Target control management of energy storage power sources

　　1) Target control: For example, a certain range of power variation targets can be set for microgrid grid connection points to reduce power exchange fluctuations between microgrids and power grids, and improve electrical safety and reliability.

　　2) Power quality monitoring, analysis, and governance: Through the power quality related equipment installed in the microgrid, such as active filters and energy management systems, the power quality indicators in the microgrid can be monitored, and control commands can be formed based on various technical data to guide the actual operation of the power quality governance equipment.

　　a) The low valley electricity price period can be set, and the energy management cabinet controls the AC power to charge the battery through the energy storage inverter. When the battery is fully charged, the energy storage inverter stops charging the battery and enters standby mode;

　　b) During peak electricity pricing periods, the battery can be used to supply power to the load through an energy storage inverter. When the battery's capacity is released to the set lower limit, the energy management cabinet sends a shutdown command to the energy storage inverter to protect the battery and ensure that it has a certain amount of emergency backup power for mains power outages; Level based alarm control status;

　　c) When the mains power stops working, the energy management cabinet sends a shutdown command to the energy storage inverter and disconnects the grid side switch. The energy storage inverter restarts in VF mode to establish grid voltage, and the battery supplies power to the load through the energy storage inverter;

　　d) After the mains power returns to normal, the energy management cabinet sends a shutdown command to the energy storage inverter and closes the grid side switch. The energy storage inverter restarts grid connected operation in PQ mode.

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