Aiming at the problem of poor reactive power regulation ability of wind farm, considering the complementary advantages of capacitor bank and condenser time scale, a reactive power compensation device configuration and multi-time scale scheduling method for optimizing the reactive power regulation ability of wind farm is proposed to ensure that wind farm has real-time reactive power regulation ability, and the voltage support ability of configuration scheme is analyzed. The results of the example show that the configuration results of the reactive power compensation device can optimize the reactive power regulation ability of the steady-state operation of the wind farm, and the condenser can effectively increase the short-circuit capacity of the grid-connected point, improve the system strength, alleviate the transient voltage drop and suppress the transient overvoltage.