GIS PD检测柔性内置小型化阿基米德螺旋天线传感器  

Flexible Built-in Miniature Archimedes Spiral Antenna Sensor for PD Detection in GIS

作　　者：张国治 陈康 李晓涵 王堃[1] 方荣行 刘健犇 ZHANG Guozhi;CHEN Kang;LI Xiaohan;WANG Kun;FANG Rongxing;LIU Jianben(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Hubei University of Technology,Wuhan 430068,China;State Key Laboratory of Power Grid Environmental Protection,Wuhan 430074,China)

机构地区：[1]湖北工业大学新能源及电网装备安全监测湖北省工程研究中心,武汉430068 [2]电网环境保护国家重点实验室,武汉430074

出　　处：《高电压技术》2022年第6期2244-2254,共11页High Voltage Engineering

基　　金：电网环境保护国家重点实验室开放基金(GYW51202101362)。

摘　　要：气体绝缘组合电器(gas insulated switchgear, GIS)的外壳为圆筒型结构,而现有局部放电(partial discharge,PD)特高频(ultra high frequency, UHF)检测天线多采用FR-4环氧树脂刚性基底,天线内置到GIS内部时可能会影响设备内部的电场分布,或需要对GIS的法兰盘进行复杂的结构改造,不利于现场应用。为解决上述问题,设计了一种基于热固性聚酰亚胺柔性基底的UHF阿基米德螺旋天线传感器,且采用正弦加载的方法实现了天线直径的小型化。通过仿真和实测分析了该柔性天线的辐射特性,然后通过仿真分析了该柔性天线内置对GIS内部电场的影响,同时利用搭建的试验平台对其PD检测性能进行了实测。结果表明:该柔性天线直径为149 mm,较未小型化时缩小了24.7%,本体质量仅为15.1 g;在620 MHz~3 GHz频带内,该柔性天线在弯曲半径分别为0、250、300和350mm时的电压驻波比均不超过2.5,最大实际增益为5.5dB,在0.3~1.5GHz频带内的平均有效高度达到13.5 mm,辐射性能优异;实际安装时可忽略该柔性天线对GIS内部电场分布的影响,且其在弯曲形变前后及内置后均能有效检测PD信号。研究成果为内置式天线传感器的设计提供了参考。The shell of a gas insulated switchgear(GIS) is a cylindrical structure, while the FR-4 epoxy resin rigid base is mostly utilized in the existing partial discharge(PD) ultra-high-frequency(UHF) detection antennas. When they are installed into the GIS, the electric field distribution inside the equipment may be affected, or complex structural transformation is required on the flange of the GIS, which is unsuitable for application. To solve these problems, a UHF Archimedean spiral antenna sensor based on thermosetting polyimide flexible substrate was designed and the antenna diameter was miniaturized by using the sinusoidal loading method. The radiation feature of the flexible antenna was analyzed by simulation and measurements. Then, the influence of its built-in on the internal electric field of the GIS was analyzed by simulation. Meanwhile, its PD detection performance was measured by using the built test platform. The results show that the diameter of the designed flexible antenna is 149 mm, which is 24.7% smaller than that without miniaturization, and the weight of the antenna is only 15.1 g. In the band of 620 MHz~3 GHz, the voltage standing wave ratio of the flexible antenna is less than 2.5 when the bending radius is 0, 250, 300 or 350 mm, and the maximum realized gain is 5.5 dB. The average effective height of the flexible antenna in the band of 0.3~1.5 GHz is 13.5 mm. Thus, its radiation performance is excellent. The influence of the flexible antenna on the electric field distribution inside the GIS can be ignored when it is installed, and PD signals can be effectively detected before and after its bending deformation and after its built-in. The research results provide a reference for the design of built-in antenna sensors.

关 键 词：GIS PD 特高频柔性天线 热固性聚酰亚胺 小型化 

分 类 号：TN823.31[电子电信—信息与通信工程] TP212[自动化与计算机技术—检测技术与自动化装置]