摘要
描述了500 kV电容型电压互感器的诊断性试验过程,结合现场解体结果,对试验过程中出现的电容量变小、变比变大、高压电流波动、CVT高电压超四种结果进行分析,阐述了四种结果与电容型电压互感器电容单元内部引线撕裂而出现的虚接的内在联系。分析造成电容单元内部引线虚接的原因并提出解决方法,给500 kV电容型电压互感器故障分析及处理提供了经验。
The diagnostic test process of 500 kV Capacitor voltage transformer is introduced.Based on the results of on-site disassembly,the four results in the test process,such as smaller capacitance,larger transformation ratio,high-voltage current fluctuation and CVT high-voltage overload,are analyzed.The internal relations between the four results and the virtual connection appearing due to the tearing of the internal leads of the capacitor unit of the capacitor voltage transformer are described.The causes of lead virtual connection in capacitor unit and puts forward solutions are analyzed,which provides experience for fault analysis and treatment of 500 kV Capacitive Voltage transformer.
作者
赵映宇
王敏
叶少坤
兰静涛
许海锋
ZHAO Yingyu;WANG Min;YE Shaokun;LAN Jingtao;XU Haifeng(State Grid Henan Electric Power Corporation Maintenance Company,Zhengzhou 450000,China)
出处
《电工技术》
2021年第20期86-88,共3页
Electric Engineering
关键词
电容型电压互感器
虚接
500
kV
电容单元
capacitive voltage transformer
virtual connection
500 kV
capacitor unit
