摘要
为了研究绝缘子放电声发射检测中不同放电形式的声发射识别问题,系统地研究绝缘子内部放电声发射现象。在大量试验基础上,总结绝缘子内部放电声发射波的共有特征绝缘子内部放电声发射波具有简单的周期性,正半周和负半周内之间的信号不对称决定于气隙的特征线尺度D。随传感器的安放位置变化,接收到信号的外形从箭头状向蛋状变化;引入量纲分析理论,研究了气体的初始密度、压力、放电能量、气隙的形状和特征线尺度等因素对内部放电声发射的影响;结合气体放电理论和波动理论探讨并解释了内部放电声发射现象的机理。
During Acoustics Emission （AE） monitoring of insulator discharge, discharge type identifying are very important. Interior discharge of noncomposite insulators is researched systematically. Based on numerous experiments the common characteristic of AE wave from interior discharge is summarized： The AE waves have regular periodicity and they appear twice in every work voltage period, non-symmetry between them is determined by eigen scale D of interior flaw of insulator. AE wave change from egg shape to arrowhead shape when transducer is closing to the discharge source; Dimensional methods in mechanics are introduced into AE analysis and then it is be found that AE wave is determined mainly by initial discharge energy, flaw shapes, the eigen scale of flaw, the density and the press of interior gas in flaw; Combining wave theory and gas discharge theory AE phenomena are explored and explained.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第10期146-151,共6页
Proceedings of the CSEE
关键词
绝缘子
内部放电
声发射
量纲分析
insulator
interior discharge
acoustic emission
dimensional methods
