摘要
针对目前输电线路的雷击监测定位问题,提出一种基于希尔伯特-黄变换(HHT)的输电线路雷击点定位方法。OPGW遭受雷击时其内部通信光纤中传输光由于法拉第(Faraday)效应产生偏振态突变信号,首先对偏振态信号进行降噪,然后对降噪处理后的偏振态信号进行希尔伯特-黄变换和处理得到其幅值、频率随时间变化的图谱,从而得到偏振态突变信号到达偏振态解调设备的时刻来进行雷击点定位。结果表明,HHT可以准确的反映OPGW雷击点处光偏振态突变信息,具有较高的定位精度和可靠性,为实现输电线路雷击点更高精度和更快速的检测定位提供了新的方法和思路。
Aiming at the lightning monitoring and localization problem of current transmission lines,a Hilbert-Huang transform ( HHT) based lightning strike point location method for transmission lines is proposed. When the OPGW is struck by lightning,the transmitted light in the internal communication fiber generates a polarization state abrupt signal due to the Faraday effect. First,the polarization state signal is denoised,and then the Hilbert-Huang transform is performed on the denoised processed polarization signal. And processing to obtain a map of its amplitude and frequency as a function of time,thereby obtaining a moment when the polarization state abrupt signal reaches the polarization state demodulation device to perform lightning strike point positioning. The results show that HHT can accurately reflect the information of optical polarization state mutation at the lightning strike point of OPGW,which has high positioning accuracy and reliability,and provides a new method and idea for realizing higher precision and faster detection and location of lightning strike points on transmission lines.
作者
曾宪武
李生福
李伟
ZENG Xian-wu;LI Sheng-fu;LI Wei(Zunyi Power Supply Bureau,Guizhou Power Grid Co. ,Ltd,Zunyi 56300,China;State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200000,China)
出处
《功能材料与器件学报》
CAS
2018年第3期174-178,共5页
Journal of Functional Materials and Devices
基金
国家重点研发计划(No.2016YFB0400901)
关键词
偏振态
降噪
希尔伯特-黄变换
雷击点定位
polarization state
de-noising
Hilbert-Huang transform
lightning strike point location
