Abstract: A photovoltaic connector includes 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, the area on 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, the area on the box that is occupied by the photovoltaic connector is reduced, thereby reducing the overall size of the box.

Abstract: A noise reduction assembly includes an outer frame and a partition plate. An accommodating cavity is arranged in the outer frame; the partition plate is arranged in the accommodating cavity, and the partition plate and the outer frame form a noise reduction channel, the noise reduction channel includes a first noise reduction section, a second noise reduction section and a third noise reduction section that are communicated in sequence, and the channel cross-sectional areas of the first noise reduction section and the third noise reduction section are both smaller than the channel cross-sectional area of the second noise reduction section. The technical solution of the present application may reduce the noise of a new energy equipment having the noise reduction assembly during operation.

Abstract: An electronic element and a high-frequency winding thereof are provided. At least one power transmission line of the high-frequency winding is a multi-layer stranded wire, the multi-layer stranded wire includes at least two stacked layers of cables, and each layer of the cables includes multiple 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 includes cross sections of multiple layers of cables, which layers are stacked in a first direction, the cross section of each layer of the cables includes cross sections of multiple cables, which are sequentially arranged in a second direction, and the first direction is perpendicular to the second direction.

Abstract: A battery module, and an energy storage system and a control method therefor. When a corresponding preset condition is satisfied, battery modules can be switched in or out of a system by means of the on-off of a main loop on-off control circuit and a bypass on-off control circuit, so that the battery modules currently connected into the system can be adjusted in real time, and thus the battery modules in the system can satisfy the corresponding preset condition one by one, namely achieving the same state (for example, achieving SOC equalization), without causing energy waste. Moreover, a main loop buffer circuit or a bypass buffer circuit is provided in the battery module, so that energy impact generated when the battery module is switched in or cut out of the system can be absorbed.

Abstract: A highly integrated mobile energy storage system is provided, which includes a container and battery racks. The battery racks are arranged in two rows along a length direction of the container, and the two rows of the battery racks are arranged back to back. For each of the two rows of battery racks, a maintenance door is arranged at a wall of the container close to the row of battery racks. In a case that a battery rack needs to be maintained, it is just required to open the maintenance door to maintain the battery rack. Since the two rows of battery racks are arranged back to back, no maintenance passage is required, thereby reducing a floor space along a width direction of the container, thus reducing the floor space of the system.

Abstract: A capacitor structure and a power converter are provided. The capacitor structure includes a parallel cell combination, and the parallel cell combination includes a plurality of cells and a plurality of current collectors. In the parallel cell combination: the cells are connected in parallel, and the poles connected in parallel are respectively connected with other devices through corresponding confluence points. Same poles of two adjacent cells are connected through a corresponding current collector, and the current-carrying specifications of each current collector is lower than the current-carrying requirements of a confluence point of a corresponding pole. That is to say, a conductor that implements the parallel connection of the cells is no longer a whole copper plate, but the individual current collectors, thus realizing the reduction of the cost of the conductor material.

Abstract: 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.

Abstract: An electrical device includes a box body and multiple hanging members. Components are provided outside the box body; the handing members are respectively fixed to the components, 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 components outside the box body instead of being directly mounted on the box body. An electrical device hanging system and a photovoltaic power station having the electrical device are further provided.

Abstract: A fault detection method and a fault protection method for a power conversion system, and a power conversion system are provided, which relate to the technical field of fault detection for circuits. The fault detection method includes: controlling, when the power conversion system operates in a reactive mode, an alternating current pre-charge power supply to operate to charge a bus capacitor of the power conversion system, where the bus capacitor supplies power to a digital signal processor (DSP) through a first switch power supply (SPS), determining whether the DSP is energized to obtain a first determination result, and determining that the bus capacitor is short-circuited if the first determination result indicates that the DSP is de-energized. According to the present disclosure, when the bus capacitor of the power conversion system is short-circuited, the short-circuit fault of the bus capacitor can be detected.

Abstract: A method for controlling data transmission and reception and an application system thereof are provided. In the method, the peer-to-peer communication system is initialized to set each communication unit in the peer-to-peer communication system to be in a data receiving state. A communication host controls, according to a communication status of the peer-to-peer communication system, a controlled electrical connection path between the communication host and a communication interface to the communication transmission path, to work in a mode allowing data transmission from the communication slave to a communication host side of the controlled electrical connection path, or a mode allowing data transmission from the communication host side of the controlled electrical connection path to the communication slave.

