Aiming at using the energy storage to improve the friendliness of wind power to its grid system, a strategy based on energy storage to stabilize the wind power output fluctuations is given. A regional power grid load and wind power output data of large-scale wind power grid are counted and analyzed, the time-domain distribution law of load and wind power output is obtained, the strategy using energy storage to coordinate active power output of the wind farm and load power fluctuations of its power grid system is proposed, and the corresponding mathematical model is established. The simulation is made based on the power system analysis software DIgSILENT-POWERFACTORY13.1. The results show that the modified active power output of wind power through using energy storage can track the load curve variation, the synthesizer output of grid-connected wind power energy storage on the power system can play the role of “load shifting”, and energy storage improves the friendliness of wind power to its grid system at a lower cost.