Abstract: The DC microgrid with high-power wind and solar energy storage has the typical characteristics of "small inertia,weak damping". After the system is disturbed,it will cause the DC bus voltage to fluctuate violently. Therefore,this paper proposes an adaptive control strategy to improve the virtual inertia and damping parameters. Firstly,a voltage compensation link is added to the control of similar virtual synchronous generator to eliminate the voltage regulation static error caused by the control. Then the virtual inertia and damping parameters are made to respond to the DC voltage fluctuation adaptively,and the influence of the output power limitation of the converter is considered in the adaptive control of the virtual inertia,which not only suppresses the DC voltage fluctuation,but also takes into account the long-term safe operation of the converter. In order to ensure the reasonable selection of control parameters,this paper establishes a small signal analysis model of the control strategy,and analyzes the influence of the main parameters on the stability of the system by drawing the root locus diagram. Finally,the effectiveness of the improved control strategy proposed in this paper is verified by a simulation example.