Determine the functional positioning of the power storage system in the microgrid in accordance with the characteristics and the actual demand of the microgrid project, determine the optimized system topology, key equipment selection and operation control scheme according to the technical research of the program, and provide suggestions for installation and operation and maintenance optimization of power storage system. The technology can rationally configure the power storage system, reduce equipment investment, improve service life and operation efficiency of the equipment, and effectively improve the access capacity of micro grid to renewable and clean energy sources.