分析了变速恒频双馈风力发电机组的工作原理,建立了包含变频器的双馈风力发电机组动态数学模型,并利用MATLAB/S imu link软件搭建了并网型双馈风力发电机组的仿真模块,通过仿真试验主要分析了外部电网故障下变速恒频双馈风力发电机组的低电压穿越功能,为今后变速恒频双馈风力发电机组在大型并网风电场中的应用提供了可靠的理论依据。
The working principle of the variable speed constant frequency (VSCF) doubly-fed induction generator (DFIG) was presented, and the dynamic mathematic model for the variable speed DFIG system was built, as well as the simulink model by MATLAB/Simulink. The simulation results showed that the VSCF DFIG has low voltage ridethrough (LVRT)capability under external grid faults.