The doubly-fed induction wind turbine is an asynchronous motor with a three-phase excitation winding structure, and its operation has the characteristics of variable speed and constant frequency, so it has important application value in the field of wind power generation in new power systems. In this paper, a mathematical model under the dq coordinate system is constructed using the Park transformation, and the active and reactive power of the motor are controlled separately, and the voltage-oriented vector control method is used to realize the variable-speed and constant-frequency operation of the doubly-fed induction wind turbine. After that, a complete model of the doubly-fed induction wind turbine and its control system is built, and the effect of the proposed control strategy is verified. The simulation results show that the control strategy has a good tracking effect on the power command value, and can achieve stable variable-speed and constant-frequency operation with changing wind speeds. This work is supported by the Science and Technology Project of China Southern Power Grid Co., Ltd. (No. GZKJXM20210373).