A Compact UHF Antenna Based on Hilbert Fractal Elements and a Serpentine Arrangement for Detecting Partial Discharg  

作　　者：Xiang Lin Jian Fang Ming Zhang Kuang Yin Yan Tian Yingfei Guo Qianggang Wang 

机构地区：[1]Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,China Southern Power Grid,Guangzhou,510620,China [2]State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing,400044,China

出　　处：《Energy Engineering》2024年第5期1127-1141,共15页能源工程（英文）

摘　　要：Efforts to protect electric power systems from faults have commonly relied on the use of ultra-high frequency(UHF)antennas for detecting partial discharge(PD)as a common precursor to faults.However,the effectiveness of existing UHF antennas suffers from a number of challenges such as limited bandwidth,relatively large physical size,and low detection sensitivity.The present study addresses these issues by proposing a compact microstrip patch antenna with fixed dimensions of 100 mm×100 mm×1.6 mm.The results of computations yield an optimized antenna design consisting of 2nd-order Hilbert fractal units positioned within a four-layer serpentine arrangement with a fractal unit connection distance of 3.0 mm.Specifically,the optimized antenna design achieves a detection bandwidth for which the voltage standing wave ratio is less than 2 that is approximately 97.3%of the UHF frequency range(0.3–3 GHz).Finally,a prototype antenna is fabricated using standard printed circuit board technology,and the results of experiments demonstrate that the proposed antenna is capable of detecting PD signals at a distance of 8 m from the discharge source.

关 键 词：Power system fault partial discharge UHF antenna fractal antenna micro-strip antenna 

分 类 号：TN820[电子电信—信息与通信工程]