Abstract: The present application discloses an energy storage cabinet, including a battery management module and a battery assembly. The battery management module is located on the side wall of the battery assembly, and the battery management module is electrically connected to the battery assembly. In the energy storage cabinet according to the present application, because the battery management module is located on the side wall of the battery assembly, the mounting height of the battery management module is effectively reduced, which is convenient for workers to control the battery management module, further facilitates the operation of the energy storage cabinet, and improves the safety of workers operating the energy storage cabinet.

Abstract: A photovoltaic power generation system and a control method therefor, and a power converter are provided. The control method includes: obtaining MLPE state characterization information of the photovoltaic string; determining, based on the MLPE state characterization information, whether there is at least one MLPE device that fails to be in a normal output state; and if so, controlling a corresponding string current to be less than a preset threshold. Therefore, the power consumption of corresponding MLPE devices in the bypass operation state is reduced, allowing the MLPE devices to adopt a diode with a lower power capacity and a heat dissipation design with a lower heat dissipation requirement, and saving system costs.

Abstract: A stacking power supply cabinet is provided. The stacking power supply cabinet includes a top assembly and at least one battery module. In a case that the number of the battery module is more than one and the multiple battery modules are stacked sequentially from top to bottom, an electric connection path for power supply and/or storage is established among the stacked multiple battery modules, and the electric connection path is conducted via a power transmission line in the top assembly, and then the battery modules are charged. Thus, in the installation process of the power supply cabinet, the electric connection path for the power supply and/or storage among the multiple stacked battery modules is uncharged before the top assembly is installed, thereby reducing the risk of electric shock to the human body and improving the safety during the installation process of the stacking power supply cabinet.

Abstract: An inverter and a method for identifying a fault on an alternating current side of a photovoltaic system are provided. A controller records a waveform of a preset parameter of the photovoltaic system, and then transmits the recorded waveform to an external device. The external device that performs relatively excellently in data storage and processing stores the waveform and performs subsequent processing, to accurately recognize the fault on the alternating current side of the inverter. Further, the fine waveform can be seen from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device analyzes the waveform and generates a control instruction to accurately control the inverter due to advantages of storage capacity, big data, and computing power. In addition, system performance can be optimized in cooperation with a local control unit.

Abstract: A photovoltaic power generation system and a control method therefor, and a power converter are provided. The control method includes: obtaining MLPE state characterization information of the photovoltaic string; determining, based on the MLPE state characterization information, whether there is at least one MLPE device that fails to be in a normal output state; and if so, controlling a corresponding string current to be less than a preset threshold. Therefore, the power consumption of corresponding MLPE devices in the bypass operation state is reduced, allowing the MLPE devices to adopt a diode with a lower power capacity and a heat dissipation design with a lower heat dissipation requirement, and saving system costs.

Abstract: An IV curve scanning method and an IV curve scanning device for a multi-input converter are provided. For each of input converters in the multi-input converter, a starting scanning voltage, a starting scanning moment, and scanning voltages at respective target scanning points are so determined based on a preset starting voltage, a minimum voltage and a preset number of the target scanning points that at each of the target scanning points there is at least one of the input converters whose scanning voltage is greater than a target voltage. The IV curve scanning for the input converter is performed based on the starting scanning voltage, the starting scanning moment, and the scanning voltages at respective target scanning points.

Abstract: A wiring structure and an electrical box are provided. The wiring structure includes a first mounting member and a second mounting member, 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.

Abstract: An inverter and a direct-current switch assembly are provided. 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.

Abstract: A PV terminal assembly includes 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, 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. An electrical device includes the PV terminal assembly.

Abstract: Provided are a method for controlling operation of a module level power electronics (MLPE) device, a method for controlling MLPE devices and a photovoltaic system. In the method for controlling operation of a MLPE device, if it is determined that a current of a photovoltaic string where the MLPE device is located is less than a current threshold and coding information sent by a converter in the photovoltaic system is not received for a first preset time period, an output voltage or an output power of the MLPE device is controlled to be less than a corresponding threshold.

Abstract: An inverter and a method for identifying a fault on an alternating current side of a photovoltaic system are provided. A controller records a waveform of a preset parameter of the photovoltaic system, and then transmits the recorded waveform to an external device. The external device that performs relatively excellently in data storage and processing stores the waveform and performs subsequent processing, to accurately recognize the fault on the alternating current side of the inverter. Further, the fine waveform can be seen from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device analyzes the waveform and generates a control instruction to accurately control the inverter due to advantages of storage capacity, big data, and computing power. In addition, system performance can be optimized in cooperation with a local control unit.

Abstract: A photovoltaic system, a method for locating devices in a photovoltaic string, a MLPE apparatus, and a method for ranking MLPE apparatuses. Each MLPE apparatus sends, actively according to a predetermine rule, an initial message to the other MLPE apparatuses. The initial message includes a serial number corresponding to said MLPE apparatus and an accumulated operation duration of said MLPE apparatus. The MLPE apparatuses determine the rank of the accumulated operation duration of each MLPE apparatus according to the initial messages sent from all MLPE apparatuses. After each MLPE apparatus communicates with a communication host, the MLPE apparatuses reports the rank of the accumulated operation duration of each MLPE apparatus to the communication host. Thereby, the communication host may determine a physical location of each device in the photovoltaic string according to the ranks of the accumulated operation durations and a sequence of installing positions of the devices in the photovoltaic string.

