the first compoent, for being connected to the photovoltaic device by means of the first component, and for supplying power to the photovoltaic device or being supplied power therefrom. The technical solutions of the embodiments of the present application can solve the problem of wiring being difficult due to the wiring space being tight at the bottom of a photovoltaic device, such that the effect of the photovoltaic device being capable of being electrically connected to an external cable, without needing wiring every time, is achieved.

Classes IPC  ?

• H02S 40/30 - Composants électriques

Abrégé

A case and an electrical device. The case comprises a case body, a case cover and a connecting mechanism, wherein the case body is provided with a cavity and an opening in communication with the cavity; the case cover covers the opening; and the connecting mechanism is connected between the case body and the case cover, at least one connecting mechanism comprises a reinforcing member, the reinforcing member is connected to the case body, and the material and/or thickness and/or contact area of the reinforcing member of the at least one connecting mechanism is different from that of reinforcing members of the other connecting mechanisms. The technical scheme of the utility model can prevent the case cover from flying out to cause a potential safety hazard, when a machine in the case explodes.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails
• H05K 5/06 - Enveloppes scellées hermétiquement

Abrégé

Disclosed in the present invention is a photovoltaic connector, comprising a socket, and plugs configured to be inserted into the socket, wherein each plug is provided with at least one photovoltaic cable configured to be electrically connected to the socket; the socket is configured to be connected to at least two plugs in an inserted manner; and/or, the number of the photovoltaic cables of at least one plug is at least two. In the photovoltaic connector, if the socket is configured to be connected to at least two plugs in an inserted manner, in comparison with the prior art in which sockets correspond to plugs on a one-to-one basis, the number of the sockets is reduced, and the area of the box that is occupied by the socket is reduced, thereby reducing the overall size of the box. If the number of the photovoltaic cables of at least one plug is at least two, in comparison with the prior art in which each plug is provided with one photovoltaic cable, the number of the plugs and an operation space to be reserved for plugging and unplugging the plug are reduced, and the area of the box that is occupied by the photovoltaic connector is reduced, thereby reducing the overall size of the box.

Classes IPC  ?

• H01R 13/10 - Alvéoles destinés à coopérer avec des broches ou lames
• H01R 13/04 - Broches ou lames destinées à coopérer avec des alvéoles
• H01R 13/73 - Moyens de montage des pièces de couplage sur les appareils ou structures, p.ex. sur un mur
• H01R 13/514 - Socles; Boîtiers formés comme un bloc ou un assemblage modulaire, c. à d. composés de parties coopérantes pourvues de pièces de contact ou maintenant entre elles des pièces de contact

Abrégé

Disclosed in the present utility model is an electrical device, comprising a box body and a plurality of hanging members. Apparatuses are provided outside the box body; the handing members are respectively fixed to the apparatuses, and a first handing member and a second hanging member in the hanging members are distributed on two sides of the box body. The hanging members in the electrical device are mounted on the apparatuses outside the box body instead of being directly mounted on the box body, such that the area of the box body is saved, the box body is prevented from being set to be larger due to the assembly of the hanging members, and the miniaturization requirements in the prior art on the electrical device are met. In addition, the box body does not need to be set to be large, and the cost can be saved. Further disclosed in the present utility model are an electrical device hanging system and a photovoltaic power station which respectively use the electrical device, and the miniaturization requirements in the prior art on the electrical device are met.

Classes IPC  ?

• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif

Abrégé

A sealing device and a mechanical apparatus. The sealing device comprises a mounting plate and a plurality of first sealing cylinders disposed on the mounting plate, and the mounting plate is provided with through holes through which a member to be sealed passes. The plurality of first sealing cylinders are spaced apart and nested with each other on the mounting plate. Each first sealing cylinder is provided with a first opening and a second opening, the first opening is connected to the outer periphery of the corresponding through hole, and the second opening abuts against the surface of the member to be sealed so as to seal the outer periphery of the member to be sealed. By means of the technical solution of the present invention, an operator can conveniently seal the member to be sealed.

Classes IPC  ?

• H02G 3/22 - Installations de câbles ou de lignes à travers les murs, les sols ou les plafonds, p.ex. dans les immeubles

Abrégé

Disclosed in the present application are a photovoltaic system, an inverter starting method and a photovoltaic energy storage system. The photovoltaic system comprises a shutdown device, a controller and an inverter, the inverter comprising a direct current-direct current circuit and an inverter circuit, the direct current-direct current circuit at least comprising a boost circuit, an input end of the shutdown device being used for connecting a photovoltaic panel, an output end of the shutdown device being connected to an input end of the direct current-direct current circuit, an output end of the direct current-direct current circuit being connected to an input end of the inverter circuit, the controller being used for controlling the inverter to complete a starting process in a plurality of stages when starting the inverter during which a starting time of the inverter is longer than a single conduction maintaining time of the shutdown device, and each stage corresponding to the shutdown device being awakened and conducted once. During the starting process of the inverter, after the shutdown device is awakened for a while, if the shutdown device detects that parameters thereof meet a shutdown condition, the shutdown device will be automatically shut down; at this moment, the starting process of the inverter is not completed yet, so that the shutdown device needs to be awakened again; and said steps are repeated until the inverter is successfully started.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

An arc fault detection method and apparatus, and a device. The method comprises: acquiring a preset arc feature value, which is calculated on the basis of a collected direct current side signal of an inverter (S11); acquiring an initial feature threshold value (S12); according to the magnitude relationship between the preset arc feature value and the initial feature threshold value, determining whether a suspected arc occurs (S13); if so, performing a wave sealing operation on the inverter, and at least on the basis of an electric signal of the inverter after the wave sealing operation is performed thereon, determining an arc detection result corresponding to the suspected arc (S14), wherein the arc detection result comprises a real arc or a false arc; and on the basis of the arc detection result, adjusting an initial threshold value to obtain a target threshold value, and updating the initial feature threshold value to the target threshold value (S15). That is, in the method, the used initial feature threshold value can be adjusted according to the arc detection result of the actually detected suspected arc, such that the initial feature threshold value better conforms to an actual application environment, and the accuracy of the initial feature threshold value is improved, thereby improving the arc fault detection accuracy.

Classes IPC  ?

• G01R 31/12 - Test de la rigidité diélectrique ou de la tension disruptive
• H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts

Abrégé

An inverter and an inverter system. The inverter comprises an inverter module and a power distribution unit; the inverter module has a first direction and a second direction which are perpendicular to each other; the inverter module is provided with a direct current input end and an alternating current output end, and the direct current input end and the alternating current output end are distributed on two sides of the inverter module in the first direction; the power distribution unit comprises a direct current module and an alternating current module, and the direct current module and the alternating current module are provided at a same end of the inverter module in the second direction; the direct current input end faces the power distribution unit; the alternating current output end faces the power distribution unit; the direct current module is electrically connected to the direct current input end; the alternating current module is electrically connected to the alternating current output end. According to the technical solution of the present utility model, the cable consumption of the inverter can be reduced, and the operation safety and maintainability of the inverter are improved.

Classes IPC  ?

• H02M 7/42 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage
• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

Provided in the present application is a micro inverter. In a main circuit of the micro inverter, after N conversion branches are cascaded with each other, the same transformer is shared to connect a secondary-side bridge arm, thereby avoiding the need for N transformers in the prior art; moreover, by means of cascading, the N conversion branches can realize decoupling in terms of control, thereby avoiding the need to additionally equip each branch with a device for decoupling, and thus reducing the volume and costs. In addition, each direct-current source or load can realize alternating-current grid connection only by means of one-stage conversion, and therefore, the conversion efficiency is improved compared with a two-stage conversion structure in the prior art.

Classes IPC  ?

• H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont

Abrégé

Provided are an on-board charger, a DCDC converter and a control method. An input end of a high-voltage direct-current conversion circuit is connected to an output end of a power factor correction circuit, an input end of a low-voltage direct-current (LVDC) conversion circuit is connected to an output end of the high-voltage direct-current conversion circuit or the output end of the power factor correction circuit, and an output end of the low-voltage direct-current conversion circuit is connected to a low-voltage battery; and the low-voltage direct-current conversion circuit comprises a main power tube and a controllable switching tube. When the low-voltage direct-current conversion circuit starts, a controller generates a driving signal for the main power tube by using a current loop soft start, such that a current flowing through an inductor gradually increases; a given current value of a current loop depends on a reference current value, which is output by a voltage loop, and an output result of a soft start function; and after the start of the low-voltage direct-current conversion circuit is completed, the voltage loop and the current loop are cascaded to generate a driving signal for the main power tube, and the voltage loop outputs the reference current value to an input end of the current loop, thereby reducing an impact current to the main power tube when the LVDC conversion circuit starts.

Classes IPC  ?

• H02M 1/36 - Moyens pour mettre en marche ou arrêter les convertisseurs
• H02J 7/02 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries pour la charge des batteries par réseaux à courant alternatif au moyen de convertisseurs

Abrégé

Disclosed is an energy storage battery system, comprising: a liquid cooling unit, the liquid cooling unit having a coolant outlet and a coolant inlet; a supporting structure, the supporting structure being at least partially open, and the supporting structure internally having a first coolant channel and a second coolant channel, an inlet of the first coolant channel being communicated with the coolant outlet of the liquid cooling unit, an outlet of the second coolant channel being communicated with the coolant inlet of the liquid cooling unit; a plurality of battery modules assembled on the supporting structure, each battery module internally having a heat exchanger, a coolant inlet of the heat exchanger being communicated with an outlet of the first coolant channel, a coolant outlet of the heat exchanger being communicated with an inlet of the second coolant channel. With the structural design of the energy storage battery system, flexible changes can be made to the quantity and positions of battery modules.

Classes IPC  ?

