摘要
研究了油中针-板放电模型在电力变压器模型内部不同位置放电时,铁芯和绕组模型对UHF局部放电在线检测系统的影响。结果表明,内部主要结构部件对UHF局放射频信号能量有明显衰减作用,对UHF检波信号幅值有一定程度的衰减作用,但并未发现对检测灵敏度有显著影响,也未发现存在检测"盲区"。
This paper quantificationally studies the power transformer winding ferrite core models how to influence our UHF partial discharge(PD) detection system,when point-plane models discharge in the transformer model as changing of PD source locations. The result shows that the winding ferrite core models make the UHF electromagnetic energy decay obviously,weaken the statistical average amplitudes of UHF detection signal,but we nearly can detect the events of PD sensitively wherever they happen in the power trans...
出处
《福建电力与电工》
2007年第2期12-14,23,共4页
Fujian Power and Electrical Engineering
关键词
电力变压器
局部放电
超高频
在线检测
power transformers
partial discharge
UHF
on-line detection
