GIS局部放电检测用阿基米德螺旋天线设计研究

Study on the design of Archimedes spiral antenna for GIS partial discharge detection

针对气体绝缘开关(gas insulated switchgear,GIS)设备局部放电现场检测的需求,文章设计了一种基本形式的阿基米德平面宽带螺旋天线,利用Ansoft HFSS电磁仿真软件对天线辐射单元的结构参数进行了优化,设计天线的尺寸为辐射面直径173.6 mm、天线高100 mm,并分析了阿基米德平面螺旋天线的辐射原理,通过仿真和测量研究了天线的端口参数和辐射性能。仿真及实测结果表明天线具有超宽带特性,在700~3000 MHz频段内的回波损耗小于-10 dB,最大增益不小于4 dB,满足局部放电检测天线指标要求。在实验室模拟局部放电试验并对天线的检测效果进行了测试,结果表明,设计的天线具有良好的检测性能,可用于GIS设备的局部放电现场检测。

Aiming at the demand of spot detection of partial discharge in gas insulated switchgear(GIS)equipment,this paper designed a basic form of Archimedes planar broadband spiral antenna,and used Ansoft HFSS electromagnetic simulation software to optimize the structural parameters of the antenna radiation unit.The designed antenna size is 173.6 mm in diameter of radiant surface and 100 mm in height.The radiation principle of the Archimedes planar spiral antenna was analyzed.The port parameters and radiation performance of the antenna were studied by simulation and measurement.The simulation and measured results show that the antenna has ultra-wideband characteristics,and the return loss is less than-10 dB and the maximum gain is not less than 4 dB in the frequency band of 7003000 MHz,which meets the requirements of partial discharge detection antenna.The partial discharge simulating test was made in the laboratory and the detection effect of the antenna was tested.The results show that the designed antenna has good detection performance and can be used for spot detection of partial discharge in GIS equipment.