• H01M 10/613 - Refroidissement ou maintien du froid
• H01M 10/627 - Installations fixes, p.ex. ensemble de production d’énergie tampon ou de production d’énergie de secours
• H01M 10/6568 - Liquides caractérisés par des circuits d'écoulement. p.ex. boucles, situés à l'extérieur des éléments ou des boîtiers des éléments

Abrégé

Disclosed are a power device and a photovoltaic power generation device. The power device comprises a case, a first power board, and a second power board, the first power board is arranged in the case, and a first boosting module and an inverter module are arranged on the first power board; the second power board is arranged in the case, the second power board is electrically connected to the first power board, and a second boosting module is arranged on the second power board. According to the technical solution of the present invention, the rated power generation power of the photovoltaic power generation device can be increased, and the flexibility for clients is improved.

Classes IPC  ?

• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif
• H05K 7/14 - Montage de la structure de support dans l'enveloppe, sur cadre ou sur bâti
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage
• H02S 40/32 - Composants électriques comprenant un onduleur CC/CA associé au module PV lui-même, p.ex. module CA

Abrégé

Provided in the present application are a string-type inversion-boost all-in-one machine and a power station system. The string-type inversion-boost all-in-one machine comprises: a low-voltage switch, a boost device, and a plurality of string inversion units, wherein each string inversion unit, the low-voltage switch and the boost device are all arranged on a platform of the string-type inversion-boost all-in-one machine; an alternating-current side of each string inversion unit is electrically connected to the boost device by means of a low-voltage alternating-current bus and a low-voltage switch cabinet in sequence; and a direct-current wiring area of each string inversion unit is arranged on the outer side of the string-type inversion-boost all-in-one machine. Therefore, an inverter and the boost device are integrated together, and the onsite wiring of the string-type inversion-boost all-in-one machine is convenient and simple.

Classes IPC  ?

• H02S 40/32 - Composants électriques comprenant un onduleur CC/CA associé au module PV lui-même, p.ex. module CA
• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif

Abrégé

Disclosed in the present invention are a pressure relief device and electrical equipment. The pressure relief device comprises a first housing and a second housing which are mutually covered and arranged, and fasteners used for connecting the first housing and the second housing; a mounting via hole is formed in the first housing; a connecting hole corresponding to the mounting via hole is formed in the second housing. A fastening assembly connects the mounting via hole and the connecting hole. First locking structures and second locking structures spaced apart from each other are matched and formed between the fastening assembly and the first housing; in an initial state, the first locking structures stop the first housing in a direction away from the second housing, and under impact of external force, the first locking structures are damaged, and the second locking structures stop the first housing in a direction away from the second housing. The technical solution of the present invention can reduce the possibility that the assemblies of the pressure relief device are exploded due to explosion, and guarantee the safety of peripheral equipment and personnel.

Classes IPC  ?

• H02B 1/26 - Enveloppes; Leurs parties constitutives ou accessoires à cet effet

Abrégé

Disclosed in the present invention are an electronic element and a high-frequency winding thereof. At least one power transmission line of the high-frequency winding is a multi-layer stranded wire, the multi-layer stranded wire comprises at least two stacked layers of cables, and each layer of the cables comprises a plurality of cables which are sequentially arranged; and any layer of the cables in the multi-layer stranded wire is at least stranded with an adjacent layer of cables, a cross section obtained by cutting the multi-layer stranded wire in any plane perpendicular to the lengthwise direction of the power transmission line comprises cross sections of a plurality of layers of cables, which layers are stacked in a first direction, the cross section of each layer of the cables comprises cross sections of a plurality of cables, which are sequentially arranged in a second direction, and the first direction is perpendicular to the second direction. The structural design of the high-frequency winding can effectively reduce the deformation and wear of a paint film, thereby reducing high-frequency resistance.

Classes IPC  ?

• H01F 27/28 - Bobines; Enroulements; Connexions conductrices

Abrégé

The present invention relates to a wiring structure and an electrical box, the wiring structure comprising a first mounting member and a second mounting member, wherein the first mounting member is used for being arranged outside the electrical box, and is provided with a plurality of conductive connectors; the conductive connectors extend into the electrical box to be connected to an internal device; the second mounting member is used for being detachably connected to the first mounting member, and is internally provided with a plurality of conductive fitting members; the conductive fitting members are connected to external cables; the external cables are slidably fitted with the second mounting member in a sealed manner; and the conductive fitting members are used for being connected to the conductive connectors in a fitting manner when the second mounting member is connected to the first mounting member in a fitting manner. The above wiring structure can achieve a fixed connection between a plurality of cables and the electrical box by means of a set of butt-connection structures, i.e. the first mounting member and the second mounting member, has a small size and a compact structure, and can improve the efficiency of plugging and mounting external cables and reduce errors; moreover, each of the conductive fitting members can be individually plugged and unplugged, and the operations are more flexible.

Classes IPC  ?

• H01R 13/642 - Moyens pour empêcher, bloquer ou éviter le couplage incorrect par la position ou la forme des pièces de contact
• H01R 13/40 - Fixation des pièces de contact dans ou sur un socle ou un boîtier; Isolement des pièces de contact

Abrégé

The present application relates to the technical field of vehicle-mounted charging, and provides a working mode switching control method and device for a vehicle-mounted charger, and a vehicle-mounted charger. The working mode switching control method for a vehicle-mounted charger comprises the following steps: obtaining a working mode switching signal of a vehicle-mounted charger, wherein the working mode switching signal comprises a switching signal for switching, in different power modules of the vehicle-mounted charger, the voltage of a direct-current bus controlled by means of an original power module to the voltage of a direct-current bus controlled by a power module to be started; according to the working mode switching signal of the vehicle-mounted charger, firstly controlling the power module to be started to start by using a current source control mode and adjusting a current given value according to a working condition until the required power of a system is borne; and controlling a control mode of the power module to be started to be switched to a voltage source control mode, and causing same to control the voltage of the direct-current bus. In the present invention, when the vehicle-mounted charger performs working mode switching, power supply interruption of a low-voltage end is avoided while the voltage stability of the direct-current bus is ensured.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• H02M 1/42 - Circuits ou dispositions pour corriger ou ajuster le facteur de puissance dans les convertisseurs ou les onduleurs

Abrégé

Provided are a photovoltaic system and a control method. A negative output end of a master DC/DC converter (101) is connected to an N line, and a negative input end of a master DC/AC converter (201) is connected to the N line; a negative input end of a slave DC/DC converter (102) is connected to the negative output end of the master DC/DC converter (101), and a positive input end of the slave DC/DC converter (102) is connected to a positive output end of the master DC/DC converter (101); a positive output end of the slave DC/DC converter (102) is connected to the N line, a negative output end of the slave DC/DC converter (102) is connected to a negative output end of a slave DC/AC converter (202), and a positive output end of the slave DC/AC converter (202) is connected to the N line; the master DC/AC converter (201) sends, to the slave DC/AC converter (202), a current instruction value, and an input voltage of the master DC/AC converter (201); and the slave DC/AC converter (202) controls an output current according to an input voltage of the slave DC/AC converter (202), the current instruction value, and the input voltage of the master DC/AC converter (201), such that the current of the N line is lower than a preset current, thereby reducing power consumption.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02S 40/30 - Composants électriques
• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 1/36 - Moyens pour mettre en marche ou arrêter les convertisseurs
• H02M 7/5375 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur avec équipement particulier de démarrage
• H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont

Abrégé

A junction box and an inverter, relating to the technical field of electronic power supplies. The junction box (100) comprises a base (1), a box body (3), and a locking assembly (2), the base (1) being used to be fixed at a position to be installed, the box body (3) being connected to the base (1), the locking assembly (2) being slidably connected to the base (1), and the locking assembly (2) being provided with a guide clamping groove (2111), the guide clamping groove (2111) being able to slide laterally along the box body (3), so that the box body (3) is clamped into the guide clamping groove (2111). When it is necessary to mount the box body (3) onto the base (1), it is only necessary to place the box body (3) below the base (1) along the guide clamping groove (2111), and then cause the guide clamping groove (2111) to slide along a side direction of the box body (3), so that stable mounting of the box body (3) and the base (1) in a narrow installation space can be achieved; in addition, the structure is simple and easy to operate. The inverter, by means of arranging the junction box (100) on the inverter body (200), facilitates connection of a cable to the inverter body (200) in a narrow space.

Classes IPC  ?

• H02G 3/08 - Boîtes de distribution; Boîtes de connexion ou de dérivation
• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif

Abrégé

An inverter and a direct-current switch assembly. The direct-current switch assembly comprises a direct-current switch and a connecting terminal unit, the direct-current switch and the connecting terminal unit being integrated on a mounting main body, the connecting terminal unit can realize connection and disconnection of a first terminal and a second terminal by means of the direct-current switch, and the direct-current switch is directly connected to a direct-current cable by means of the first terminal. The direct-current switch and the connecting terminal unit of the present invention are integrally mounted, not requiring a cable connection, improving disassembly and installation efficiency while reducing the number of electric devices and structural parts in a machine box, and capable of saving mounting space in the machine box.

Classes IPC  ?

• H01H 1/58 - Connexions électriques avec ou entre contacts; Bornes
• H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu; Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif

Abrégé

Disclosed in the present invention are a PV terminal assembly and an electrical device. The PV terminal assembly comprises a mounting frame and at least one PV terminal; the mounting frame is provided with mounting positions used for fixing PV terminals, and there are at least two mounting positions. In the PV terminal assembly disclosed in the present invention, the mounting frame is provided with mounting positions used for fixing PV terminals, and there are at least two mounting positions, so that at least two PV terminals can be integrated on the mounting frame. The number of PV terminals on the whole PV terminal assembly can be adjusted by adjusting the number of PV terminals on the mounting frame; thus, the expandability and compatibility are improved, the whole electrical device can be compatible with a variety of input configurations, and the development efficiency is improved. Moreover, the space occupied by all the PV terminals can be reduced, thereby reducing the size of the whole electrical device; installation of the PV terminals is also simplified, thereby improving the installation efficiency.

Classes IPC  ?

