超高频局放电磁波在变压器中的传播特性  

The propagation characteristic of E-M wave emitted by partial discharge in transformers

作　　者：王娟[1] 律方成[1] 蒋庆云 刘云鹏[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]厦门超高压公司,福建厦门361012

出　　处：《华北电力大学学报（自然科学版）》2007年第6期19-22,27,共5页Journal of North China Electric Power University：Natural Science Edition

摘　　要：分析了变压器中局部放电激发的超高频电磁波在油-纸复合绝缘中的传播特性,讨论了变压器绕组及箱体对电磁波传播的影响。实验室研究结果表明,超高频局放电磁波在油-纸复合绝缘中传播时会产生一定的衰减,但对电磁波的接收影响不大;变压器绕组因导体表面存在信号的反射及散射,其对超高频信号幅值有一定的衰减;变压器箱体可引起电磁波的严重衰减,实际检测时超高频传感器应内置。The propagation characteristics of E - M wave emitted by partial discharge （PD） in oil-paper composite insulation of transformers are investigated in this paper, and the effects of transformer winding and tank on wave propagation are also discussed. The experiments have been done in the lab. Results show that E - M wave propagated in oilpaper insulation attenuates, and it also attenuates in case of transformer winding. The transformer tank results in serious attenuation of E- M wave, so the sensor should be installed inside transformer tank.

关 键 词：变压器 超高频局部放电检测 电磁波 传播特性 衰减 

分 类 号：TM855[电气工程—高电压与绝缘技术]