针对多点接地故障的变压器铁芯建模优化与电流特征研究  

Study on modeling optimization and current characteristics of transformer core for multi-point grounding fault

作　　者：郭欣 曾成碧[1] 邓紫荣 苗虹[1] 白维 张志辉 Guo Xin;Zeng Chengbi;Deng Zirong;Miao Hong;Bai Wei;Zhang Zhihui(School of Electrical Engineering,Sichuan University,Chengdu 610065,China;Sichuan Geshiza Hydropower Development Co.,Ltd.,Danba 626300,Sichuan,China)

机构地区：[1]四川大学电气工程学院,成都610065 [2]四川革什扎水电开发有限责任公司,四川丹巴626300

出　　处：《电测与仪表》2023年第10期166-170,共5页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划项目(2018YFC1505502-03);成都市科技局项目(2019-RK00-00155-ZF)。

摘　　要：针对变压器铁芯多点接地故障,对接地电流进行研究,提出了一种实际应用上更简便的均匀化建模方法,并验证方法的准确性。同时通过建立变压器铁芯多点接地故障有限元模型,在Maxwell三维瞬态模式下对变压器多点接地故障进行有限元分析计算,探究了变压器铁芯多点接地故障下短路电流特征。Aiming at the multi-point grounding fault of the transformer core,the ground current is studied,and a simpler uniform modeling method in practical application is proposed,and the accuracy of the proposed method is verified.Meanwhile,the finite element model of the transformer core multi-point grounding fault is established.In the Maxwell three-dimensional transient mode,the finite element calculation of the transformer multi-point grounding fault is performed,and short-circuit current characteristics of the transformer core under multi-point grounding fault are analyzed.

关 键 词：多点接地故障 均匀化 有限元 电流特征 

分 类 号：TM93[电气工程—电力电子与电力传动]