风电场故障特性仿真研究

在DIgSILENT/Power Factory中构建了含风电场的电力系统仿真模型,对由恒速异步风电机组和双馈异步风电机组构成的风电场的故障特性及其影响因素进行了仿真研究,对比分析了不同类型的风电机组与相同容量的同步机组的故障特性的异同。仿真和分析结果表明：不同类型的风电场在系统故障时提供的短路电流不同,并远小于相同容量的同步机组所提供的短路电流,因此可以在短路电流过大的地点建设相同容量的风电场而不是传统的火电厂;在含风电场的配电网中,要考虑风电场对继电保护的影响,在风电接入系统的可研阶段不能简单将风电场视为相同容量的同步机组进行研究。

Simulation and Research on Fault Performance of Wind Farm

The models of power system with the wind turbine generator,including fixed-speed wind turbine generator and doubly-fed induction generator,are established by using DIgSILENT/Power Factory. The fault performance of wind farm and its influence factors are simulated and studied. The fault performance are compared and analyzed between wind turbine generators and synchronous generator with same capacity. The simulation and analysis results show that during power system fault,the short-circuit current （SCC） of wind farm vary from type to type,and very smaller than the SCC of synchronous generator with same capacity. So wind farms should be build on the site of the SCC out of limit rather than the conventional power plants. On the distribution grid,what the wind farm built in,that the wind farm has an effect on relay protection should be taken into consideration,and it is unsuitable to simply regard wind farm as synchronous generator with same capacity during the feasibility study of wind farm injection.