Abstract: Aiming at the voltage fluctuation of common connection point caused by the reactive power output fluctuation of a large number of wind turbines in a large number of wind farms, a distributed voltage control method based on cloud edge collaborative architecture is proposed. Firstly, in the cloud side collaborative architecture, several wind turbines are divided into clusters, and edge computing devices are configured in each cluster. The right cloud controller regulates and controls the edge computing devices uniformly. Then, in the cloud control center, the optimal set value of H∞ effect of reference reactive power output on voltage fluctuation is derived by constructing Lyapunov functional, and the reference reactive power output of each wind turbine cluster is generated. Finally, on the edge side, the distributed cooperative control strategy based on consensus algorithm is used to realize the real-time power control of the underlying wind turbines. The simulation results of wind farm based on Simulink show that the overshoot of the proposed method is about 38%, the response speed is longer and the control performance is better than that of the traditional centralized control method and the fully decentralized consistent control method.