一起110 kV主变压器套管受潮导致的故障分析

Failure Analysis on Bushing Affected by Damp for 110 kV Main Transformer

摘要:

介绍了一起110 kV主变压器套管爆炸故障，对油色谱、套管检查结果进行了详细分析。结果表明，变压器套管注油孔胶垫老化变形、压缩量减小、密封失效、进水受潮是导致故障的根本原因。针对该故障提出了相应的整改措施。

Abstract:

An explosion failure of 110 kV main transformer bushing is introduced, and it is analyzed in detail with oil chromatogram and bushing inspection. The results show that the rubber pad of oil filling hole of transformer bushing becomes ageing and deformed, the compression is reduced and there is sealing failure resulting in damp condition, which is the root causes of the failure. Finally, the corresponding improvement measures are proposed.