Abstract: The paper established mathematical model of blade pitch control, wind turbine and shaft system of wind power generation system of double-fed induction generator based on DIgSILENT／PowerFactory, and made simulation of the entire system. It also imitated operating of the entire system under variable active and reactive power and three-phase short circuit in grid. The simulation results indicated that the system realizes decoupling control of active power and reactive power and stable operation under three-phase short circuit in grid, and testifies validity of the models, which lays foundation for further research of modeling simulatiom of wind power field.