一起 110 kV 变压器绕组变形故障分析判断及解体验证

Analysis of One 110 kV Transformer Winding Deformation Fault and Disassembly Validation

摘要:

介绍了一起 110 kV 三绕组变压器停电后例行检查过程中发现缺陷的过程情况，为变压器的精确诊断提供了 典型案例。通过试验过程中的电气试验和油化试验数据以及带电振动测试数据对变压器进行了综合分析，最终得出 变压器中压侧( 35 kV 侧) 遭受电流冲击导致绕组变形的结论，并解体得到了验证。通过对该变压器的精确诊断，有效 地避免了一次变压器潜伏性事故的发生，并给出了变压器日常例行检查及带电检测工作中的注意事项和检修建议。

Abstract:

The defects found in the routine inspection of 110 kV three － winding transformer after power failure are introduced， which provides a typical case of precise diagnosis for transformer． According to the data of electrical test and oilification test as well as the live vibration test，a comprehensive analysis is carried out for the transformer． The results show that the medium voltage side ( 35 kV side) of transformer suffers from the current shocking resulting in winding deformation，and it is verified after disassembly． The accurate diagnosis of the transformer avoids a potential transformer accident，and the suggestions and maintenance experiences for the routine inspection and live testing are also given．