一起换流变压器产气故障的分析与诊断

Analysis and Diagnosis of A Gas Production Fault of Converter Transformer

摘要:

介绍了一起换流变压器的典型运维检修案例。首先，对返厂后进行的常规试验、耐压试验、感应电压试验、长时空载试验和过电流试验等成品试验结果进行了分析，确定了换流变压器内部存在过热故障；然后，通过吊芯解体发现换流变压器铁芯存在片间短接情况和绕组存在烧熔现象，印证了之前的试验判断；最后，对该系列产品后续的工艺改进和出厂试验提出了几点建议。

Abstract:

A typical operation and maintenance case of converter transformer is introduced. Firstly,the conventional test, withstand voltage test, induced voltage test, long-time no-load test and overcurrent test are analyzed after the converter transformer being returned to the manufacturer, and it is determined that there exists overheating fault inside the converter transformer. And through the disassembly of hanging core, it is found that the core of converter transformer is short circuited between pieces and the winding is burnt, which confirms the previous test judgment. Finally, some suggestions are put forward for the following process improvement and factory test of this series of products.