Abstract: In the process of applying energy storage system to smooth the wind power fluctuation, the energy storage system control strategy based on fuzzy logic control is proposed for improving the smoothing effect and prolonging the work life of the energy storage system. This control strategy can real-time adjust filter time constant of low-pass filter by using of fuzzy logic control method according to the output variation of the DFIG and the SOC of the battery. This control strategy can also stabilize the power fluctuations as much as possible, and keep the SOC of the battery within limits so that it can prevent the battery from overcharge and excessive discharge at the same time. The simulation results under the environment of SIMULINK show that the control strategy with fuzzy logic control can effectively reduce the changing rate of wind power and the battery's SOC.