• H01R 9/26 - Blocs de connexion à accrochage pour le montage côte à côte sur rail ou sur barrette

Abrégé

The present application provides a photovoltaic power generation system and a control method therefor, and a power converter. The control method for the photovoltaic power generation system comprises: first obtaining the MLPE state characterization information of a photovoltaic string, and then determining, according to the MLPE state characterization information, whether there is at least one MLPE device that is not in a normal output state in the photovoltaic string; and if there is at least one MLPE device that is not in the normal output state in the photovoltaic string, controlling the current of the corresponding string to be less than a preset threshold. Therefore, the power consumption of the corresponding MLPE device in a bypass operation state is reduced, so that the MLPE device can use a bypass diode having smaller power capacity and a heat dissipation measure with a lower heat dissipation requirement during design, and the system cost is reduced.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H01L 31/044 - Modules PV ou matrices de cellules PV individuelles comprenant des diodes de dérivation

Abrégé

The present invention relates to the technical field of electrical apparatuses, and discloses a cabinet and a cabinet system. The cabinet comprises a cabinet body (1), a cabinet door (2) and a protruding structure (3), wherein the cabinet door (2) is arranged on the cabinet body (1), one end of the cabinet door (2) is rotatably connected to the cabinet body (1), the other end of the cabinet door is a free end, and the cabinet door (2) can be opened or closed; the protruding structure (3) is arranged on an outer side of the cabinet door (2), the end of the protruding structure (3) close to the free end of the cabinet door (2) is rotatably connected to the cabinet door (2), and the end of the protruding structure (3) away from the free end of the cabinet door (2) is detachably connected to the cabinet door (2). When a plurality of mechanisms work side by side, the end of the protruding structure (3) away from the free end of the cabinet door (2) can be detached and opened first, and the protruding structure is then rotated by a certain angle around the end which is rotatably connected to the cabinet door (2), so as to avoid the situation where the cabinet door (2) cannot be opened due to the interference of the protruding structures (3) on adjacent cabinets.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

The present invention relates to the technical field of photovoltaic power generation, and discloses a case and a photovoltaic communication device. The case comprises a case body, a case door and at least two sealing members. At least two accommodating cavities are provided in the case body, and when the case door is locked on the case body, the accommodating cavities may be sealed by means of the sealing members, respectively. The case seals a plurality of accommodating cavities by means of the case door and a plurality of sealing members respectively, which may reduce the number of case doors and corresponding parts, simplify the assembly steps of the case, and reduce fabrication costs and maintenance costs of the case door.

Classes IPC  ?

• H05K 5/00 - Enveloppes, coffrets ou tiroirs pour appareils électriques

Abrégé

Provided are an energy conversion system, an over-temperature operation control method thereof, and a control apparatus (00), comprising: in accordance with the operating temperatures of at least two power modules, determining an over-temperature module and at least one non-over-temperature module; obtaining a derated operating power and a power derating difference value for the over-temperature module, and, in accordance with the power derating difference value, determining at least one increased-rating operating power, wherein the increased-rating operating power corresponds one-to-one to a non-over-temperature module; on the basis of the at least one increased-rating operating power, determining whether the system satisfies a preset no-derating operating condition; if the system satisfies the preset no-derating operating condition, then driving the over-temperature module to operate in accordance with the derated operating power, and driving the non-over-temperature module(s) to operate in accordance with the increased-rating operating power. By reducing the operating power of the over-temperature module, the temperature thereof is lowered, and by increasing the operating power of a non-over-temperature module, the overall power of the system can be kept unchanged, which is beneficial to improving system safety performance and power generation.

Classes IPC  ?

• H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
• H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present invention relates to the technical field of low-voltage power distribution systems, and in particular relates to a fuse-switch-disconnector assembly. The fuse-switch-disconnector assembly comprises at least one fuse-switch-disconnector. The fuse-switch-disconnector comprises an isolating switch and a fuse assembly that are detachably connected. The fuse assembly comprises a fuse and a protective box used for accommodating the fuse. The protective box is provided with a heat dissipation channel that dissipates heat from the fuse, and the protective box is further provided with a transparent window by means of which the state of the fuse can be observed. The fuse-switch-disconnector assembly may ensure that the normal operation of other circuits will not be affected when the fuse of a certain circuit is replaced. Moreover, the detachable connection between the isolating switch and the fuse assembly may facilitate the replacement of the fuse assembly, and by means of the transparent window, the fuse may be visualized and the state of the fuse may be promptly observed.

Classes IPC  ?

• H01H 89/00 - Combinaisons de plusieurs types d'interrupteurs électriques, de relais, de sélecteurs et de dispositifs de protection d'urgence, non couvertes par un des autres groupes principaux de la présente sous-classe
• H01H 85/47 - Moyens de refroidissement
• H01H 85/20 - Socles pour supporter le fusible; Leurs pièces détachées
• H01H 71/02 - Boîtiers; Enveloppes; Socles; Garnitures

Abrégé

A new-energy charging system, and an alternating-current charging pile and a charging method thereof. The charging method comprises: when an alternating-current charging pile is in a power-following mode, measuring an available input power of a system where the alternating-current charging pile is located; when the available input power is greater than or equal to a single-phase threshold value and is less than a three-phase threshold value, controlling the alternating-current charging pile to provide single-phase charging for an electric vehicle by means of a charging gun of the charging pile itself; and when the available input power is greater than or equal to the three-phase threshold value, controlling the alternating-current charging pile to provide three-phase charging for an electric vehicle by means of the charging gun of the charging pile itself. In the charging method, the output power of an alternating-current charging pile is adjusted by means of adjusting the number of charging phases, such that the output power of the alternating-current charging pile follows an available input power, thereby achieving the optimal energy efficiency and also achieving carbon balance.

Classes IPC  ?

• B60L 53/62 - Surveillance et commande des stations de charge en réponse à des paramètres de charge, p.ex. courant, tension ou charge électrique
• B60L 53/64 - Optimisation des coûts énergétiques, p.ex. en répondant aux tarifs d'électricité
• H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie

Abrégé

The present application provides a liquid level balance control method for a hydrogen production system and a hydrogen production system, which are applied to the technical field of hydrogen preparation. The method comprises: after obtaining a parameter value variation of a target electrical parameter and a parameter difference of target state parameters of a hydrogen separator and an oxygen separator, according to the parameter value variation, determining a first adjustment amount; on the basis of the first adjustment amount and the obtained parameter difference, further determining a target adjustment amount; and finally, according to the target adjustment amount, adjusting the liquid level of the hydrogen separator and/or the oxygen separator. In the present invention, the target electrical parameter is related to the hydrogen production power of the hydrogen production system. Since fluctuation of the hydrogen production power directly affects the change in liquid level of the hydrogen separator and the oxygen separator, and the change in liquid level occurs after the fluctuation of the hydrogen production power, the adjustment amount can thus be determined in advance before the hydrogen production power finally impacts liquid level deviation, response time of liquid level adjustment is shorter, liquid level balance control efficiency is effectively improved, liquid level fluctuation is smaller, and the liquid level balance control effect is improved.

Classes IPC  ?

• C25B 15/02 - Commande ou régulation des opérations
• C25B 15/023 - Mesure, analyse ou test pendant la production électrolytique
• C25B 9/00 - PROCÉDÉS ÉLECTROLYTIQUES OU ÉLECTROPHORÉTIQUES POUR LA PRODUCTION DE COMPOSÉS ORGANIQUES OU MINÉRAUX, OU DE NON-MÉTAUX; APPAREILLAGES À CET EFFET Éléments de structure des cellules; Assemblages d'éléments de structure, p.ex. assemblages d'électrode-diaphragme; Caractéristiques des cellules relatives aux procédés
• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau

Abrégé

Disclosed in the present application are a photovoltaic system, an IV scanning method and apparatus therefor, and a combiner box. The scanning method comprises: a combiner box acquiring string open-circuit voltages of photovoltaic strings, and sending the string open-circuit voltages to a preset controller; an inverter determining an initial scanning voltage according to the string open-circuit voltages, and controlling, on the basis of a first preset step, string output voltage values to gradually change from the initial scanning voltage to a preset voltage lower limit value; the combiner box acquiring, at each string output voltage value, the value of an output current which flows through the photovoltaic strings, and sending the string output voltage value and the value of the output current to the preset controller; and the preset controller determining a scanning sample point set of each photovoltaic string according to the string open-circuit voltage, the string output voltage value and the value of the output current. By means of the embodiments of the present invention, an IV scanning function of a single photovoltaic string is realized by means of a string open-circuit voltage and an output current value of the photovoltaic string, thereby facilitating an improvement in the scanning precision and an improvement in the performance prediction accuracy of a photovoltaic cell panel.

Classes IPC  ?

• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts

Abrégé

Disclosed in the present invention is a threading sealing box, relating to the technical field of cable joints. The threading sealing box comprises a box body and a threading assembly, wherein an opening is formed in the box body, a mounting groove is formed in a side wall of the box body, the threading assembly comprises a threading plate assembly and a threading body, the threading plate assembly is slidably arranged in the mounting groove so as to slide into or slide out of the mounting groove, a penetrating hole is formed in the threading plate assembly, the threading body is arranged on the threading plate assembly, and the threading body communicates with the penetrating hole. A cable penetrating through the threading body can be circumferentially sealed by the threading body, thereby effectively reducing the water leakage risk; the cable does not need to be locked by using accessories such as a waterproof terminal, such that the operation is simple; an installation space is small, and more cables can be installed in the same space, thereby effectively reducing the cable wiring cost; and the cable can be taken out without being lifted by a machine, and therefore carrying operations are reduced, and the labor cost is saved.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

The present invention relates to the technical field of power devices, and provides a cabinet. The cabinet comprises a cabinet body (300), a cabinet door (200), a pressure relief plate (500), and a reinforcement locking device (100). The cabinet body (300) and/or the cabinet door (200) is provided with a pressure relief port (400), the pressure relief plate (500) is used for plugging the pressure relief port (400), the reinforcement locking device (100) is configured to lock the cabinet door (200) on the cabinet body (300), and the locking strength of the reinforcement locking device (100) is greater than the plugging strength of the pressure relief plate (500). The locking strength of the reinforcement locking device (100) in the cabinet is high, such that the locking reliability of the cabinet door (200) can be ensured, and the pressure relief plate (500) cannot open in time when an arcing fault occurs, and the cabinet door (200) is flushed away to cause a safety accident, and the protection effect on electrical components inside the cabinet body (300) and operators in the vicinity of the cabinet is good.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

The present invention relates to the technical field of power equipment. Disclosed are a cabinet and a pressure relief method. The cabinet comprises a cabinet body; at least two accommodating cavities are provided in the cabinet body; each accommodating cavity is provided with a pressure relief port; the gas in each accommodating cavity can be discharged through the corresponding pressure relief port. The cabinet can separate multiple electrical components to prevent the multiple electrical components from affecting each other when working. In addition, multiple accommodating cavities can also satisfy the protection requirements of different electrical components, and have a good protection effect on the electrical components.

