Research on antenna for detecting the corona discharge of transmission line

• Main Authors: Yunfeng Xia, Xinming Song, Zhidong Jia, Xilin Wang, Jinfeng Qi, Zheng Xu
• Format: Article
• Language: English
• Published: Wiley 2019-01-01
• Series: The Journal of Engineering
• Subjects: log periodic antennas; corona; electromagnetic wave polarisation; transmission lines; charge measurement; electric field measurement; magnetic field measurement; signal detection; UHF antennas; VHF antennas; UHF detectors; UHF measurement; frequency 200.0 MHz to 350.0 MHz; fast Fourier transform; high frequency oscillation wave; time domain signal; electromagnetic signal detection; circularly polarised log-periodic antenna design; electromagnetic wave measurement; corona discharge detection; circularly polarised log-periodic antenna; RF antenna; transmission line
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8392

Detection of corona discharge of the transmission line can reflect its health status and provide warning information for maintenance. Some existing detection methods are flawed and cannot be used widely. This study presents a new method by measuring the electromagnetic wave caused by corona discharge with RF antenna. Then a circularly polarised log-periodic antenna was designed by making two pairs of log-periodic antennas 90° orthogonal. Finally, this antenna was simulated and manufactured to detect electromagnetic signals, the result shows that the time domain signal of corona discharge is a high frequency oscillation wave and its fast Fourier transform main distributes between 200 and 350 MHz.