一例换流变压器匝间短路故障分析

摘要

Introduction was made to a case of protective action, emerging in debugging process, caused by the converter transformer winding tum-to-tum insulation fault and a case that the direct current system stopped operation. Analysis was made to the converter transformer winding tum-to-tum insulation fault process and the interior fault point of winding was found by field test and disassembling analysis. It is pointed out that in the process of transportation and storage damping will lead to transformer interior fault. This paper proposes improved suggestions for the converter transformer commissioning test and the oil chromatography diagnostic test after faults.%介绍了一例在调试过程中出现的换流变压器绕组匝间绝缘故障导致的保护动作，直流系统退出运行案例。分析了换流变压器匝间短路故障过程，通过现场试验和解体分析，查找到绕组内部的故障点，指出可能是在运输和存放过程中因受潮导致变压器内部故障的发生，并对换流变压器交接试验和故障后油色谱诊断试验提出了改进建议。