油浸式变压器铁芯多点接地故障诊断与处理

Diagnosis and Solution of Iron Core Multipoint Earthing Faults of Oil-immersed Transformer

万家寨水电站2号主变压器运行至2015年,在进行第一季度、第二季度油中溶解气体色谱分析时,发现变压器内部存在高温过热故障,对铁芯进行绝缘电阻测量,阻值为0Ω。本文通过对万家寨水电站220kV大型油浸式变压器铁芯多点接地故障的处理,阐述了如何运用变压器油中溶解气体色谱分析、电气性能试验等方法,进行故障诊断和识别,并介绍设备故障的处理方法,供参考。

Wanjiazhai Hydropower Station 2# main transformer is operated till 2015. It is discovered that high temperatureoverheating faults are available in the transformer during gas dissolved in oil chromatographic analysis in the first quarterand the second quarter. The iron core insulation resistance is measured, and the resistance value is 0Ω. In to utilize transformer gas dissolved in oil chromatographic analysis, electric performance test and other methdiagnosis and recognition is described through solving iron core multi-point earthing faults of Wanjiazhai Hydropower Station 2 20kV large oil-immersed transformer, and the equipment fault solutions are introduced as reference for you.