基于PSCAD的双馈风力发电系统低电压穿越仿真研究

Research on Low Voltage Ride through of Doubl-fed Wind Induction Generator Based on PSCAD

针对双馈风力发电系统低电压穿越(LVRT)中定转子过电流问题,在电网低电压故障时选择主动式转子Crowbar保护电路旁路转子变流器限制转子变流器电流。基于PSCAD/EMTDC建立了双馈风力机组的仿真模型并在电网三相对称低电压故障下进行了仿真分析,仿真结果验证了主动式转子Crowbar保护电路实现LVRT的有效性。

To limit the current in stator and rotor circuit is a key technology for the low-voltage ride through（LVRT） of the double-fed wind power generating system.An active rotor crowbar circuit is used for limiting the over current in the rotor.This paper uses DFIG to establish.a simulation model for the wind power system and carries out simulation analysis based on PSCAD/EMTDC.The simulation results show that the active rotor crowbar circuit for the LVRT of the wind power system is effective.