In recent years, extreme weather occurs frequently, and the energy crisis is becoming more and more serious. The unified scheduling of new energy sources such as scenery can alleviate the problems of primary energy shortage. However, the randomness and fluctuation of new energy lead to its low internet access. Building an energy storage station for new energy generation side can not only solve the fluctuation problem of new energy grid connection, but also increase the grid connection of new energy sources. This article decomposes the output data of wind farm into high, medium and low frequency components through empirical mode decomposition. The low frequency component can be directly connected to the grid, battery could stabilize intermediate frequency component and and flywheel stabilize high frequency component.Combined with the objective function of minimum cost of the energy storage station, minimized capacity is carried out, and the economic optimal scheme is obtained.