Abstract: Virtual synchronous generator (VSG) in microgrid requires storage module to meet the needs of continuous power supply demand. It is vital to control the state of charge (SOC) of the storage module. To solve this problem, based on the traditional VSG control, SOC control section is added on the basis of proportional integral (PI) controller, and regulator parameter is established through pole assignment on the basis of small signal model, which makes the system a good dynamic performance. At last, the correctness and feasibility of the control strategy is verified by simulation.