一起110kV电容式电压互感器异常诊断分析  

Diagnosis and Analysis of an Abnormal 110 kV Capacitive Voltage Transformer

作　　者：佘立伟 SHE Liwei(State Grid Hunan Electric Power Corporation Hengyang Supply Company,Hengyang 421001,China)

机构地区：[1]国网湖南省电力有限公司衡阳供电分公司,湖南衡阳421001

出　　处：《电工技术》2020年第11期85-87,共3页Electric Engineering

摘　　要：对一起110 kV电容式电压互感器(CVT)异常状况展开诊断分析,通过诊断性电气试验、油色谱检测及解体检查联合诊断得出异常原因为CVT中压变压器高压侧一次引线连接处接触不良,产生悬浮放电,导致电压互感器异响。最后,对CVT的日常运维检修提出了改进建议,为一线人员分析CVT异常提供技术参考,减少CVT故障的发生。An abnormal condition of 110 kV capacitive voltage transformer(CVT)was analyzed d diagnosed.Through diagnostic electrical test,oil chromatogram detection and disassembly inspection,it was found that the abnormal cause was the poor contact of the primary lead at the high voltage side of CVT medium voltage transformer,which caused the suspension discharge and the abnormal noise of the voltage transformer.Finally,suggestions for improvement of the daily operation and maintenance of CVT was put forward,providing technical reference for front-line personnel to analyze the abnormality of CVT,and reducing the occurrence of CVT failure.

关 键 词：电容式电压互感器 中间变压器 联合诊断分析 悬浮放电 

分 类 号：TM451[电气工程—电器]