Classes IPC  ?

• H02B 1/56 - Refroidissement; Ventilation
• H02B 1/30 - Enveloppes; Leurs parties constitutives ou accessoires à cet effet - Parties constitutives ou accessoires

Abrégé

Disclosed are a case and a mounting piece thereof, and an electrical device. The mounting piece of the case comprises a case connecting outer wall and a cover plate connecting outer wall, wherein the case connecting outer wall is provided with a through hole allowing for a case fixing part on an inner wall of a case body to pass through. The provision of the through hole in the mounting piece of the case to allow the case fixing part on the inner wall of the case body to pass through enables the case fixing part to be directly fixed to the case body, without providing a hole in the case body, such that waterproofing can be achieved without providing a seal between the mounting piece and the case body, thus effectively reducing installation materials and improving installation efficiency; in addition, the case body and the mounting piece can be fixed at the interior of the case body, thereby preventing the exposure of case fixing parts and case connecting parts connected to the case fixing parts, thus improving the appearance of the whole case. Compared with the prior art, the provision of the through hole and the absence of a groove for accommodating the seal simplify the processing, effectively improve processing efficiency and reduce the processing cost.

Classes IPC  ?

• H05K 7/14 - Montage de la structure de support dans l'enveloppe, sur cadre ou sur bâti
• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

The present application provides an inverter and an alternating current fault identification method for a photovoltaic system. The method comprises: a controller performs waveform recording on the preset parameters of the photovoltaic system, and then uploads the recorded waveforms to an external device; and the external device having a high data storage capability and a high processing capability can store and subsequently process these waveforms, so as to accurately identify the fault of the alternating current side of an inverter. Moreover, an operator can see a fine waveform from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device makes full use of the advantages of storage capacity, big data, and computing power, analyzes the waveforms, and generates a control instruction to adjust the operation of the inverter, and thus, the control is more accurate. In addition, better system performance can be obtained by cooperating with local real-time and rapid control.

Classes IPC  ?

• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts

Abrégé

Provided are a balance control method and an energy storage system. Once a battery module is newly added, according to SOC values of battery modules, a control apparatus (11) determines a target battery module for which SOC adjustment needs to be performed from among a plurality of battery modules, and controls a switch corresponding to the target battery module to close, so as to adjust the SOC of the target battery module by means of a circuit where a bidirectional DC/DC apparatus (12) is located, until the SOCs of the plurality of battery modules are balanced. Since an energy storage system which comprises a bidirectional DC/DC apparatus (12), a control apparatus (11), a plurality of battery modules and corresponding connection relationships is used, battery modules having unbalanced SOCs may be automatically adjusted when a battery module is newly added. Finally, the SOCs of all battery modules are balanced, thereby improving the reliability of the operation of the energy storage system.

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H01M 10/44 - Méthodes pour charger ou décharger

Abrégé

Provided in the present application are a DC/DC conversion unit and an energy conversion system. An input end of a main circuit of the DC/DC conversion unit is provided with a first input port and a second input port, and an output end of the main circuit is provided with a first output port, a second output port and a third output port, wherein the voltage at the first input port is greater than the voltage at the second input port, the voltage at the first output port is a positive voltage, a voltage regulation target of the second output port is zero, and the voltage at the third output port is a negative voltage; and at least one output port is directly connected to the corresponding input port, so as to enable the input end of the DC/DC conversion unit to be connected to the output end thereof in series, such that an input voltage of the DC/DC conversion unit is connected to an output voltage thereof in series, thereby increasing the output voltage of the DC/DC conversion unit, and greatly reducing the transmission current and line loss of the output end of the DC/DC conversion unit.

Classes IPC  ?

• H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation

Abrégé

Disclosed is a connector (100) for a case shell of a power apparatus. The connector comprises a main body member (101), wherein two ends of the main body member (101) are respectively connected to different members of the case shell, and the main body member (101) is deformable; and the main body member (101) is used to deform when an explosion occurs inside the case shell and the different members of the case shell connected by means of the main body member (101) are disengaged from each other. The main body member (101) of the connector (100) can deform when devices inside the case shell explode and the different members of the case shell connected by means of the main body member (101) are disengaged from each other, such that two members of the case shell connected by means of the main body member (101) are slightly disengaged from each other to form a gap, so as to discharge the explosion pressure in the case shell for pressure relief, and the two members of the case shell are always connected to each other by means of the main body member (101), so as to prevent the members of the case shell and explosive foreign matter inside the case shell from flying out, thereby guaranteeing the safety of apparatuses and personnel on site. Further disclosed is a power apparatus case shell using the connector (100), which can prevent the safety of other apparatuses and personnel on site from being jeopardized when internal devices explode.

Classes IPC  ?

• H01H 33/575 - Dispositifs de décompression pour usage normal ou de protection
• H01H 33/53 - Enveloppes; Réservoirs, cuves, tuyauterie ou robinetterie pour le fluide d'extinction d'arc; Accessoires pour ces dispositifs, p.ex. dispositifs de sécurité, dispositifs de décompression
• H02B 13/025 - Dispositions pour la sécurité, p.ex. en cas de surpression ou d'incendie causés par un défaut électrique

Abrégé

The present invention relates to the field of electrical technology, and in particular, an electrical device. The electrical device provided by the present invention comprises a box, an external device and an external handle; the external device is fixed outside the box; the external handle is provided on the external device; and the external handle is used for carrying the electrical device. By providing the external handle on the external device, the external handle does not occupy the space of the box, and the occupation area of the box after the mounting of the external handle is reduced, such that the box can be made smaller, and the cost of the box is reduced, thereby reducing the cost of the whole machine, and improving the market competitiveness of the electrical device.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails

Abrégé

The present application provides a power conversion system, a power conversion apparatus, and a control method therefor. In the power conversion apparatus, input terminals of each DC/DC conversion circuit inside the power conversion apparatus are respectively connected to corresponding input power supplies, and the output terminals are connected in parallel. At least one DC/DC conversion circuit has a common positive electrode structure for input and output. Furthermore, at least one other DC/DC conversion circuit has a common negative electrode structure for input and output. Moreover, at least one input terminal negative electrode of the DC/DC conversion circuit which has a common positive electrode structure for input and output is connected, by means of a corresponding switch unit, to at least one input terminal positive electrode of the DC/DC conversion circuit which has a common negative electrode structure for input and output. Therefore, when the voltage of the input power supply is low, the switch unit can be conducted, so that input power supplies at two sides of the switch unit are connected in series. In addition, due to the structural configuration of the DC/DC conversion circuits at two sides of the switch unit, the two are bypassed, thereby increasing the conversion efficiency of the apparatus and reducing the heat generated by the circuit.

Classes IPC  ?

• H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
• H02M 1/42 - Circuits ou dispositions pour corriger ou ajuster le facteur de puissance dans les convertisseurs ou les onduleurs

Abrégé

A battery pack (10) detection control method, an energy storage conversion system and a computer-readable storage medium. The battery pack (10) detection control method comprises: when a battery pack (10) scanning detection instruction has been received, entering a battery pack (10) scanning working mode (S100); controlling at least one charging/discharging switching apparatus (20) among N charging/discharging switching apparatuses (20) to work in a charging mode, so as to control a corresponding battery pack (10) to work in the charging mode, and performing charging (S200); controlling at least one charging/discharging switching apparatus (20) among the remaining charging/discharging switching apparatuses (20) to work in a discharging mode, so as to control a corresponding battery pack (10) to work in the discharging mode, and discharging the battery pack (10) in the charging mode (S300); and detecting working parameters of the battery packs (10), so as to obtain charging curves of M battery packs (10) in the charging mode and to obtain discharging curves of battery packs (10) in the discharging mode among N-M battery packs (10) (S140), wherein 1 ≤ M < N. By means of the battery pack (10) detection control method, the energy storage conversion system and the computer-readable storage medium, the improvement of battery pack scanning detection efficiency and convenience is facilitated.

Classes IPC  ?

• G01R 31/396 - Acquisition ou traitement de données pour le test ou la surveillance d’éléments particuliers ou de groupes particuliers d’éléments dans une batterie

Abrégé

An MLPE photovoltaic system and an MLPE device detection method thereof. An output end of each MLPE device is connected to a corresponding bus in the MLPE photovoltaic system, and each MLPE device has its own positioning number. The method comprises detection operation which is executed at least once, and the detection operation comprises: controlling an MLPE device having a corresponding positioning number to perform operation state switching, and acquiring operation characteristics of a corresponding bus before and after switching (S101); determining whether the change of the operation characteristics satisfies a preset change condition (S102); and if not, determining that the state of the MLPE device having the corresponding positioning number is abnormal (S103). That is, the operation state of an MLPE detection device having a specific number in the MLPE photovoltaic system can be actively detected, such that the detection of the operation state of each MLPE device in the system is realized, the technician does not need to check each MLPE device on site, the time required for device operation and maintenance detection is shortened, and operation and maintenance checking costs are reduced.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02S 50/10 - Tests de dispositifs PV, p.ex. de modules PV ou de cellules PV individuelles

Abrégé

Provided in the present invention are an inverter and an integrated platform having same. The inverter comprises a cabinet having a cabinet door, an inverter body disposed in the cabinet, and a heat exchanger disposed on the exterior of the cabinet, wherein the inverter body has an alternating-current side, and the cabinet door is located on the alternating-current side of the inverter body or on the opposite side of the alternating-current side. In the present invention, the heat exchanger is disposed on the alternating-current side of the inverter body or the opposite side of the alternating-current side, so as to guarantee that when integration design is carried out for the inverter, the whole inverter can be located in a box body, thereby reducing the difficulty and costs of integration design of the inverter.

