Energy Storage System to Improve Flexible and Stable Operation of Microgrid in Grid-connected and Islanding Mode

This paper analyzes the wind and solar storage microgrid system including 2 MW wind turbines, 1 MW photovoltaic power generation system and 500 kWh energy storage battery system, and gives a control strategy for the energy management system to follow the load demand response to control the output of the energy storage battery system under grid-connected and islanded operation of the microgrid. The response characteristics of the microgrid subsystem under grid-connected operation and islanding operation are simulated and analyzed in MATLAB/Simulink environment. The results show that the control strategy proposed in this paper can maintain the power balance of the microgrid and realize the flexible and safe operation of the wind and solar storage microgrid.