检测GIS局部放电的超高频微带贴片天线设计

检测GIS局部放电的超高频微带贴片天线设计

内容简介：设计了一种可提取局部放电超高频信号的微带天线，测试了天线的频率响应，并搭建了一套基于脉冲电流法和超高频法的局部放电检测系统，提取了SF6气体在针板间隙和绝缘介质内部空穴中的放电信号，比较分析了微带天线与高频罗戈夫式线圈的检测性能。结果表明：这种新型超高频天线能够有效提取局部放电信号，并且小型轻便，现场安装无需改变电气回路，抗干扰能力优于高频罗氏线圈，且能为放电类型的识别和干扰信号的排除提供参考，适于变电站GIS类设备的局部放电在线监测。

Abstract：A micro-strip antenna which can extract ultrahigh frequency(UHF) signal of partial discharge (PD) was designed. The frequency response of the antenna was tested, and a PD detection system based on the pulse current method and UHF method was designed to extract the PD signal of SF6 gas in the needle plate gap and internal hole of insulating medium. The detection properties of the micro-strip anten-na and the Rogowski coil were compared. The results show that the new small UHF antenna could effec-tively extract partial discharge signal, needn’t change the electrical circuit when used, and its anti-interfer-ence ability is better than that of Rogowski coil, which could provide references to the identification of discharge type and exclusion of interference signals, suitable for monitoring the PD of GIS equipment on-line.

作者：任重, 董明, 肖智刚, 毕建刚, 弓艳朋,

关键词：贴片天线, 局部放电, 超高频, SF6, 电磁脉冲,