摘要
GIS内部的局部放电会在腔体中激励超高频(UHF)电磁波信号,局部放电信号可通过超高频传感器进行检测。为研究UHF信号在GIS中的传播特性,在GIS内设置了导体尖端和悬浮电位放电模型,内置式传感器的信号与用示波器在盆式绝缘子浇注孔测试到的UHF信号进行比较。试验结果表明,UHF信号在GIS内有一定的衰减,外置式传感器测得的信号比内置式的衰减大。
Ultra-high-frequency （UHF） electromagnetic signals can be radiated by partial discharge （PD） in gas insulated switchgear （GIS）. The partial discharge signals are detected by UHF sensors. In order to analyze the propagation characteristics of UHF signals in GIS, conductor point/floating potential discharge model is estab- lished, and signal from inlayed sensor and UHF signal from plug hole of disc insulator by oscilloscope are compared. The experimental result indicates that UHF signal in GIS attenuates, and the attenuation of signal by exteral sensor is greater than that by internal sensor.
出处
《浙江电力》
2012年第11期1-4,共4页
Zhejiang Electric Power
关键词
GIS
局部放电
超高频
电磁波
检测
GIS
partial discharge
ultra-high-frequency
electromagnetic wave
detection
