吴振宇;周利军;王东阳;张桂南;于兴宇;江飞明;周猛;

• 1:西南交通大学电气工程学院
• 2:中国铁道科学研究院集团有限公司机车车辆研究所

摘要(Abstract)：

高速铁路动车组车载变压器采用单相分裂式绕组结构，4组高压绕组在油箱内部并联连接，导致无法独立测量各组的频率响应曲线，从而无法确定故障绕组。为解决上述问题，联合MATLAB软件与Maxwell软件，建立并验证考虑绕组相间电容的车载变压器频率响应优化模型；基于优化模型模拟不同故障绕组下多端口频率响应曲线演变规律，同时结合多条频率响应曲线的特征谐振点偏移规律识别故障绕组，解析故障绕组定位步骤，并进行故障模拟验证。结果表明：当靠近铁芯的外层牵引绕组出现故障时，高压绕组频率响应曲线不发生变化，但牵引绕组频率响应曲线变化显著，而当其他绕组出现故障时，高压绕组频率响应曲线均发生变化；当高压绕组出现故障时，牵引绕组频率响应曲线的第一谐振点和第二谐振点均向右偏移，而第三谐振点几乎不变；当远离铁芯的内层牵引绕组出现故障时，牵引绕组频率响应曲线的第一谐振点与第二谐振点均向左偏移，而第三谐振点则向右偏移。

关键词(KeyWords)： 车载变压器;分裂式绕组;频率响应法;有限元;轴向移位;故障定位;谐振点

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金高铁联合基金资助项目（U1834203）;; 四川省科技计划项目（2020JDTD0009）;; 广东省基础与应用基础研究基金资助项目（2020B1515130001）;; 中国铁道科学研究院集团有限公司院基金课题（2020YJ082）

作者(Authors): 吴振宇;周利军;王东阳;张桂南;于兴宇;江飞明;周猛;

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