Abstract: In order to solve the problems of power jump caused by direct switching between energy storage frequency regulation control modes in critical mode and the limitation of energy storage output caused by too high or too low State of Charge（SOC）of energy storage,an integrated control strategy of energy storage participating in primary frequency regulation based on fuzzy control is proposed.Firstly,the influence of energy storage virtual droop,virtual inertia and virtual negative inertia control parameters on the frequency response of the system is analyzed,and the frequency modulation advantage and stable variation range of each control parameter are determined;Secondly,a fuzzy controller with virtual negative inertia control is designed to realize smooth switching and complementary advantages between control modes and accelerate frequency recovery;Finally,the feedback control strategy of SOC and the selfrecovery control strategy of energy storage SOC are designed by using the logistics function,so that the energy storage capacity can be better maintained and the frequency modulation ability of energy storage can be improved. The effectiveness of the proposed strategy is verified by Matlab/Simulink simulation.