接入配电网的双馈风力发电机短路电流特性及影响

目前关于基于双馈感应发电机(DFIG)的风力发电机组短路电流的研究以非并网DFIG以及并网DFIG机端短路的情况为主,很少考虑电网对DFIG短路电流的影响.针对DFIG以分布式电源的方式接入配电网,其短路电流可能会受到配电网运行工况、短路点与DFIG接入点位置等影响的问题,结合DFIG的控制策略进行了理论推导和仿真分析.首先,基于感应电机的Park模型,对DFIG在电网故障时的短路过程进行了数学推导和分析,给出了计及控制策略变化的并网DFIG短路电流的解析表达式.然后,对DFIG短路电流的特性进行了分析,针对可能影响DFIG短路电流的各种因素进行了分析和仿真,并给出了相关结论.

Characteristics of Short-circuit Current of Wind Turbine Driven DFIG and Its Impacts on Grid-connected Distribution Network

Most research on the short-circuit current contributed by wind turbine driven doubly-fed induction generator(DFIG) focuses on the non-grid-connected DFIG and grid-connected DFIG with the short-circuit point located at the generator's terminal.When the DFIG is connected to a distribution network,the short-circuit current of DFIG may be affected by the characteristics of the distribution network,the location of the short-circuit point and other factors.First,based on the Park model of induction motor,a detail...