500kV电容式电压互感器介质损耗异常分析及处理  

Analysis and Treatment of Abnormal Dielectric Loss of a 500kV Capacitive Voltage Transformer

作　　者：饶蕾 刘国建 韩尊占 何强 熊舟 RAO Lei;LIU Guojian;HAN Zunzhan;HE Qiang;XIONG Zhou(Three Gorges Hydropower Plant,China Yangtze Power Co.,Ltd.,Yichang 443133,China)

机构地区：[1]中国长江电力股份有限公司三峡水力发电厂,湖北宜昌443133

出　　处：《水电与新能源》2022年第4期63-66,共4页Hydropower and New Energy

摘　　要：基于一起500 kV出线电容式电压互感器上节电容器介质损耗因数超标及其原因分析,发现是由于CVT上端电容器一次接线端锈蚀等引起。在对容性试品进行介损及电容量测试时,应尽可能的保证测试回路接触良好、可靠,保证测量回路的完整性,排除环境因素的影响。Over-standard dielectric loss is found in the capacitive voltage transformer(CVT)of a 500 kV transmission line.Analysis shows that the fault is caused by the rustiness of the primary terminal of the upper end capacitor of the CVT.Thus,during the dielectric loss and capacitance tests of capacitive objects,the test circuit should be in good and reliable contacts to ensure the integrity of the measurement loop and eliminate the influence of environmental factors.

关 键 词：500kV出线 电容式电压互感器 介质损耗因数 超标 

分 类 号：TM451[电气工程—电器]