Abstract: A renewable energy charging system, an alternating current charging station and a charging method applied to the alternating current charging station are provided. The method includes: measuring an available input power of a system where the alternating current charging station is arranged when the alternating current charging station is operating in a power tracking mode; controlling the alternating current charging station to supply single-phase power to an electric vehicle through a charging gun of the alternating current charging station when the measured available input power is greater than or equal to a single-phase threshold and less than a three-phase threshold, where the single-phase threshold is less than the three-phase threshold; and controlling the alternating current charging station to supply three-phase power to the electric vehicle through the charging gun when the measured available input power is greater than or equal to the three-phase threshold.

Abstract: A photovoltaic system, an inverter starting method and a photovoltaic energy storage system are provided. The photovoltaic system includes: a shutdown device, a controller and an inverter. The inverter includes a DC-DC circuit and an inverter circuit; the DC-DC circuit includes at least two Boost circuits; an input terminal of the shutdown device is connected to a photovoltaic panel, and an output terminal of the shutdown device is connected to an input terminal of the DC-DC circuit; an output terminal of the DC-DC circuit is connected to an input terminal of the inverter circuit. The method includes: controlling the inverter to perform a start-up process in multiple stages in a case that a start-up time of the inverter is greater than a single turned-on period of the shutdown device, where the shutdown device is turned on once in each of the multiple stages.

Abstract: A rapid shutdown system and a method for controlling the rapid shutdown system are provided. A disturbance is applied to a direct-current side of an inverter in the rapid shutdown system only when the inverter does not meet a starting condition, i.e., before the inverter starts. Once meeting the starting condition, the inverter normally operates. A shutdown device in the rapid shutdown system determines its state by determining whether the electrical signal at its output end meets the preset condition, and switches itself on or off in response to its determination.

Abstract: A cascaded power electronic transformer and a method for controlling the same are provided. The method includes: calculating electrical angles ?i1 and ?kps of an sth transformer and a compensation electrical angle ?j of a jth transformer; adding the compensation electrical angle ?j to the electrical angle ?kps of the jth transformer, to obtain a compensated electrical angle ?kps of the jth transformer; and calculating a square wave of a bridge arm voltage of each of the m primary converters and the r secondary converters of the sth transformer based on the electrical angle ?i1 and the electrical angle ?kps of the sth transformer after compensation.

Abstract: A battery module includes multiple battery units sequentially arranged along a thickness direction and a protection assembly. The battery unit includes a housing having an accommodation cavity, and a battery cell is arranged in the accommodation cavity. The protection assembly is provided between two adjacent battery units, where one end of the protection assembly is located in an accommodation cavity of one of the two adjacent battery units, the other end of the protection assembly is located in an accommodation cavity of the other one of the two adjacent battery units. The protection assembly is a hollow structure, and the accommodation cavities of the two adjacent battery units are communicated by the protection assembly, where a connecting wire passes through the protection assembly.

Abstract: A method and a device for detecting coverage in HIL testing, and a computer-readable storage medium are. The method includes: acquiring an HIL test case and performing HIL testing on a controller based on the HIL test case; for each of functions in code of the controller, detecting a preset mark of the function and acquiring statistical data about the detected preset mark during the HIL testing; and determining coverage of the HIL test case on the functions based on the statistical data about the preset marks. Both the determination of execution and functionality of the function in the code based on the HIL test case as well as the determination of the coverage of the HIL test case based on the execution of the function in the code are performed during the HIL testing.

Abstract: An inverter and an inverter system. The inverter includes 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 includes 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.

Abstract: An operation control method and device for a battery cluster and a related apparatus are provided. The method includes: determining whether a battery cluster which is fault-free and offline in an energy storage system meets a charging condition; determining whether a bus voltage of the energy storage system is greater than or equal to a voltage of the battery cluster if the battery cluster meets the charging condition; determining whether the battery cluster meets a switching-in condition if the bus voltage of the energy storage system is greater than or equal to the voltage of the battery cluster; and connecting the battery cluster to the energy storage system if the battery cluster meets the switching-in condition.

Abstract: A medium-voltage grid-connected photovoltaic inverter system includes: a photovoltaic inverter, a medium-voltage transformer, a medium-voltage switch, and an inverter grid-connected controller. A direct current input terminal of the photovoltaic inverter is connected to a direct current bus. A low-voltage side of the medium-voltage transformer is connected to an alternating current output terminal of the photovoltaic inverter. An input terminal of the medium-voltage switch is connected to a high-voltage side of the medium-voltage transformer, and an output terminal of the medium-voltage switch is configured to be connected to a medium-voltage grid. A current sensor is integrated in the medium-voltage switch to detect a grid-connected current of the photovoltaic inverter system and output a current detection signal.

Abstract: 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.