Abstract: Any one of a plurality of to-be-grouped devices in a power supply system reports an initial bus voltage to a topology detection device; and reports a current bus voltage after delivering a bus voltage adjustment instruction to a target reference device. The bus voltage adjustment instruction instructs the target reference device to adjust a voltage. The target reference device receives the bus voltage adjustment instruction and adjusts the voltage according to the bus voltage adjustment instruction. The topology detection device obtains the initial bus voltage and the current bus voltage of the plurality of to-be-grouped devices, and determines, based on a difference between the initial bus voltage of the plurality of to-be-grouped devices and the current bus voltage of the plurality of to-be-grouped devices, whether the target reference device and a target to-be-grouped device are connected to a same bus.

Abstract: An image/video capture apparatus is provided, to capture image data of a photovoltaic panel (101) and surroundings, and a controller (502) recognizes a category corresponding to the image data, and generates different instructions to control rotation of a photovoltaic tracker (102), to remove dust or snow accumulating on the photovoltaic panel (101). This does not need continuous heating, but is simple and efficient, saves electric energy, and resolves a technical problem that a conventional snow removal method of heating has low efficiency and wastes electric energy. In addition, a corresponding controller (1200) is further provided.

Abstract: A common mode current controller of an inverter includes switches and an impedance correction circuit. One end of the impedance correction circuit is grounded, and the other end is connected to one end of each of the switches. The other end of each of the switches is connected to one of a positive terminal and a negative terminal of a direct current busbar capacitor. When a midpoint-to-ground voltage of the direct current busbar capacitor exceeds a threshold range, the switches are closed to adjust impedance matching between a positive terminal-to-ground equivalent impedance of the direct current busbar capacitor and a negative terminal-to-ground equivalent impedance of the direct current busbar capacitor.

Abstract: A direct-current electric arc detection method and apparatus, a device, a system, and a storage medium. The method includes: obtaining an electrical quantity of a direct current circuit; inputting the electrical quantity into a burning arc neural network model to perform burning arc detection on the direct current circuit, to obtain a burning arc detection result; and if the burning arc detection result is that a burning arc is detected, determining that a direct-current electric arc fault exists in the direct current circuit. Because the electrical quantity is input into the burning arc neural network model to perform burning arc detection on the direct current circuit, a direct-current electric arc fault is detected, and accuracy of detecting a direct-current electric arc fault is further improved.