中文摘要：

基于多回路理论,导出了绕线型双馈异步风力发电机在正常和匝间短路情况下的多回路数学模型。应用该模型对绕线型双馈异步电机定子绕组匝间短路故障瞬变过程进行仿真分析,从而指出定子负序电流可用于检测定子绕组匝间短路故障,但是由于负载的影响容易产生误判。以此为基础,提出了负载系数以及负载的影响,应用于设定适当的负序电流检测阈值,取得良好的效果。

英文摘要：

The multi-loop mathematical model of doubly-fed induction generator（DFIG） is deduced and developed successfully under the conditions that the motor is healthy,stator winding inner-turn short circuit（SWITSC） fault.Based on above works,the simulation of the SWITSC fault accomplished to research the transient process of the negative sequence component of stator current.The results of the simulation show that the negative sequence components of stator circuit can be used to detect the SWITSC fault,but can also lead to misjudgment due to the impact of the load.The load factor is proposed to take into account of the impact of the load to set the appropriate detection threshold of the RMS of negative sequence current,and has achieved good results.