110 kV电容式电压互感器试验数据异常升高故障分析  

Analysis of Abnormal Increase in Test Data of 110 kV Capacitive Voltage Transformer

作　　者：孙美玲 孙文杰 梁晖 刘璐 SUN Meiling;SUN Wenjie;LIANG Hui;LIU Lu(Wuxi Power Supply Company of State Grid Jiangsu Power Company,Wuxi 214000,China;Jinan Power Supply Company of State Grid Shandong Power Company,Jinan 250000,China;Yantai Natural Resources and Planning Bureau,Yantai 264000,China;School of Mathematics and Information Science,Shandong Technology and Business University,Yantai 264000,China)

机构地区：[1]国网江苏省电力公司无锡供电公司,江苏无锡214000 [2]国网山东省电力公司济南供电公司,山东济南250000 [3]烟台市自然资源与规划局,山东烟台264000 [4]山东工商学院数学与信息科学学院,山东烟台264000

出　　处：《电工技术》2024年第24期193-195,共3页Electric Engineering

摘　　要：介绍了一起110 kV电容式电压互感器试验数据异常超标故障的分析过程。通过停电试验发现电容式电压互感器的主电容和分压电容的介质损耗角正切值超出规定值,主电容的电容量初值差高于规定值。经解体检查和绝缘油化验分析认为该起故障是电容单体缺油和密封圈受潮导致的。最后提出及时诊断电容式电压互感器故障的措施和建议。This paper presents the process of fault analysis for the abnormal exceeding of test data of a 110 kV capacitive voltage transformer.Through power-off tests,it was found that the dielectric loss tangent values of the main capacitor and the voltage division capacitor exceeded the specified values respectively.The initial capacitance difference of the main capacitor exceeded the specified value.Through disassembly inspection and insulation oil analysis,it was concluded that the fault was caused by oil deficiency in the capacitor unit and moisture ingress into the sealing ring.Finally,measures and suggestions for timely diagnosis of faults in capacitive voltage transformers are proposed.

关 键 词：电容式电压互感器 介质损耗角正切值 电容量 解体检查 

分 类 号：TM451[电气工程—电器]