电网故障下双馈风力发电机暂态电流分析

Analysis on Transient Current of Double-fed Wind Power Generator under Grid Fault Conditions

通过分析双馈风力发电机的暂态电气关系,推导转子暂态电流的时域表达式;并通过对比不同跌落系数下的暂态电流,分析了转子暂态电流的变化规律;并对电网三相短路故障下双馈风力发电机的暂态响应进行仿真,验证了暂态电流表达式的正确性。

Through analyzing the transient equations, this paper deduces the time-domain expressions of the rotor transient currents, obtains the change law of the rotor transient eurrents in contrast with different voltage dip ratios, and carries out the simulation experiment on the transient response of the doubly-fed wind power generator under grid three-phase short circuit fault condition. The result validated the proposed expressions of transient currents.