检测GIS局部放电的小型准TEM喇叭天线

检测GIS局部放电的小型准TEM喇叭天线

内容简介：为克服目前气体绝缘组合电器（GIS）局部放电检测外置传感器的缺点，设计了一种外置小型准TEM喇叭天线传感器，它采用介质填充、楔形立体微带和背腔结构优化等技术手段，既可使喇叭天线小型化，又能得到优良的驻波比特性，可方便地从盆式绝缘子处接收局部放电产生的电磁泄漏信号，并能有效抑制周围空间低频电磁干扰。理论计算和实验室实测特性数据表明，该宽带天线在超高频（UHF）频段内，有较好的检测性能，并具有多频段选择特性。最后，在实验室GIS模拟缺陷装置上，将TEM喇叭天线与已有的微带贴片天线进行了局放测量效果的对比。

Abstract：An outer-positioned small quasi-TEM horn antenna sensor was designed and constructed for detecting the partial discharge in gas insulation substations （GIS）, which could expediently receive the electromagnetic wave leaked from the basin type insulator, and effectively suppress low frequency electromagnetic interference from sur- roundings. Certain effective structures such as dielectric filled horn, wedge-shaped substrate and backing cavity were utilized to miniaturize during the antenna design process so as to optimize standing-wave ratio characteristics. The model calculation and experimental data measured in the laboratory shows that the antenna possesses a good radia- ting performance and a multi-band property when working in the ultrahigh frequency （UHF） band. The partial dis- charge was tested in the device of imitation GIS defect, detected by TEM horn antenna and existing microstrip patch antenna concurrently, then, the measurement results were compared.

作者：张晓星, 谌阳, 唐俊忠, 文习山,

关键词：气体绝缘组合电器(GIS), 局部放电, 超高频(UHF), 介质填充, 微带天线, TEM喇叭天线,