变压器绝缘油色谱超标典型缺陷分析

Defect Analysis on Insulation Oil Chromatography Excessive of Transformer

针对某110k V变电站主变压器的绝缘油色谱超标故障,介绍主变压器吊罩解体检查和电气试验,得出有载开关本体与主变压器连接密封胶垫损坏产生内漏,有载开关的污油经过波纹膨胀器的负压作用流入主变压器本体是导致绝缘油色谱超标的主要原因,说明了此类新型波纹膨胀器形成负压的原理,指出设计缺陷,并提出相应的改进措施及建议。

The paper introduces insulating oil chromatography excessive fault of a 110 kV substation main transformer, the main transformer hanging hood disintegration of inspection, electrical test, find the reasons for the failure load switch body and con- nected to the main transformer pads seal damage to internal leakage, load switch waste oil through the negative pressure bel- lows expansion into the main transformer itself. Finally the new bellows expansion is formed of such a negative pressure princi- ple, and proposes the corresponding improvement measures and suggestions.