一起铁心夹件接地电流异常案例分析  

Case Analysis of Abnormal Grounding Current of Iron Core Clamp

作　　者：黄银龙 李洪波 罗光辉 李纯 董超群 HUANG Yinlong;LI Hongbo;LUO Guanghui;LI Chun;DONG Chaoqun(State Grid Henan Electric Power Company Ultrahigh Voltage Company,Zhengzhou 450000,China)

机构地区：[1]国网河南省电力公司超高压公司,河南郑州450000

出　　处：《电工技术》2022年第22期177-178,182,共3页Electric Engineering

摘　　要：对于运行中的电力变压器,铁心夹件接地电流是反映其运行状态的重要参数,也是带电检测的重要试验项目。通过对铁心夹件接地电流的检测,发现一起夹件接地电流异常升高故障。通过试验数据,结合理论分析,并经过现场检查验证,确认是夹件引下线与变压器本体短路,形成环流通路,导致试验数据异常。For power transformers in operation,the ground current of the iron core clip is an important parameter reflecting its operating state,and it is also an important test item for live detection.Through the detection of the grounding current of the iron core clamp,it is found that the grounding current of the clamp rises abnormally.Based on the test data,theoretical analysis and field inspection,it is confirmed that the clamp downlead was short circuited with the transformer body,forming a circulating circuit,which led to abnormal test data.

关 键 词：变压器 接地电流 环流 

分 类 号：TM07[电气工程—电工理论与新技术]