Abstract: In order to solve the impact of wind power output fluctuation on the power grid, a hybrid energy storage system composed of lithium iron phosphate battery and super capacitor is proposed to stabilize. Firstly, the adaptive moving average algorithm is used to decompose the output power of wind power, and the power that needs to be stabilized for grid connected power and hybrid energy storage is obtained. Then, the modal number K and penalty coefficient α in VMD algorithm are optimized by POA, and then the hybrid energy storage power is decomposed through VMD to realize the internal power distribution of hybrid energy storage. The example analysis shows that the proposed method can effectively suppress the fluctuation of wind power, ensure the reasonable internal power distribution of hybrid energy storage, and extend the service life of hybrid energy storage system.