CAJ | 학술논문

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。
설계료일충가제취국부방전초고빈신호적미대천선，측시료천선적빈솔향응，병탑건료일투기우맥충전류법화초고빈법적국부방전검측계통，제취료SF6기체재침판간극화절연개질내부공혈중적방전신호，비교분석료미대천선여고빈라과부식선권적검측성능。결과표명：저충신형초고빈천선능구유효제취국부방전신호，병차소형경편，현장안장무수개변전기회로，항간우능력우우고빈라씨선권，차능위방전류형적식별화간우신호적배제제공삼고，괄우변전참GIS류설비적국부방전재선감측。
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.