Doubly fed induction generator (DFIG) wind turbines are widely utilized in large wind plants. Research of the dynamic behaviors of DFIG wind turbine is of great importance. In this paper, the 8th, 5th and 3rd order models of DFIG wind turbines are discussed respectively. The 8th order model includes the complete drive train, the stator and the rotor models. The 5th order model contains the stator and the rotor models, as well as a reduced drive train model. The 3rd order model, with the stator transients being neglected, comprises the rotor model and a reduced drive train model. These three types of DFIG wind turbine are modeled in MATLAB/Simulink software package. Two cases of simulation are conducted to verify the models and compare their responses. The simulation results demonstrate that the 8th order model is the most precise model, but needs the longest simulation time; the 3rd order model is a good approximation and the most time-effective; the 5th order model is suitable for most studies that require both fast computation speed and relatively high precision.%在大型风力发电厂中双馈感应风力发电机组将被广泛应用,深入了解双馈感应风力发电机组动态特性非常必要.文中给出了双馈机组的8阶、5阶和3阶模型.8阶模型包括完整的传动系统模型、定子模型和转子模型;5阶模型包括定子、转子模型和简化的传动系统模型;忽略定子的暂态过程后,3阶模型包括转子模型和简化的传动系统模型.在MATLAB/Simulink软件上实现了3种模型建模.完成了对2种情况的仿真,仿真结果验证了上述3种模型的正确性,并比较了各自的响应特性.仿真结果表明:8阶模型具有最精确完整的响应,但仿真时间最长;3阶模型采用最大程度的近似,但仿真时间最短;5阶模型适合大多数既要求较快仿真速度又要求较高精度的研究.
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