Classes IPC  ?

• H05K 5/02 - Enveloppes, coffrets ou tiroirs pour appareils électriques - Détails
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

Provided in the present application are a photovoltaic assembly shutoff device, an inverter, and a photovoltaic quick shutoff system and a starting method therefor. A direct-current side of the inverter is connected in parallel to a plurality of photovoltaic strings. The method comprises: after each photovoltaic assembly shutoff device in a system is started for the first time, each photovoltaic assembly shutoff device, which is started successfully, entering a non-limited output state; each photovoltaic assembly shutoff device, which fails to be started or is disconnected again, respectively measuring an electrical parameter of an output end of the photovoltaic assembly shutoff device in real time, and determining whether the electrical parameter meets a preset starting condition; and if the electrical parameter meets the preset starting condition, the photovoltaic assembly shutoff device controlling itself to start again and enter a non-limited output state. That is, the photovoltaic assembly shutoff device in the present solution can determine, merely by means of an original sampling device of itself, whether itself meets the preset starting condition, and the photovoltaic assembly shutoff device starts itself again after determining that the photovoltaic assembly shutoff device itself meets the preset starting condition. Compared with an existing starting mode, no extra corresponding receiving device needs to be provided, thereby reducing the hardware costs of the photovoltaic assembly shutoff device.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Provided in the present application are a photovoltaic rapid shutdown system and a control method therefor. In the control method, disturbance is applied to a direct current side of an inverter only when the inverter does not meet a start condition, that is, before the inverter is started; when the inverter meets the start condition, it is only necessary for the inverter to start and operate normally; and then, a shutdown device can determine its own state by means of determining whether an electrical signal at an output end thereof meets a preset condition. Therefore, compared with the prior art, in the control method, disturbance is applied to a direct current side of an inverter for a relatively short time, such that the complexity of controlling a photovoltaic rapid shutdown system can be reduced, and a generated influence on MPPT tracking can also be reduced, thereby reducing the loss of the amount of power generated.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Disclosed are a wind energy storage integrated converter, which comprises a power apparatus, a control apparatus, a grid connection apparatus, and at least one energy storage apparatus, the apparatuses being integrally connected; the energy storage apparatus is electrically connected to a direct current side of the power apparatus; the grid connection apparatus is electrically connected to an alternating current side of the power apparatus; and the control apparatus is used for controlling the energy storage apparatus, the power apparatus, and the grid connection apparatus. In the present wind energy storage integrated converter, the energy storage apparatus, the power apparatus, the control apparatus, and the grid connection apparatus are integrally connected, said invention has a high degree of integration, various apparatuses being mutually separated and scattered about on-site is prevented, assembly space can be maximally saved, the length of wiring between various apparatuses is shortened, and costs are saved. Further provided are a converter and a multi-energy complementary energy system.

Classes IPC  ?

• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion

Abrégé

A wind power energy storage system, comprising a converter (002) and an air-cooled energy storage cabinet (001). The converter (002) and the air-cooled energy storage cabinet (001) are arranged on the same layer of platform or different layers of platforms in a wind power tower drum (004). The air-cooled energy storage cabinet (001) comprises a cabinet frame (101) and a heat dissipation device (301). A battery cluster (201) is mounted in the cabinet frame (101), and heat dissipation channels are provided in the cabinet frame (101); the heat dissipation channels are respectively communicated with ventilation openings and a circulation opening on the cabinet frame (101). The heat dissipation device (301) is mounted on the cabinet frame (101), and the heat dissipation device (301) is used for driving air outside the cabinet frame (101) to be conveyed into the heat dissipation channels. Both the converter (002) and the air-cooled energy storage cabinet (001) of the wind power energy storage system are arranged in the wind power tower drum (004), the distance between the two is short, a wiring length can be shortened, and the cost can be saved. Also disclosed is a multi-energy complementary energy station.

Classes IPC  ?

• F03D 80/80 - Disposition des composants dans les nacelles ou les tours
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage
• H01M 10/613 - Refroidissement ou maintien du froid
• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
• F03D 1/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement parallèle au flux d'air pénétrant dans le rotor
• F03D 9/11 - Combinaisons des mécanismes moteurs à vent avec un appareil emmagasinant de l’énergie emmagasinant de l’énergie électrique
• H01M 10/625 - Véhicules
• H05K 7/00 - CIRCUITS IMPRIMÉS; ENVELOPPES OU DÉTAILS DE RÉALISATION D'APPAREILS ÉLECTRIQUES; FABRICATION D'ENSEMBLES DE COMPOSANTS ÉLECTRIQUES - Détails de construction communs à différents types d'appareils électriques

Abrégé

The present application provides a photovoltaic quick turn-off system and a control method therefor. When in a limited power operation state, an inverter applies, at least once, electrical signal disturbance to a direct-current bus of a system within each turn-off state entering period of a turn-off device in the system; each turn-off device can then detect its own input parameter and/or output parameter, and then determine whether electrical signal disturbance of the direct-current bus connected to the turn-off device itself meets a preset condition; and if the determination result is yes, the turn-off device enters or maintains a turn-on state. That is, in the control method for a photovoltaic quick turn-off system provided in the present application, an inverter intermittently applies electrical signal disturbance to a direct-current bus, such that it can be ensured that a turn-off device maintains a turn-on state, thereby preventing the loss of the power generation amount of a system that is caused by the turn-off device mistakenly turning off; and when the photovoltaic quick turn-off system is in a limited power operation state, the inverter can be prevented from continuously applying electrical signal disturbance, thereby ensuring that an output power does not exceed a power limit value.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present invention relates to the field of electrical technologies, and in particular to electrical equipment. The electrical equipment provided by the present invention comprises a box body, a device, and a sealing member having both an electromagnetic shielding function and a sealing function. The device is detachably fixed on the box body, the sealing member is disposed between the box body and the device, and the base surface of the device can be attached to the installation surface of the box body, such that the sealing member can ensure the sealing installation of the box body and the device, and can also enable the base surface of the device to be closely attached to the installation surface of the box body to ensure the electromagnetic shielding function of conductive contact between the box body and the device. In the case of ensuring the sealing performance by using the sealing member, the electrical equipment does not need to add additional conductive contact parts between the box body and the device to ensure the electromagnetic shielding function of the conductive contact between the box body and the device, thereby reducing the process difficulty, saving cost, causing no short circuit inside the box body, and ensuring the stable operation of the electrical equipment.

Classes IPC  ?

• H05K 9/00 - Blindage d'appareils ou de composants contre les champs électriques ou magnétiques

Abrégé

Provided in the present invention are a battery cluster and an energy storage system, which are applied to the technical field of energy storage. The battery cluster comprises a plurality of battery packs and at least one first fuse, wherein each battery pack is connected to each first fuse in series, so as to form a series branch, and the obtained series branch is connected to a switch box provided with a second fuse. By means of the battery cluster provided in the present invention, at least one first fuse is connected in series in the battery cluster, and the first fuse matches a second fuse in a switch box, so as to realize dual protection; and when the second fuse in the switch box fails, protection can be realized depending on the first fuse, such that the fuse protection reliability is effectively improved, and the safe operation of the battery cluster and the energy storage system is ensured.

Classes IPC  ?

• H01M 50/574 - Dispositifs ou dispositions pour l’interruption du courant

Abrégé

The present application discloses a series-type inverter system and a protection method therefor. In the present application, a fault current is suppressed when a positive line or negative line is short-circuited to the ground. A protective circuit comprises: a control unit and a bidirectionally controllable switching circuit; the bidirectionally controllable switching circuit is connected in series on a midpoint lead-out line obtained after direct-current sides of two inverter units are connected in series; the control unit is configured to, when it is detected that a current of the bidirectionally controllable switching circuit exceeds a threshold, control the bidirectionally controllable switching circuit to be disconnected from a conduction path that is in the same direction as a current fault current direction, or control bidirectional conduction paths of the bidirectionally controllable switching circuit to be simultaneously disconnected.

Classes IPC  ?

• H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p.ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont
• H02H 7/122 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour redresseurs pour convertisseurs ou redresseurs statiques pour onduleurs, c. à d. convertisseurs de courant continu en courant alternatif
• H02H 3/08 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge

Abrégé

Provided are an off-grid start method and system for a new energy power generation system. The method comprises: gradually boosting the voltage of a host according to a plurality of preset voltage given values, and slaves determining, by means of measuring a load voltage of a system, a target voltage given value used by the host; and the host determining, by means of monitoring an output current of the host itself, that a slave is successfully connected in parallel, and then continuing to boost the output voltage until all the slaves run in parallel. Therefore, according to the solution, no upper-layer synchronous control is required during a black-start process, and no communication between a host and slaves is required. Moreover, according to the solution, in the start process of slaves, only a slave (namely, a target slave) with a slave identifier matching the order of a target voltage given value in N voltage given values is started at the target voltage given value and is connected to a host in parallel, thereby ensuring that slaves are started and connected in parallel according to a certain sequence, and preventing the slaves from being simultaneously started in parallel.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Disclosed in the present invention are a photovoltaic tracking support control method, a photovoltaic tracking controller, and a photovoltaic tracking system. The method comprises obtaining photovoltaic tracking-related information, the photovoltaic tracking-related information comprising an alternating current power state, electric parameters, and a photovoltaic tracking support tracking command of a photovoltaic inverter; when the alternating current power state is an alternating current power limiting state, and the photovoltaic tracking support tracking command is a tracking support anti-tracking command, generating, according to the photovoltaic tracking-related information, a first control instruction for reducing an illumination angle of incidence; and controlling, according to the first control instruction, a photovoltaic tracking support to reversely track and rotate to reduce an illumination angle of incidence. In the present invention, when the photovoltaic inverter is in the alternating current power limiting state, and a direct current working voltage of the photovoltaic inverter exceeds a threshold voltage, the photovoltaic tracking support is controlled to reversely track and rotate to reduce the illumination angle of incidence, such that the power of a photovoltaic module mounted on the photovoltaic tracking support is appropriately decreased, and a direct current voltage of the photovoltaic inverter is reduced, thereby preventing the direct current voltage of the photovoltaic inverter from being too high.

