摘要
针对变电站气体绝缘组合电器(GIS)绝缘缺陷局部放电(PD)高灵敏监测需求,以及现有刚性基底特高频(UHF)天线传感器内置安装的复杂工艺和内置后存在破坏设备内部电场分布的风险问题,该文提出柔性特高频传感技术。设计了一款柔性UHF螺旋天线传感器,采用正弦波加载的方式以及提高天线本体间隙比的方式实现了天线本体小型化,同时巴伦与天线本体共面,大幅减小了天线整体体积,设计的柔性天线直径为150 mm,较未小型化径向距离缩小了25%。仿真和网分实测结果表明:在610 MHz~3 GHz频带范围内,柔性天线在弯曲半径为0 mm、100 mm、200 mm时的电压驻波比(VSWR)≤3.5;在790 MHz~1.8 GHz频段内VSWR≤2。最后利用搭建GIS典型缺陷局部放电模拟试验平台对设计的柔性天线进行PD检测性能实测。结果表明,设计的柔性天线在不同弯曲程度下均能有效检测到PD信号,具有较高的信噪比。
In view of the high sensitive detection requirements of partial discharge detection for insulation defects of gas-insulated substation(GIS)in substation,the complicated process of built-in installation of the existing UHF antenna sensor with rigid base and the risk of damaging the internal electric field distribution of the equipment after built-in installation.This paper puts forward the research of flexible UHF sensing technology,combines the antenna body with the flexible material,and reduces the volume of the built-in rear antenna on the premise of ensuring the performance of the antenna to meet the requirements,so as to simplify the complex built-in process and the problem of damaging the electric field distribution.In this paper,a flexible UHF spiral antenna sensor is designed.The antenna body is miniaturized by means of sine wave loading and increasing the gap ratio of the antenna body.At the same time,Balun is co-planar with the antenna body,greatly reducing the overall volume of the antenna.The PD detection performance of the antenna was measured by building a GIS typical defect partial discharge simulation experiment platform.The results show that the flexible antenna can effectively detect PD signals under different bending degrees and has a high signal-to-noise ratio.Firstly,the common Archimedes spiral antenna was combined with the flexible material PI to build the antenna simulation model,and the performance simulation of the unbent antenna and the antenna with different bending degrees was carried out.Through the simulation of antenna voltage standing wave ratio and direction diagram,it can be seen that antenna body bending has little influence on antenna performance.Then,the common Archimedes spiral antenna is loaded in the form of sine wave.In this way,the size of the antenna body can be effectively reduced.The size and diameter of the designed antenna is 150 mm,and the radial distance is reduced by 25%compared with that without miniaturization.The antenna model can be bent arbitrarily to improve
作者
张国治
韩景琦
刘健犇
陈康
张硕
Zhang Guozhi;Han Jingqi;Liu Jianben;Chen Kang;Zhang Shuo(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment Hubei University of Technology,Wuhan 430068 China;State Grid Electric Power Research Institute Wuhan Nanrui Co.Ltd,Wuhan 430074 China;School of Power and Mechanical Engineering Wuhan University,Wuhan 430072 China;State Key Laboratory of Power Grid Environmental Protection China Electric Power Research Institute,Wuhan 430074 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2023年第4期1064-1075,共12页
Transactions of China Electrotechnical Society
基金
电网环境保护国家重点实验室开放基金资助项目(GYW51202101362)。
关键词
气体绝缘组合电器
局部放电
特高频柔性天线
小型化
间隙比
Gas-insulated substation(GIS)
partial discharge(PD)
UHF flexible antenna
miniaturization
ratio of metal width arm space(RMWAS)
