摘要
研究了变压器油中局部放电的频率特性 ,并与空气中局部放电的频谱特征作了比较 ;测量了超高频信号在金属油箱内及空气中的衰减特性及金属导线对超高频信号的辐射特性。研究结果表明 :变压器油中局部放电的频谱高于空气中局部放电的频谱 ;超高频信号在金属箱体内的传播具有振荡特性 ;
The frequency characteristics of partial discharge in transformer oil and in the air are studied, and the attenuating characteristics of ultra high frequency (UHF) signals in metal tank and in the air are measured in high voltage laboratory. The radiation of partial discharge signal in metal tank through a conductive wire is investigated in this paper too. The results show that the electromagnetic wave can be excited from the partial discharge in oil impregnated insulation with the frequency higher than that in the air. The propagating and attenuating characteristics of UHF signal in oil tank are different from that in the opening air. The experimental results also show that the UHF signal can be radiated from the inside of a metal tank through a conductive wire, which makes it possible to measure partial discharge of the power transformer with the coupler fixed at the outside of tank.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2002年第12期23-25,共3页
High Voltage Engineering
基金
博士后基金资助项目 (0 2 3 2 2 0 80 2 )
关键词
变压器油
局部放电
超高频检测
试验
ultra high frequency (UHF) partial discharge power transformer discharge model
