Abstract: Aiming at the problem that the power supply quality of the microgrid needs to be improved and the large impact of grid connection, a new type of virtual synchronous generator (VSG) control strategy is proposed to control the microgrid inverter. First，introduce the VSG control strategy and design control block diagram. Second，second order equation of hidden-pole synchronous generator is deformed and decomposed vector，to establish the VSG control strategy based on synchronous impedance pressure drop model , stator voltage model and rotor motion equation model. Then ，improve a virtual speed regulation ,virtual excitation module , grid-connected control module of double feedback of voltage and phase angle, according to the frequency modulation and voltage regulating principal of generator. The relevant model is built on the simulation platform and the voltage, frequency and power under the same example of VSG and the droop control are compared at the moment of grid connection. The comparison results showed that the VSG control can better deal with the load changes with a small impact of the grid connection, verifying the effectiveness of the proposed control strategy.