双馈异步发电机定子匝间短路对并联支路环流特性的影响  

Effect of Stator Interturn Short Circuit on Circulating Current Characteristics of Parallel Branches in Doubly Fed Induction Generator

作　　者：何玉灵[1] 刘翔奥 代德瑞 徐明星 张文[1] 赵路佳 万书亭[1] 李俊卿[3] HE Yuling;LIU Xiangao;DAI Derui;XU Mingxing;ZHANG Wen;ZHAO Lujia;WAN Shuting;LI Junqing(Hebei Provincial Key Lab of Health Maintenance and Failure Prevention of Electric Machinery Equipment(North China Electric Power University),Baoding 071003,China;Engineering Training Center(North China Electric Power University),Baoding 071003,China;School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]河北省电力机械设备健康维护与失效预防重点实验室(华北电力大学),河北保定071003 [2]华北电力大学工程训练中心,河北保定071003 [3]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报(自然科学版)》2025年第1期74-81,共8页Journal of North China Electric Power University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52177042);河北省自然科学基金资助项目(E2020502031);中央高校基本科研业务费专项基金资助项目(2020MS114);河北省第三批青年拔尖人才支持计划资助项目([2018]-27);河北省研究生创新能力培养资助项目(CXZZBS2023149);苏州市社会发展科技创新资助项目(SS202134).

摘　　要：分析了双馈异步发电机定子匝间短路故障前后的定子绕组并联支路环流特性。首先对正常情况和匝间短路情况下气隙磁通密度表达式进行了推导,得到了并联支路环流的解析表达式;然后建立了故障前后的二维有限元计算模型并对并联支路环流进行求解计算;最后在故障模拟发电机组上完成了实验验证,所得实验结果与理论推导及有限元仿真结果基本吻合。结果表明:正常情况下发电机定子绕组无并联支路环流,而单条支路短路故障发生后并联支路内出现环流,其频率成分为f、f_(u)、(1+(n±x)(1-s))f,并且随着故障程度的加剧各并联支路环流频率成分幅值将会增加;两条并联支路发生相同程度短路故障后无并联支路环流。This paper analyzed the characteristics of the circulating current inside parallel branches(CCPB)of the stator winding before and after the stator interturn short circuit(SISC)fault in doubly-fed induction generators.Firstly,we derived the formula of the air gap magnetic flux density before and after SISC to obtain the expression of the CCPB.Secondly,we set up the two dimensional finite element model to calculate the CCPB.Finally,we established the experiments on the fault simulation unit,and obtained the experimental results that are in general agreement with the theoretical derivation and finite element simulation results.The results show that there is no CCPB inside the stator winding under normal conditions,while the CCPB appears after a single branch short-circuit fault occurs.The frequency components of CCPB include f,f_(u),and(1+(n±x)(1-s))f.The amplitude of each short-circuit frequency component increases with the aggravation of the fault degree.There is no CCPB after two parallel branches have the same degree of short-circuit fault.

关 键 词：双馈异步发电机 定子匝间短路 有限元分析 并联支路环流 故障特征。 

分 类 号：TM315[电气工程—电机]