Zhang Hanting, Zhang Guozhi, Zhang Xiaoxing, Tian Hanlu, Lu Changyue, Liu Jianben, Zhang Yin
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, China Electric Power Research Institute, Wuhan 430074, China.
Sensors (Basel). 2022 Jul 1;22(13):4982. doi: 10.3390/s22134982.
In view of the insufficient signal detection sensitivity of Gas Insulated Switchgear (GIS), partial discharge (PD), ultra-high frequency (UHF), and failure to conform with GIS surface structure when the existing rigid stereo structure UHF sensor is built in, this paper, using rectangular patch antenna equivalent technique, trapezoidal ground plane technique, and coplanar waveguide (CPW) feed line index asymptotic linearization technique, conducts research on a flexible built-in high-sensitivity elliptic monopole antenna. The flexible antenna, with a thickness of only 0.28 mm, can be kept at a voltage standing wave ratio (VSWR) of less than three in the 300 MHz to 3 GHz band under the curvature radius of 0, 100, 300, and 500 mm, and at less than two in the 650 MHz to 3 GHz band. Through the true 220 kV-GIS partial discharge experimental platform built to analyze the high frequency electromagnetic wave detection performance of the built-in flexible antenna, it is shown that the flexible built-in high-sensitivity elliptical monopole antenna designed in this paper can effectively detect the characteristic signals of high-frequency electromagnetic waves emitted by partial discharges with an average discharge amount below 10 pC.
针对气体绝缘开关设备（GIS）信号检测灵敏度不足、存在局部放电（PD）、超高频（UHF）问题，以及现有刚性立体结构UHF传感器内置时不符合GIS表面结构的情况，本文采用矩形贴片天线等效技术、梯形接地平面技术和共面波导（CPW）馈线指数渐近线性化技术，对一种柔性内置高灵敏度椭圆单极天线进行了研究。该柔性天线厚度仅为0.28毫米，在曲率半径为0、100、300和500毫米的情况下，在300兆赫至3吉赫频段内电压驻波比（VSWR）可保持在小于3，在650兆赫至3吉赫频段内小于2。通过搭建真实的220 kV - GIS局部放电实验平台来分析内置柔性天线的高频电磁波检测性能，结果表明本文设计的柔性内置高灵敏度椭圆单极天线能够有效检测平均放电量低于10皮库的局部放电所发射的高频电磁波特征信号。