Classes IPC  ?

• G05D 3/12 - Commande de la position ou de la direction utilisant la contre-réaction
• H02S 20/32 - Structures de support mobiles ou réglables, p.ex. pour réglage de l’angle spécialement adaptées pour le suivi du soleil

Abrégé

A start method for a photovoltaic rapid shutdown system, an application apparatus and a system. In the method, an inverter system (204) controls the voltage change of a corresponding direct current bus (203) in a photovoltaic rapid shutdown system; and a photovoltaic module shutdown device (202) performs determination according to a measured output voltage of itself, and controls itself to be turned on when the change characteristic of the voltage of the direct current bus (203) connected to itself satisfies a preset turn-on condition. Therefore, merely by means of a self-contained voltage sampling device, the photovoltaic module shutdown device (202) can determine whether a turn-on signal is received, without additionally providing a corresponding receiving device, thereby reducing hardware cost of the photovoltaic module shutdown device (202) while realizing communication between the photovoltaic module shutdown device (202) and the outside.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present invention provides a transformer, which is applied to the technical field of power transmission and distribution, the transformer comprising an iron core, body windings, and a semi-conductive layer, the body windings being sleeved on a core post of the iron core, and the semi-conductive layer being correspondingly provided with the body windings. Auxiliary circuits are connected to the body windings, the auxiliary circuits and preset positions of the body windings have equal potentials, and an equipotential connection point of the semi-conductive layer is provided by the auxiliary circuits. After the semi-conductive layer is connected to the auxiliary circuits, the effect of balancing the electric field distribution of a winding can be achieved. In the transformer provided in the present invention, an equipotential connection point having an equal potential with the preset positions of the body windings of the transformer is provided by means of the auxiliary circuits, and the semi-conductive layer is directly connected to the equipotential connection point, thereby achieving set effects of the semi-conductive layer, that is, improving the electric field distribution of windings, and improving the high-voltage insulation performance of the transformer without damaging the insulation between l itz wire strands.

Classes IPC  ?

• H01F 27/30 - Fixation ou serrage de bobines, d'enroulements ou de parties de ceux-ci entre eux; Fixation ou montage des bobines ou enroulements sur le noyau, dans l'enveloppe ou sur un autre support
• H01F 27/32 - Isolation des bobines, des enroulements, ou de leurs éléments

Abrégé

Disclosed is a medium-voltage photovoltaic grid-connection inverter system. The medium-voltage photovoltaic grid-connection inverter system comprises: a photovoltaic inverter having a direct current input end connected to a direct current busbar; a medium-voltage transformer having a low-voltage side connected to an alternating current output end of the photovoltaic inverter; a medium-voltage switch having an input terminal connected to a high-voltage side of the medium-voltage transformer, and an output terminal used to access a medium-voltage power grid, wherein a voltage sensor is integrated in the medium-voltage switch, so as to detect a line voltage at a high-voltage side of the medium-voltage transformer and a line voltage at the side of the medium-voltage power grid, and to generate a grid-connection voltage detection signal; and an inverter grid-connection controller connected to a controlled end of the medium-voltage switch and an output end of the voltage sensor, such that if the line voltage at the high-voltage side of the medium-voltage transformer and the line voltage at the side of the medium-voltage power grid are currently determined, according to the grid-connection voltage signal, to meet a grid-connection condition, then the inverter grid-connection controller controls the medium-voltage switch to close. The invention achieves medium-voltage grid connection of photovoltaic inverter systems without providing a ring main unit or an external voltage sensor.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Disclosed are a medium-voltage photovoltaic grid-connected inverter system and a photovoltaic power generation system. The medium-voltage photovoltaic grid-connected inverter system comprises: a photovoltaic inverter, a direct-current input end of which is connected to a direct-current busbar; a medium-voltage transformer, the low-voltage side of which is connected to an alternating-current output end of the photovoltaic inverter; a medium-voltage switch, an input terminal of which is connected to the high-voltage side of the medium-voltage transformer, and an output terminal of which is used for connecting to a medium-voltage power grid, wherein a current sensor is integrated in the medium-voltage switch, so as to detect a grid-connected current of the medium-voltage photovoltaic grid-connected inverter system and output a current detection signal; and an inverter grid-connected controller, which is connected to a controlled end and a current output end of the medium-voltage switch, wherein when the inverter grid-connected controller receives a grid connection instruction, and determines, according to the current detection signal, that the grid-connected current of the medium-voltage photovoltaic grid-connected inverter system is greater than a preset current threshold value, the inverter grid-connected controller controls the photovoltaic inverter to stop, and/or controls the medium-voltage switch to be switched off.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present application provides a transformer and a winding structure thereof. In the winding structure of the transformer, a reinforced insulating winding, all basic insulating windings, and all strong current windings are wound along a skeleton of a main structure of the transformer in a layered manner; moreover, in the vicinity of the reinforced insulating winding, at least one basic insulating winding is separately wound in front of and behind the reinforced insulating winding, such that at least one basic insulating winding is wound between the reinforced insulating winding and any strong current winding to increase the insulation thickness between the strong current winding and the reinforced insulating winding, thereby significantly reducing the discharge capacity of a partial discharge test of the transformer. Therefore, the problem in the prior art that a transformer in a photovoltaic high-voltage system cannot achieve reinforced insulation because its own partial discharge detection is difficult to meet the partial discharge requirement is solved.

Classes IPC  ?

• H01F 27/28 - Bobines; Enroulements; Connexions conductrices
• H01F 27/32 - Isolation des bobines, des enroulements, ou de leurs éléments

Abrégé

The present application provides a cascaded multi-port converter and a three-phase medium-voltage input system. Input ends of high-voltage conversion units are cascaded between two ports of an input end of the cascaded multi-port converter; a primary winding in a multi-winding transformer is connected to an output end of a corresponding high-voltage conversion unit; a secondary winding in each multi-winding transformer is connected to an input end of a corresponding low voltage rectifier unit; output ends of some of the low-voltage rectifier units are connected to a common bus, and the remaining low-voltage rectifier units outputs independently, such that at least one secondary winding in a corresponding multi-winding transformer has an indirect connection relationship with corresponding secondary windings in the other multi-winding transformers; and at least one secondary winding in at least one of the multi-winding transformers connected to the low-voltage rectifier units that are connected to the common bus has no indirect connection relationship, so that power balance between corresponding modular units is achieved, and the security of the cascaded multi-port converter is improved.

Classes IPC  ?

• H02M 7/217 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs

Abrégé

i1kpsjI1kpsjjkpskpsi1kpskps of the sᵗʰ transformer into use.

Classes IPC  ?

• H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs

Abrégé

Provided in the present application are a cascaded multi-port converter and a three-phase medium-voltage input system, wherein input terminals of all module units are cascaded, and two ends after cascading are used as two ports of the input terminals of the cascaded multi-port converter; in the module units, input ends of all high-voltage conversion units are cascaded, and two ends after the cascading are used as two ports of the input terminals of the module units; output ends of all the high-voltage conversion units are respectively connected to corresponding primary windings in each multi-winding transformer; each secondary winding in each multi-winding transformer is respectively connected as an output end of a module unit to the input end of a corresponding low-voltage rectifying unit; and a magnetic core in the multi-winding transformer is wound with a plurality of primary windings and a plurality of secondary windings. Therefore, the windings of the plurality of high-voltage conversion units share the magnetic core, the number of the multi-winding transformers in the cascaded multi-port converter can be reduced, and the number of the low-voltage rectifying units is correspondingly reduced, thereby reducing the volume, weight, and costs of the cascaded multi-port converter.

Classes IPC  ?

• H02M 7/217 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
• H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs

Abrégé

The Disclosed in the present application are a power electronic device on a direct-current side of a photovoltaic system, and a test system and a control method therefor, achieving a simple, fast, and low-cost functional test on the power electronic device during a production process or a troubleshooting process of the power electronic device on the direct-current side of the photovoltaic system. The power electronic device is used for detecting a fluctuation of an electric signal parameter of an input end of the power electronic device; when the fluctuation meets a preset condition, the device is switched from a limited output state to a non-limited output state; the fluctuation of the electric signal parameter of the input end is generated by applying a disturbance to the input end of the power electronic device on the direct-current side of the photovoltaic system by a direct-current power supply having a disturbance output.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts
• G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs

Abrégé

Disclosed is an inverter module, comprising a housing and an inverter body mounted within the housing. The housing and the inverter body are joined to form a cooling channel. A fan is mounted in the cooling channel. An air inlet and an air outlet in communication with the cooling channel are provided on the housing. The cooling channel is distributed at two sides of the inverter body. In the inverter module described above, the housing and the inverter body are joined to form the cooling channel, and the cooling channel at least is distributed at either side of the inverter body, thus allowing a cooling airflow to cool the inverter body from either side, favoring the implementation of even cooling, and increasing the cooling effect. Also disclosed is an inverter cabinet, which is applicable for the inverter module described above and provides an excellent cooling effect.

