Identification of Lightning Strike on 500-kV Transmission Line Based on the Time-Domain Parameters of a Traveling Wave

This paper presents a novel and analytical approach to identifying a lightning strike after it has struck an overhead transmission line. The identification method is mainly based on the traveling waves' time-domain parameters, such as polarity, amplitude, and half-wavelength. The main differences in these parameters across different strike types are analyzed. Subsequently, a robust identification algorithm is proposed. An instrumentation system is implemented to verify the algorithm. The overall performances of the instrumentation system and the methodology are demonstrated using an on-site application with excellent results.