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PRS-7563 Series Energy Storage Converter (PCS) and its optional parts are the link between power grid and electric energy storage equipment, It realizes the mutual transformation between AC power and DC power, monitors the voltage, current, power, temperature and other data of AC terminal and DC terminal of energy storage converter, shoulders the functions of charging and power feedback, and is one of the key equipment in the energy storage system, which provides a prerequisite for the vigorous development of distributed generation system. In addition, a PCS, as a controllable energy storage power supply unit in a microgrid, solves the contradiction between large power grid and distributed power supply, so that the microgrid can not only operate when it is connected to the large grid connected, but also can operate when it is disconnected from the main grid when the main grid fails or as needed, greatly improving the security, stability and cost-effectiveness of the power system.