Classes IPC  ?

• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

Disclosed are a photovoltaic system and a control method therefor, for increasing the overall economy of the system. The photovoltaic system comprises a transformer having an MPPT function and at least one photovoltaic set series connected at the input side of the transformer and configured with a bypass apparatus. When turned on, the bypass apparatus is capable of bypassing some photovoltaic components in the present photovoltaic set series. The photovoltaic system is used for determining whether the transformer needs to run with a limited power; and if yes, turns on at least one bypass apparatus, thus allowing the output power of the transformer to meet a power-limiting requirement.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

A fault diagnosis method and a diagnosis device provided in the present invention are applied to the technical field of photovoltaic power generation. Said method comprises: acquiring a high-irradiance IV data set and a low-irradiance IV data set of a diagnosis object, taking any one IV data set as a target IV data set, selecting, from the target IV data set, target IV data as inflection point data, taking the other IV data set as a reference IV data set, and selecting, from the reference IV data set, IV data having the same voltage value corresponding to the target IV data to serve as reference IV data. If the reference IV data also belongs to the inflection point data, a mismatch type of the diagnosis object is determined according to the target IV data and the result of the irradiation degree changing with the reference IV data. According to the present method, by analyzing the IV data under different irradiation conditions, whether the mismatch fault of the diagnosis object is a front current mismatch or a back current mismatch is determined, such that decoupling of a fault determination result of the diagnosis object is achieved, and the accuracy of fault diagnosis is improved.

Classes IPC  ?

• H02S 50/10 - Tests de dispositifs PV, p.ex. de modules PV ou de cellules PV individuelles

Abrégé

Provided are a control method for a photovoltaic rapid switching-off system, and an application apparatus and system therefor. The method comprises: if an inverter system determines that a photovoltaic rapid switching-off system does not need to enter a preset safety state, applying a voltage and/or current fluctuation to a direct-current bus; a photovoltaic module switching-off device (202) performing determination according to an output parameter thereof; and when a voltage and/or a current of the direct-current bus (203) connected to the photovoltaic module switching-off device meets a preset condition, controlling/maintaining the switching-on of the photovoltaic module switching-off device. Therefore, the photovoltaic module switching-off device (202) executes switching-on or switching-off according to the fluctuation situation of the voltage and/or the current of the direct-current bus (203), that is, the communication between the photovoltaic module switching-off device (202) and the inverter system can be realized only by means of an original sampling device of the photovoltaic module switching-off device, and the photovoltaic module switching-off device (202) does not need to be additionally provided with a corresponding receiving device, and only a corresponding sending device needs to be added to the inverter system, thereby reducing the hardware cost of the photovoltaic rapid switching-off system.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present invention provides a direct-current coupling hydrogen production system and a control method therefor. The system comprises at least one power generation system and a plurality of hydrogen production tank systems. In the power generation system, the controller of the power generation system is used for controlling the power switching unit of the power generation system to directly supply, to corresponding hydrogen production tank systems by means of the corresponding output ports of the power switching unit, power that is received by means of the corresponding input ports of the power switching unit, or supply the power to the corresponding hydrogen production tank systems by means of the corresponding output ports of the power switching unit after the power is converged, so that the hydrogen production tank systems that receive the supplied power meet a hydrogen production power requirement and run independently from one another. Therefore, when the power of a single renewable energy system cannot meet the hydrogen production power requirement of a single hydrogen production tank system, the power switching unit can output the power of a plurality of renewable energy systems to the corresponding hydrogen production tank systems, and the hydrogen production tank systems that receive the supplied power run independently from one another, thereby improving the energy utilization rate and safety of the direct-current coupling hydrogen production system.

Classes IPC  ?

• H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie

Abrégé

The present invention provides a renewable energy-based hydrogen production and storage system and a control method thereof. The system comprises a renewable energy power generation subsystem, a water electrolysis hydrogen production subsystem, a heat tracing subsystem, and an organic matter hydrogen storage subsystem, wherein the heat tracing subsystem is connected between the organic matter hydrogen storage subsystem and the water electrolysis hydrogen production subsystem, and part of heat generated when the organic matter hydrogen storage subsystem generates a hydrogenated organic matter is transferred to the water electrolysis hydrogen production subsystem by means of the heat tracing subsystem to heat a water electrolysis hydrogen production device. According to the solution, the water electrolysis hydrogen production device is heated by utilizing heat generated by reaction of hydrogen and an organic matter, so that liquid in the water electrolysis hydrogen production device may not be frozen and crystallized in cold seasons, the next startup time is shortened while the system safety is guaranteed, and the production efficiency of the water electrolysis hydrogen production device is improved. Moreover, part of heat of the hydrogenated organic matter is used for heating the water electrolysis hydrogen production device, the cooling water consumption required for cooling the hydrogenated organic matter is reduced, and the energy utilization rate of the system is increased.

Classes IPC  ?

• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
• C25B 15/02 - Commande ou régulation des opérations
• C01B 3/00 - Hydrogène; Mélanges gazeux contenant de l'hydrogène; Séparation de l'hydrogène à partir de mélanges en contenant; Purification de l'hydrogène
• F28D 21/00 - Appareils échangeurs de chaleur non couverts par l'un des groupes

Abrégé

The present application provides a power conversion apparatus. An additional heat capacity apparatus thereof is connected to a heating body by means of a low-heat-resistance channel, and the heat capacity of the heating body is increased, so that a temperature rise rate of the heating body can be reduced when the temperature of the heating body rapidly rises due to large transient loss, thereby lowering the temperature of the heating body at the end of the short-time peak working condition, and ensuring the reliability of a device. Moreover, a high-performance switch tube or more switch tubes connected in parallel are not required to be used as in the prior art, so that the size and the weight of the system are reduced, and the costs are saved.

Classes IPC  ?

• H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

The present application discloses a multi-channel grid-connected power generation system and a control method therefor, which lowers the system cost while reducing no-load losses of all step-up transformers. Multi-channel energy conversion devices in the system are each connected in parallel, by means of a step-up transformer, to the same collector line, one end of the collector line is connected to the grid by means of a switch device, and the on-off switching of the switch device is controlled by a control unit. The control unit sends a switch-off command to the switch device when same has determined that all of the energy conversion devices have entered a non-operating state. In the off state of the switch device, at least one energy conversion device, when meeting a start condition, starts to operate as a voltage source, and establishes an alternating-current voltage, so that the phase difference and amplitude difference of voltages at two ends of the switch device are both stable within an allowable error range. Then, the control unit sends a switch-on command to the switch device, and the other energy conversion devices start to operate as a current source to transfer energy to the grid.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

A multi-channel alkaline hydrogen production system. By means of the liquid outlets of a hydrogen alkali treatment unit and an oxygen alkali treatment unit, a circulating alkaline liquid is outputted to an alkaline liquid circulating pump and at least one controllable channel that is connected to the alkaline liquid circulating pump in parallel, and then the circulating alkaline liquid is returned to the negative electrode of an electrolyzer; thus, a controller can control the amount of produced hydrogen according to the measured current of the electrolyzer, then calculates a corresponding alkaline liquid circulation volume reference value according to the amount of produced hydrogen, and according to the alkaline liquid circulation volume reference value, adjusts the circulation amount of the alkaline liquid of the multi-channel alkaline hydrogen production system and changes the gas purity of the multi-channel alkaline hydrogen production system by controlling the working states of the controllable channels on the two ends of the alkaline liquid circulating pump. The present invention solves the problems that the purity of the produced hydrogen is low and the production of hydrogen is stopped when the electrolyzer is powered by a renewable energy system and the renewable energy system operates in a trough, so that the electrolyzer is always in a full-load operating state and is not limited in a specific load range, thereby being suitable for the hydrogen production system powered by the renewable energy system.

Classes IPC  ?

• C25B 1/02 - Hydrogène ou oxygène
• C25B 1/04 - Hydrogène ou oxygène par électrolyse de l'eau
• C25B 9/00 - PROCÉDÉS ÉLECTROLYTIQUES OU ÉLECTROPHORÉTIQUES POUR LA PRODUCTION DE COMPOSÉS ORGANIQUES OU MINÉRAUX, OU DE NON-MÉTAUX; APPAREILLAGES À CET EFFET Éléments de structure des cellules; Assemblages d'éléments de structure, p.ex. assemblages d'électrode-diaphragme; Caractéristiques des cellules relatives aux procédés
• C25B 15/02 - Commande ou régulation des opérations
• C25B 15/023 - Mesure, analyse ou test pendant la production électrolytique

Abrégé

Provided are a rapid turnoff method, a photovoltaic assembly turnoff device, and a photovoltaic system. The rapid turnoff method comprises: after receiving a start signal, a photovoltaic assembly turnoff device controls itself to be turned on, so that a photovoltaic assembly connected thereto achieves electric energy output; then, the photovoltaic assembly turnoff device can measure a state parameter thereof to determine whether a corresponding inverter channel in a photovoltaic system has a fault; if the corresponding inverter channel in the photovoltaic system has the fault, control the photovoltaic assembly turnoff device to be turned off, so that the photovoltaic assembly connected thereto stops the electric energy output; if the corresponding inverter channel in the photovoltaic system has no fault, always keep the photovoltaic assembly turnoff device to be turned on. Therefore, there is no need for a central controller to continuously send signals or pulses to control the turnon of the photovoltaic assembly turnoff device.

Classes IPC  ?

