GIS局部放电检测用小型化平面螺旋天线研究

Research on Miniaturized Planar Spiral Antenna for GIS Partial Discharge Detection

随着变电站中气体绝缘金属封闭开关设备(GIS)的广泛应用,局部放电检测逐渐成为发现故障隐患的重要手段。基于超高频(UHF)局部放电的检测原理,设计了一种工作于UHF频段的小型化天线。该天线基于传统阿基米德平面螺旋天线,利用一种振幅随着幅角线性增加的新型正弦波加载方式对天线进行进一步的小型化处理。通过HFSS软件进行仿真和试验验证,结果表明该天线在端口性能、方向性能以及增益等方面均满足局部放电检测的要求;同时天线尺寸较小,使用时易于安装,后续在GIS设备局部放电现场检测中有较大应用前景。

With the wide application of Gas-Insulated Metal-Enclosed Switchgear(GIS)in substations,partial discharge detection has gradually become an important means to find hidden faults.Based on the detection principle of Ultra-High Frequency(UHF)partial discharge,a miniaturized antenna working in UHF frequency band was designed in this paper.The antenna is based on the traditional Archimedes spiral antenna,and a new sine wave loading method with linear amplitude increase with amplitude angle is used to further miniaturize the antenna.The simulation and experimental verification of HFSS software show that the antenna meets the requirements of partial discharge detection in terms of port performance,directional performance and gain;at the same time,the antenna size is small,and it is easy to install when used which has a great application prospect in the subsequent on-site detection of partial discharge of GIS equipment.