基于OPGW光传感输电线路雷击波形特点分析

Analysis of lightning stroke waveform characteristics of transmission line based on OPGW

光纤复合架空地线(OPGW)以其独特的优越性在电力系统智能状态监测领域得到了快速发展和应用,文章对OPGW光偏振态雷击故障定位方法中光纤传感雷击信号波形问题进行研究。首先利用ATP-EMTP软件建立输电线路模型仿真得到雷击OPGW时的电气数据,然后基于法拉第磁光效应原理将电信号转换为OPGW内部光纤中的光偏振态信号,此方法可用于仿真计算出雷击OPGW时光信号传播数据。实际输电线路上安装的OPGW雷击定位系统数据验证了仿真结果的准确性,结果表明OPGW光传感输电线路雷击波形受雷电流大小影响较大且不同于传统的电流行波雷击波形。

Optical fiber composite overhead ground wire （OPGW） has been rapidly developed and applied in the intelligent monitoring of power system with its unique superiority. In this paper, a problem of optical fiber sensor lightning signal waveform is studied, which is based on the new method of OPGW polarization state. Firstly, the ATP- EMTP software is used to establish the transmission line model simulation to get the electric data when the lightning strikes OPGW, then, based on the Faraday magneto optic effect principle, the electrical signal is converted into the optical polarization signal in the OPGW internal optical fiber, and this method can get better OPGW optical sensing transmission line lightning waveform, and the accuracy of the simulation results is verified by the data of OPGW lightning location system installed on the actual transmission line. The results show that the lightning current waveform of OPGW optical transmission line is greatly affected by lightning current and is different from the traditional current traveling waveform.