• H02H 7/122 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour redresseurs pour convertisseurs ou redresseurs statiques pour onduleurs, c. à d. convertisseurs de courant continu en courant alternatif
• H02H 1/04 - Dispositions pour prévenir la réponse à des conditions transitoires anormales, p.ex. à la foudre
• H02S 50/00 - Surveillance ou tests de systèmes PV, p.ex. équilibrage de charge ou identification des défauts
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

A medium-voltage photovoltaic grid-connected inverter system and a photovoltaic power generation system. The photovoltaic power generation system comprises a plurality of medium-voltage photovoltaic grid-connected systems. The medium-voltage photovoltaic grid-connected inverter system comprises: a photovoltaic inverter (10), wherein a direct-current input end of the photovoltaic inverter (10) is connected to a direct-current bus; a medium-voltage transformer (20), wherein a low-voltage side of the medium-voltage transformer (20) is connected to an alternating-current output end of the photovoltaic inverter (10); a ring network switch (K10), wherein an input terminal of the ring network switch (K10) is connected to a high-voltage side of the medium-voltage transformer (20), and each phase of the ring network switch (K10) is provided with two output terminals, each of which is connected to a ring network switch (K10) of another medium-voltage photovoltaic grid-connected system; and an inverter grid-connected controller (30) connected to a controlled end of the ring network switch (K10), wherein the inverter grid-connected controller (30) is used for controlling the turning-off/turning-on of the ring network switch (K10) to realize grid disconnection/grid connection. Thus, medium-voltage grid connection of a photovoltaic inverter system can be realized insofar as a ring main unit is canceled.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe

Abrégé

Provided are a data transceiving control method and an application system therefor. The data transceiving control method comprises: initializing a point-to-point communication system, so that all communication units are in a data receiving state; a communication host controlling, according to a communication state in the point-to-point communication system, a controlled electrical connection path between the communication host itself and a corresponding communication interface of a communication transmission path to enter a corresponding working mode, so that data sent by a communication slave can be transmitted to a communication host side of the controlled electrical connection path, or data of the communication host side of the controlled electrical connection path can be transmitted to the communication slave. Therefore, data transceiving moments of two sides of a communication transmission path are controlled by means of a communication host, thereby realizing orderly data transceiving of all communication units, and no extra hardware control unit needs to be added for scheduling, thereby preventing a corresponding increase in costs.

Classes IPC  ?

• H04B 10/25 - Dispositions spécifiques à la transmission par fibres
• H04B 10/40 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p.ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p.ex. les communications quantiques Émetteurs-récepteurs

Abrégé

The present invention provides a photovoltaic system and a communication method therefor. The communication method comprises: each slave sends a report signal to a host, and monitors a response signal of the host; and if the at least one slave receives the response signal, the corresponding slave executes a corresponding action on the basis of the response signal. Therefore, communication between the host and each slave is achieved in a mode that each slave actively sends the report signal, the host is prevented from adopting a roll call query mode, and occupation of bus resources by the host is reduced.

Classes IPC  ?

• H04L 12/403 - Réseaux à ligne bus avec commande centralisée, p.ex. interrogation
• H04L 12/40 - Réseaux à ligne bus
• H04B 3/54 - Systèmes de transmission par lignes de réseau de distribution d'énergie

Abrégé

Disclosed are a radiator and an electrical device. The radiator comprises a heat dissipation substrate and a heat dissipation assembly, wherein the heat dissipation substrate is provided with an installation position for installing the heat dissipation assembly, the installation position is provided with a stress release groove, and the heat dissipation assembly is welded on the installation position. According to the radiator provided in the present application, the stress release groove is provided in the installation position for installing the heat dissipation assembly on the heat dissipation substrate, such that the installation position is isolated from the connecting position of the heat dissipation assembly to form an island structure, and the island structure reduces stress pulling caused by thermal deformation of the two materials of the heat dissipation assembly and the radiator, such that the reliability of the heat dissipation assembly is improved, the heat dissipation effect of the radiator is guaranteed, and meanwhile the aging life of the heat dissipation assembly is prolonged.

Classes IPC  ?

• H05K 7/20 - Modifications en vue de faciliter la réfrigération, l'aération ou le chauffage

Abrégé

A new energy composite hydrogen production system and a control method therefor. The new energy composite hydrogen production system comprises: a new energy power generation system (10), a power conversion system (20), an alkali liquid hydrogen production system (30), and a non-alkali liquid hydrogen production system (40). An output end of the power conversion system (20) is connected to an input electrode of the alkali liquid hydrogen production system (30) and an input electrode of the non-alkali liquid hydrogen production system (40), respectively, so that the power conversion system (20) can, according to the quantity of energy outputted by the new energy power generation system (10), choose to provide hydrogen production energy to the alkali liquid hydrogen production system (30) or the non-alkali liquid hydrogen production system (40). Furthermore, the non-alkali liquid hydrogen production system (40) can replace battery energy storage so as to implement energy reception in a weak energy region, thereby avoiding the waste of energy and improving the economic benefits of hydrogen production.

Classes IPC  ?

• C25B 15/02 - Commande ou régulation des opérations
• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

The present invention provides a driver circuit of a power conversion device and an application device thereof. The driver circuit comprises: at least one power supply switching circuit, N isolation modules, and at least one isolation power supply. A power supply sequentially provides drive voltages for the isolation modules by means of the power supply switching circuit and a corresponding isolation power supply. Output ends of the isolation modules are respectively connected to control ends of corresponding power semiconductor devices by means of corresponding drive resistors. The power supply switching circuit is used for changing an output thereof according to a drive voltage control signal received by a control end of the power supply switching circuit, so that the drive voltages of the isolation modules are equal to normal voltages when the power conversion device is in a normal operating state, and are equal to preset voltages when the power conversion device is in a transient transition process so as to avoid the risk of the damage to the power semiconductor devices. Moreover, it is unnecessary to permanently adjust resistance values of the drive resistors, and the influence on the performance during the normal operation of the power conversion device is avoided.

Classes IPC  ?

• H02M 1/08 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques

Abrégé

Disclosed in the present invention are a transformer and a transformer machining process, comprising two coil units arranged side-by-side, each unit comprising an inner coil and an outer coil sleeved on the outside of the inner coil, an outer coil semi-conductive layer being wrapped on the outside of the outer coil and an inner coil semi-conductive layer being wrapped on the outside of the inner coil, and an insulating layer being integrally cast with the coil unit. In the transformer provided by the present application, the arrangement of the outer coil semi-conductive layer and the inner coil semi-conductive layer can effectively improve the problem of excessive local field strength caused by an irregular coil structure and solve the issue of wire package cracking caused by steel material generating heat in a pouring body; thus, the transformer provided by the present invention has improved safety.

Classes IPC  ?

• H01F 27/32 - Isolation des bobines, des enroulements, ou de leurs éléments
• H01F 41/12 - Isolement d'enroulements

Abrégé

The present invention provides a direct-current coupling hydrogen production system and a control method therefor. A first converter supplies hydrogen production electric energy to a hydrogen production tank system only when output electric energy of a new energy system of the hydrogen production system is greater than a preset threshold; and a second converter performs grid-connected output by means of a conversion device when the output electric energy of the new energy system is less than or equal to the preset threshold. Therefore, even if a hydrogen production tank of the hydrogen production tank system of the hydrogen production system is a lye electrolytic cell, by means of the principle above, new energy power can be utilized to the maximum, and the minimum current/voltage restriction requirements of the lye electrolytic cell can be met, without introducing battery energy storage, thereby avoiding the problem of poor economy caused by the setting of battery energy storage.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs

Abrégé

Provided are a grounding detection method and a device using same. The grounding detection method is applied to a controller in a PWM-control-type grid-connected inverter in a low-voltage power grid system, and comprises: when a PWM-control-type grid-connected inverter satisfies a grounding detection condition, first controlling a grounding power supply in the PWM-control-type grid-connected inverter to apply a preset current or a preset voltage between a preset position and the ground (S200), wherein the preset position is a pole of a direct-current bus in the PWM-control-type grid-connected inverter or an output end of an alternating-current-side coupling circuit; and then determining whether the voltage of a pole of the direct-current bus or the output end of the alternating-current-side coupling circuit with respect to the ground changes (S300), so as to determine whether the PWM-control-type grid-connected inverter is sufficiently grounded, thus realizing automatic detection of a grounding condition of the grid-connected inverter, thereby solving the problem in the prior art of the dependence on manual work.

Classes IPC  ?

• G01R 31/52 - Test pour déceler la présence de courts-circuits, de fuites de courant ou de défauts à la terre

Abrégé

A flying capacitor-type NPC three-level topology, comprising: two half-busbar capacitors (Cd1, Cd2) and at least one bridge arm (210). The bridge arm (210) comprises: a flying capacitor (Css), two inner transistor units (S2, S3), two outer transistor units (S1, S4), and two clamping diodes (Dc1, Dc2), wherein the capacitance of the flying capacitor (Css) is greater than a specific value. Since the flying capacitor (Css) has a clamping effect on the two inner transistor units (S2, S3) and the capacitance of the flying capacitor (Css) is large, voltage fluctuations of the flying capacitor would not cause overvoltage of switching transistors (340) no matter what type of short circuit fault occurs, thereby preventing the switching transistor units (S1-S4) from being damaged due to overvoltage and further improving the security of a circuit.

Classes IPC  ?

• H02M 7/483 - Convertisseurs munis de sorties pouvant chacune avoir plus de deux niveaux de tension
• H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
• H02H 7/10 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour redresseurs

Abrégé

A DC coupling off-network hydrogen production system and a power supply device for a control cabinet thereof and a control method. When the output power of a new energy power system (101) meets the power demand of the control cabinet in a hydrogen production groove system (105), the power supply device supplies power to the control cabinet via a uni-directional converter by converting the output electric energy of the new energy power system (101); and when the output power of the new energy power system (101) does not meet the power demand of the control cabinet, the power supply device supplies power to the control cabinet via a bi-directional converter with the power of an energy storage device. The control method eliminates dependency on power grid and avoids the arrangement of cables and box-type substations required by picking power from a high pressure power grid, thereby reducing system cost.

Classes IPC  ?

• H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
• H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
• C25B 1/06 - Production électrolytique de composés inorganiques ou de non-métaux d'hydrogène ou d'oxygène par électrolyse de l'eau dans des cellules à électrodes plates ou planes