一起短路冲击引起110kV变压器故障的诊断及处理

Diagnosis and Analysis of a 110 kV Transformer Fault Caused by Short Circuit Impulse

变压器的安全稳定运行是电网可靠供电的重要保证。对一起突发短路引发的110kV变压器损坏的事故进行诊断试验和分析,判断出了主变存在低压侧a相线圈部分断股,对地短路的故障,通过返厂解体印证了诊断结果,并给出了应对措施,为类似变压器经短路冲击后的诊断提供了参考经验。

The safe and stable operation of the transformer is a crucial part of the reliable power supply of the power grid.This paper diagnosed and analyzed an accident caused by a sudden short circuit in a 110 kV transformer.It determined that the transformer faults partial broken strand and short circuit to the ground of phase an at low voltage side.The diagnosis results were confirmed by returning to the factory for disassembly.This research provides a reference to the diagnosis of similar transformers after short-circuit impact.