摘要
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。
The on-board transformer of high-speed railway EMU adopts the single-phase split winding structure,with four groups of high-voltage windings connected in parallel inside the oil tank.Therefore,it is impossible to obtain the frequency response curve of each group with independent measurement,so as unable to identify the faulty winding.To solve the problem,MATLAB and Maxwell are operated in coordination to establish and verify the frequency response optimization model of the on-board transformer,considering the interphase capacitance of windings.Based on the optimization model,the evolution rules of multi-port frequency response curves with different faulty windings are simulated.The shifting rules of characteristic resonance points of multiple frequency response curves complement the model identifying the faulty windings and analyze the fault winding location steps.Simulations of the faults are carried out to verify the model.The results show that when the outer layer of the traction winding close to the iron core fails,the frequency response curve of the high-voltage winding does not change,while the frequency response curve of the traction winding changes significantly.Whereas,when the other windings fail,the frequency response curves of the high-voltage windings change correspondingly.When the high-voltage winding fails,the first and the second resonance points of the frequency response curve of the traction winding are shifted to the right,while the third barely changed.When the inner layer of the traction winding far from the iron core fails,the first and the second resonance points of the frequency response curve of the traction winding are shifted to the left,while the third to the right.
作者
吴振宇
周利军
王东阳
张桂南
于兴宇
江飞明
周猛
WU Zhenyu;ZHOU Lijun;WANG Dongyang;ZHANG Guinan;YU Xingyu;JIANG Feiming;ZHOU Meng(School of Electrical Engineering,Southwest Jiaotong University,Chengdu Sichuan 611756,China;Locomotive and Car Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2022年第3期103-113,共11页
China Railway Science
基金
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)。
关键词
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
On-board transformer
Split winding
Frequency response method
FEM
Axial displacement
Fault location
Resonance point
