Based on the vector control theory and proportional integral regulator series correction method， an electro-magnetic transient model of wind power system with doubly fed induction generator（DFIG） is established using EMTP/ATP software. The model comprises a wind speed model， a wind turbine model， a doubly fed induction machine with its control system， and a decoupling control system model for active power and reactive power. System simulations are carried out and the result shows the effectiveness of the proposed model.