The microgrid system is composed of solar cell arrays, grid-connected inverters, PCS bidirectional converters, intelligent switching switches, battery banks, generators, and loads. The solar cell array converts solar energy into electricity when there is sunlight, and supplies power to the loads through the inverter, while charging the battery bank through the PCS bidirectional converter; when there is no sunlight, the battery supplies power to the loads through the PCS bidirectional converter.

The microgrid can fully and effectively utilize the potential of distributed clean energy, reduce the disadvantages such as small capacity, unstable power generation, and low reliability of independent power supply, ensure the safe operation of the power grid, and is a beneficial supplement to the main power grid. The microgrid can promote the upgrading and replacement of traditional industries, and can play a huge role from the perspective of economy and environmental protection. Experts say that the application of the microgrid is flexible, and the scale can range from several kilowatts to several megawatts. It can be as large as factories, mines, hospitals, schools, and as small as a single building.