The fluctuation and randomness of the output power of the wind power generation system have many adverse effects on the power grid, equipping a certain energy storage device in the wind power system can smooth power fluctuations effectively. In this paper, a hybrid storage system with battery storage and super capacitor is proposed to mitigate the fluctuation of wind power. The control strategy of the charge state feedback was proposed for the battery storage system to prevent battery storage system from working when the charge of charge reach the limit. The proposed control method compensates the shortage of the storage equipment for its own use.Finally, the validity of the method is verified by simulation.