基于多回路模型的双馈异步发电机匝间短路故障检测方法研究  

Detection of Inner-turn Short Circuit Faults in Doubly-fed Induction Generator Based on Multi-loop Theory

作　　者：钱雅云[1] 马宏忠[1] 张志新[1] 程俊[1] 王安其[1] 

机构地区：[1]河海大学能源与电气学院,南京210098

出　　处：《大电机技术》2012年第5期35-37,64,共4页Large Electric Machine and Hydraulic Turbine

基　　金：2009年教育部博士点基金项目(20090944110011);2011年国家自然科学基金项目(51177039)

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。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.

关 键 词：双馈异步发电机 多回路模型 负序电流 匝间短路 故障检测 

分 类 号：TM343[电气工程—电机]