变压器绕组振荡波建模及轴向移位故障分析  

Oscillation wave modeling and axial shift fault analysis of transformer winding

作　　者：周利军[1] 周祥宇 吴振宇 林桐 徐肖伟 张陈擎宇 ZHOU Lijun;ZHOU Xiangyu;WU Zhenyu;LIN Tong;XU Xiaowei;ZHANG Chenqingyu(College of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756 [2]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《电力自动化设备》2021年第3期157-163,188,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金高铁联合基金资助项目(U183420005);云南电网有限责任公司科技项目(YNKJXM20170729);四川省科技计划项目(青年科技创新研究团队项目)(2020JDTD0009)。

摘　　要：从变压器自身属性分析了振荡波的机理,针对一台三绕组变压器搭建了有限元模型得到了绕组电气参数矩阵,基于绕组集总参数电路建立了全电容、电感矩阵参数下的振荡波时域数学模型,通过将仿真曲线与实测曲线进行对比验证了模型的有效性。然后以轴向移位故障为例,分析了轴向移位故障下变压器绕组参数的变化规律及其与振荡波之间的映射关系,重点分析了轴向移位故障下振荡波极值点的变化规律。研究结果表明:轴向移位故障下电容参数的变化对于振荡波有显著的影响,振荡波极值点幅值偏移量较大;随着故障程度的加深,振荡波的波峰、波谷逐渐向上偏移。The mechanism of oscillation wave is analyzed from the properties of transformer itself.For a three-winding transformer,the finite element model is built to obtain the electrical parameter matrix of the windings.Based on the lumped parameter circuit of the windings,the time-domain mathematical model of oscillation wave under parameters of full capacitance and inductance matrix is established,and the validity of the model is verified by comparing the simulative curves with the measured curves.Then,taking the axial shift fault as an example,the variation rules of parameters of the transformer windings and the mapping relationship between parameters of the transformer winding and the oscillation wave are analyzed,and the variation rules of the extreme points of oscillation wave under the axial shift fault are analyzed emphatically.The study results show that the change of capacitance parameters under axial shift fault has significant influences on oscillation wave,and the amplitudes offset of the extreme points of the oscillation wave are large.With the deepening of the fault degree,the wave peaks and valleys of the oscillation wave gradually shift upward.

关 键 词：变压器 高压振荡波法 有限元计算 建模 轴向移位故障 极值点偏移量 

分 类 号：TM41[电气工程—电器]