In order to reduce the adverse impact of wind power grid connection and improve the wind power consumption space,a hybrid energy storage system is added in the active distribution network with wind power output, and its configuration is optimized.Considering the influence of wind power random output on power flow, the mathematical model of wind power and energy storage connected to distribution network is established. The optimal allocation model of energy storage system is established with the objective of minimizing the active power loss, voltage deviation and investment cost. On this basis, the gray wolf algorithm is improved to solve the model. Taking IEEE 33 node system as an example, the optimal configuration scheme of energy storage system is obtained.The simulation results show that the proposed model and algorithm can effectively dispose the energy storage system, improve the overall economy and security, and increase the wind power consumption capacity of the system.