In order to solve the problem of voltage instability caused by the instability and intermittentity of wind power generation, Considering to the advantages of FACTS technology. This paper proposes a method to combine the Unified Interphase Power Controller (UIPC) and the Static Synchronous Compensator (STATCOM) into the wind power grid-connected system to improve the transient voltage stability of the grid-connected system. The method connects the Unified Interphase Power Controller in series with the connection line between the wind farm and the power grid, and connects the STATCOM to the bus line of the wind farm. UIPC adjusted using the flow between the wind farm power grid, and to limit short circuit current in the system short-circuit failure, thereby reducing the degree of short-circuit fault occurs in the bus voltage drop. STATCOM is used for reactive power compensation in order to restore voltage in time. The corresponding simulation model results show that UIPC and STATCOM are connected to the wind power grid-connected system, which will greatly enhance the system voltage stability.