摘要
针对三绕组有载调压开关变压器绝缘电阻不合格问题展开检查,分析了变压器高压侧接线及绝缘电阻测试原理,综合分析各项试验,初步判断绝缘下降原因在分接开关。通过分接开关试验,发现有载分接开关进水受潮,造成绝缘电阻降低,经过处理绝缘电阻恢复合格。
For the unqualified transformer insulation resistance of the three winding on - load tap changer, the high voltage side connection and the testing principle of transformer insulation resistance are analyzed. Through comprehensivly analyzing each test, the cause of the insulation switch, it is preliminarily concluded to be tap is found that on - load tap changer changing switch. By the test of tap changing dampened by the inlet water, and lead to the insulation resistance reduction. So through the treatment method the insulation resistance is qualified.
作者
欧阳进
胡海宁
蒯强
周劲武
易登辉
OUYANG Jin;HU Haining;KUAI Qiang;ZHOU Jinwu;Yi Denghui(Changsha Power Supply Company of State Grid Hunan Power Company,Changsha Hunan 410000,China)
出处
《宁夏电力》
2018年第4期50-52,65,共4页
Ningxia Electric Power
关键词
有载调压开关
变压器
绝缘电阻
受潮
on - load tap changer
transformer
insulation resistance
moisture