一起220kV变压器突发短路故障分析

Analysis of sudden short circuit fault on a 220kV transformer

介绍了一起220kV变压器故障过程,对现场试验结果进行了分析,根据试验结果判断为绕组短路。为查找短路原因,对故障变压器进行了返厂解体,根据解体情况,对造成变压器绕组短路的原因进行了分析,验证了现场试验结果。根据故障原因对提高老旧变压器抗短路能力提出了建议。

In this paper, the fault of a 220 kV transformer is introduced, and the test results are analyzed. In order to find out the cause of the short circuit, the fault transformer is disintegrated, and the cause of transformer winding short circuit is analyzed according to the disintegration. According to the cause of the fault, the ability of resisting the short circuit of the old transformer is summarized.