In order to better simulate the inertia of the synchronous generator and make full use of the advantages of different energy storage units,a virtual synchronous generator system with a hybrid energy storage unit composed of battery and ultracapacitor is studied and the mathematical model of the system is analyzed in detail.In the control strategy,taking into account the characteristics of the energy storage units themselves and the service life of the battery,a control strategy including battery SOC feedback is proposed.By setting up a corresponding MATLAB/SIMULINK simulation model,the system is analyzed in the normal state of charge and the SOC is reached.At the upper limit,the power distribution of the energy storage verified the correctness and effectiveness of the proposed control strategy.The results show that the proposed virtual synchronous generator system with battery SOC feedback control can achieve a reasonable power distribution when the power fluctuates,and prolongs the service life of the energy storage while maintaining the stability of the system.