摘要
为了诊断主变压器绕组是否发生变形,开展短路阻抗及绕组频率响应测试。针对一起短路阻抗超过注意值的主变压器,通过分析其高、中、低压侧相间误差变化趋势、绕组频率响应波形及运行工况,综合诊断得出其绕组已发生严重变形,通过吊心检查证实了诊断结论。
In order to detect and diagnose the winding deformation of main transformers, the tests of short - circuit impendence and winding frequency response are carried out. Aiming at a main transformer whose short - circuit impendence exceeds the at- tention value, its winding is diagnosed to be seriously deformed through analyzing variation trend of phase errors, waveform of winding frequency response and operating condition in high - voltage side, middle - voltage side and low - voltage side. The diagnosis result is verified by the core suspension and inspection.
出处
《四川电力技术》
2016年第1期41-44,共4页
Sichuan Electric Power Technology
关键词
变压器
绕组变形
诊断
transformer
winding deformation
diagnosis
