Aimed at the stability problem of distribution network (microgrid) caused by “low inertia and underdamping”, while distributed power integrated in, such as wind energy, photovoltaic, energy storage and so on, virtual synchronous generator (VSG) simulated synchronous generator characteristic had been studied. Based on the droop control, the converter power electronic device would have synchronous generator rotor inertia and damping characteristics by the design of the electromagnetic equation and the mechanical equation, so it had the capability of primary frequency and voltage regulation. In view of the contradiction between dynamic and steady state characteristics of VSG output power, an improved VSG scheme was proposed. Finally, the correctness and effectiveness of the proposed model and control strategy were verified by MATLAB/Simulink simulation.