【摘要】 双馈风力发电机组(DFIG风电机组)广泛应用于各项风电装机工程中,其电磁暂态响应机理对DFIG风电机组在机端电压跌落下受到的冲击模式具有重要影响。首先,本文总结了DFIG风电机组的五阶动态模型,推导了以定、转子磁链为状态变量的DFIG状态方程。其次,以αβ坐标系下的DFIG模型为基础,对不同低电压穿越方式下的DFIG电磁暂态机理进行研究。最后,以MATLAB/Simulink为平台,分别根据其不同的低电压穿越方式对电压跌落下的DFIG风电机组进行了仿真。根据仿真结果,验证了所提出的DFIG风电机组在电压跌落时的电磁暂态响应机理。更多还原

【Abstract】 Doubly fed induction generator(DFIG)is now widely applied in wind power generation,whose electro-magnetic transient mechanism decides how it be affected by the terminal voltage dip.Firstly,this paper derived the DFIG state equation based on the DFIG 5th order model.Also,this paper investigated the electro-magnetic transient mechanism of DFIG under different low voltage ride through(LVRT)conditions inαβreference.Using MATLAB/Simulink,the electro-magnetic transient response was acquired through simulations of DFIG under different LVRT conditions.The simulation resultverified the electro-magnetic transient mechanism of DFIG.更多还原