一起110kV变压器高压侧套管介质损耗异常分析

Analysis on Abnormal Dielectric Loss of Bushing in High Voltage Side of 110kV Transformer

变压器套管具有支撑引流导线、延长绝缘间距的作用,是变压器重要载流元件,其密封性能、绝缘强度、热稳定性直接影响变压器的稳定运行。因密封不良导致套管绝缘油色谱数据异常、介质损耗超标是套管常见故障。文中分析了一起介质损耗超标、油色谱异常缺陷,结果表明,该缺陷是因取油操作不当进而造成套管严重缺油导致内部受潮。

Transformer bushing has the functions of supporting drainage wire and extending insulation distance,and it is an important current carrying element of transformer,whose sealing performance,insulation strength and thermal stability will directly affect the stable operation of transformer.Abnormal chromatographic data of insulating oil in bushing and the excessive dielectric loss is common faults of bushing due to poor sealing.A case of serious oil shortage in bushing caused by improper operation of oil extraction is analyzed,which results in excessive dielectric loss and abnormal oil chromatographic fault.