The residential energy storage system is mainly composed of energy storage inverter, energy storage battery and other electrical equipment. Among them, the energy storage inverter includes energy storage converter (PCS) part and energy management system (EMS) part; the energy storage battery includes battery module (cell) and battery management system (BMS) part. The energy storage inverter is the control center of the Residential energy storage system. It needs to process various information transmitted from the rooftop photovoltaic power generation end, the Residential energy consumption load end, and the energy storage battery power end, and formulate control strategies according to different application scenarios; at the same time, the energy storage inverter also needs to realize the AC-DC conversion function, which not only controls the transmission of electric energy to the power grid, but also controls the charging and discharging process of the energy storage battery. The main function of the energy storage battery is to realize energy storage. Among them, the battery management system is the core component of the energy storage battery, and the technical barriers are relatively high. The core function of the battery management system is to monitor and control the battery charging and discharging process to ensure the use of battery stored energy under battery safety. At the same time, the energy storage inverter communicates with the battery management system through the CAN interface to obtain the energy storage battery status information, and sends control instructions to the energy storage battery, and actively controls and intervenes in the working status of the energy storage battery according to the needs of different application scenarios.
Application scenarios of Residential energy storage system The application scenarios of energy storage technology in the power system include the power generation side, the grid side and the power consumption side. The power generation side is mainly used in renewable energy power plants and traditional power stations, which can not only improve the power generation characteristics of renewable energy, smooth out power generation fluctuations, reduce wind and solar abandonment, improve the power generation quality and power generation safety level of power stations, but also assist the dynamic operation of traditional power stations; the grid side is mainly used for power auxiliary services, and frequency modulation, amplitude modulation and other measures are used to ensure the stable operation of the power grid; the power consumption side is mainly used for (family) Residential energy storage and industrial and commercial energy storage.
