一起220kV主变油色谱总烃超标缺陷分析及处理

Analysis and Treatment of Total Hydrocarbon Overstandard Defect in 220kV Transformer

本文中作者介绍了一起由220kV主变油中溶解气体总烃超标发现的铁心多点接地缺陷,通过红外测温、铁心接地电流、局部放电带电检测及离线色谱跟踪分析,判断主变内存在铁心多点接地现象,停电后经电容放电处理铁心恢复正常。

A core multi-point grounding defect found by the total hydrocarbons dissolved in the 220kV main transformer oil exceeds the standard is introduced by the author in this paper.Through infrared temperature measurement,core grounding current,partial discharge charge detection and off-line chromatographic tracking analysis,it is judged that there is a core multi-point grounding phenomenon in the main transformer,and the core returns to normal after capacitor discharge treatment after power failure.