电磁式电压互感器空载励磁电流异常的原因分析

Analysis of Abnormal No-load Excitation Current of Electromagnetic Voltage Transformer

介绍了电磁式电压互感器空载励磁电流测试的原理和方法,分析了110kV国贸变GIS中大国1505线路A相压变空载励磁电流异常的原因,与出厂试验数据进行比较,并经过准确计算查找出了高压侧对地电容的影响因素,为GIS线路压变空载励磁电流的测量提供了借鉴。

This paper introduces testing principles and methods of no-load excitation current of electromagnetic voltage transformer. The paper analyzes reason of abnormal no-load excitation current of electromagnetic voltage transformer of Dagno 1505 line A phase in 110 kV Guomao substation GIS, compares with factory test data, calculates accurately and finds out influencing factors of a high-voltage side-to-ground capacitance. The paper provides a reference for no-load excitation current measurement of GIS line electromagnetic voltage transformer.