摘要
为分析一台大功率高频高压变压器的故障原因,搭建了试验平台并对该故障变压器和同等规格的无故障变压器进行了空载试验和波形录制;采用电流波形比较法对比分析了试验波形以总结其波形特点;根据变压器的绝缘结构提出了考虑寄生参数的等效电路并给出简化工作电路。研究表明空载电流大是由分布电容引起,而非气隙异常导致。通过电流波形比较,得出高压线包(层、匝)间绝缘击穿的故障结论,与拆卸观察结果相符合。
In order to analyze the fault reason of a high power high frequency high voltage transformer, a test platform was established,zero-load test and wave-recording of a fault transformer and a normal transformer were carried out, and the wave characteristic was analyzed. Taking combination of the insulation structure of the transformer, an equivalent circuit of the transformer considering distribution parameters was put forward, and a simplified equivalent circuit was put forward. First, the fault reason which may lead to growth of inputting zero-load current of the transformer is stray capacitances other than air gap abnormity. Second, through the method of current wave comparing, the conclusion that the transformer fault is caused by the insulation breakdown of high voltage winding can be drawn. The diagnosis result is authenticated through the observation after dismantlement of the transformer.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第5期1049-1053,共5页
High Voltage Engineering
关键词
大功率
高频
高压
绝缘
变压器
试验
故障分析
high power
high frequency
high voltage
insulation
transformer
test
fault analysis
