一起500 kV变压器铁芯接地电流异常的分析及处理  

Analysis and Treatment of Abnormal Grounding Current of Iron Core for 500 kV Transformer

作　　者：叶国良 刘涛 蔡龑 陈加盛 戴金霖 YE Guoliang;LIU Tao;CAI Yan;CHEN Jiasheng;DAI Jinlin(State Grid Fujian Maintenance Co.,Ltd.,Xiamen,Fujian 361000, China)

机构地区：[1]国网福建省电力有限公司检修分公司,福建厦门361000

出　　处：《东北电力技术》2021年第8期54-57,共4页Northeast Electric Power Technology

摘　　要：描述某500 kV变压器铁芯接地电流异常现象,采取带电检测技术及停电内检方法对该变压器进行分析及处理,发现铁芯与夹件之间的部分磁屏蔽件存在绝缘薄弱的问题。为杜绝隐患,对铁芯与夹件之间的所有磁屏蔽件进行绝缘加强处理,恢复运行后铁芯接地电流正常,为相关500 kV变压器铁芯接地电流异常情况处理提供参考。It describes an abnormal grounding current of iron core of 500 kV transformer.The insulation of some magnetic shielding parts between the core and the clamp is weak by adopting the live detection technology and the method of internal examination.In order to eliminate possible hidden dangers,all magnetic shielding parts between the core and clamp are strengthened,and the core ground current is normal after peration.It provides a reference for the abnormal grounding current of the iron core of the related 500 kV transformer.

关 键 词：铁芯 接地电流 异常 内检 磁屏蔽 

分 类 号：TM41[电气工程—电器]