For the shorts of the output of photovoltaic power generation system，the complementary characteristics of battery and supercapacitor energy storage system to photovoltaic power generation system is utilized to composed the microgrid system with photovoltaic power generation，battery and supercapacitor． A control strategy based on DC bus voltage balance is proposed to achieve the fast response of battery and supercapacitor． Finally，the simulation model of microgrid is established with Matlab /Simulink simulation software，and the simulation results verify the superiority and validity of the proposed control strategy．