电容式电压互感器介损测量异常原因分析  

Cause Analysis of Abnormal Dielectric Loss Measurement of Capacitor Voltage Transformer

作　　者：郑宇 冯洋 Zheng Yu;Feng Yang

机构地区：[1]国网浙江省电力有限公司衢州供电公司,浙江衢州324000

出　　处：《电力系统装备》2021年第14期112-113,共2页Electric Power System Equipment

摘　　要：文章介绍了一起电容式电压互感器(Capacitor Voltage Transformer,CVT)在交接试验阶段发现介损测量值异常事件。检修人员为寻找介损异常原因,通过现场试验、返厂解体试验后发现在高电压下介损测量值与出厂试验值一致。经理论与实践论证后得出,Garton效应是造成此次事件的主要原因,并提出了判别CVT发生Garton效应的方法及处理建议。This paper introduces an abnormal dielectric loss event of capacitor voltage transformer(CVT)during the handover test.In order to find out the cause of abnormal dielectric loss,the maintenance personnel found that the measured value of dielectric loss under high voltage was consistent with the factory test value through field test and factory disassembly test.After theoretical and practical demonstration,it is concluded that Garton effect is the main cause of this event,and the method to distinguish the occurrence of Garton effect in CVT and the treatment suggestions are put forward.

关 键 词：电容式电压互感器 介质损耗因素 GARTON效应 

分 类 号：TM451.2[电气工程—电器]