Abstract: An intelligent switch device and a power generation system are provided. The intelligent switch device includes a first power port, a second power port, a switch unit and a control unit. A first end of a switch unit is connected to a first power supply via a first power port, and a second end of the switch unit is connected to a second power supply via a second power port. The control unit is configured to control the switch unit to be turned on for a first time period when the first power supply is in abnormal condition, where the abnormal condition causes the switch unit to be tripped. The first time period is greater than or equal to a time period required for a device to respond to the abnormal condition.

Abstract: A photovoltaic inverter, a photovoltaic system, and a method for controlling discharging are provided. The photovoltaic inverter includes a first DCDC converter, an inverter circuit, a first discharging circuit, and a controller. A port capacitor is connected between a positive input end and a negative input end of the first DCDC converter. The port capacitor includes an X capacitor and a first group of Y capacitors. The first discharging circuit is connected between a common terminal of the first group of Y capacitors and a direct current bus, where the common terminal of the first group of Y capacitors is grounded. The controller is configured to control, when receiving a rapid shutdown instruction, the first discharging circuit to operate. The first discharging circuit is configured to discharge electrical energy of the port capacitor.

Abstract: A photovoltaic system and a method for locating devices in a photovoltaic string. A communication host in the photovoltaic system acquires accumulated operation durations of MLPE apparatuses of the photovoltaic string, ranks the accumulated operation durations to obtain a ranking result, and determines a physical location of each device in the photovoltaic string according to the ranking result and a sequence of installing positions of the devices, where the devices are installed at the installing positions based on the sequence. It is not necessary to paste label codes on the MLPE apparatuses, or record serial numbers of the MLPE apparatuses by installation personnel. Operation processes are simplified, operation time is saved, and labor costs are reduced.

Abstract: A method for capacity expansion of an energy storage system and an energy storage system are provided. The method is applied to a controller in the energy storage system. The controller acquires a value of a characteristic parameter of a to-be-added second energy storage device as a target characteristic value. Then, the controller controls a charge/discharge power converter to charge or discharge first energy storage devices until a proximity of a value of a characteristic parameter of at least one first energy storage device to the target characteristic value is less than a preset proximity. Finally, a signal indicating that the second energy storage device is allowed to be connected into the energy storage system is generated and outputted to notify an operator.

Abstract: An intelligent switch device and a power generation system are provided. The intelligent switch device includes a first power port, a second power port, a switch unit and a control unit. A first end of a switch unit is connected to a first power supply via a first power port, and a second end of the switch unit is connected to a second power supply via a second power port. The control unit is configured to control the switch unit to be turned on for a first time period when the first power supply is in abnormal condition, where the abnormal condition causes the switch unit to be tripped. The first time period is greater than or equal to a time period required for a device to respond to the abnormal condition.

Abstract: A photovoltaic system and a method for locating devices in a photovoltaic string. A communication host in the photovoltaic system acquires accumulated operation durations of MLPE apparatuses of the photovoltaic string, ranks the accumulated operation durations to obtain a ranking result, and determines a physical location of each device in the photovoltaic string according to the ranking result and a sequence of installing positions of the devices, where the devices are installed at the installing positions based on the sequence. It is not necessary to paste label codes on the MLPE apparatuses, or record serial numbers of the MLPE apparatuses by installation personnel. Operation processes are simplified, operation time is saved, and labor costs are reduced.

Abstract: A photovoltaic system, a method for locating devices in a photovoltaic string, a MLPE apparatus, and a method for ranking MLPE apparatuses. Each MLPE apparatus sends, actively according to a predetermine rule, an initial message to the other MLPE apparatuses. The initial message includes a serial number corresponding to said MLPE apparatus and an accumulated operation duration of said MLPE apparatus. The MLPE apparatuses determine the rank of the accumulated operation duration of each MLPE apparatus according to the initial messages sent from all MLPE apparatuses. After each MLPE apparatus communicates with a communication host, the MLPE apparatuses reports the rank of the accumulated operation duration of each MLPE apparatus to the communication host. Thereby, the communication host may determine a physical location of each device in the photovoltaic string according to the ranks of the accumulated operation durations and a sequence of installing positions of the devices in the photovoltaic string.

Abstract: The present application discloses an energy storage cabinet, including a battery management module and a battery assembly. The battery management module is located on the side wall of the battery assembly, and the battery management module is electrically connected to the battery assembly. In the energy storage cabinet according to the present application, because the battery management module is located on the side wall of the battery assembly, the mounting height of the battery management module is effectively reduced, which is convenient for workers to control the battery management module, further facilitates the operation of the energy storage cabinet, and improves the safety of workers operating the energy storage cabinet.