Distributed photovoltaic power generation system, also known as distributed power generation or distributed energy supply, refers to the configuration of smaller photovoltaic power supply systems at or near the user site to meet the specific needs of users, support the economic operation of existing distribution networks, or meet both requirements simultaneously. The basic equipment of a distributed photovoltaic power generation system includes photovoltaic cell modules, photovoltaic array brackets, DC combiner boxes, DC distribution cabinets, grid connected inverters, AC distribution cabinets, etc. In addition, there are power supply system monitoring devices and environmental monitoring devices. Its operating mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the solar energy into output electrical energy, which is centrally sent to the DC distribution cabinet through the DC combiner box. The grid connected inverter inverts the AC power to supply the building's own load, and the excess or insufficient power is regulated by connecting to the power grid.