Lightning stroke fault identification method and system

• Main Authors: ZOU YU, LIANG YUAN, ZHOU MIN, TANG ZEYUAN, MAI HAIBO, SU YIFENG, XIE ZHENJUN, SONG YINGUAN, WANG MING, SHI ZHIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2017
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a lightning stroke fault identification method and system. The lightning stroke fault identification method comprises the following steps of reading valid fault waveform information in a local database, performing wavelet transform multi-resolution analysis on the valid fault waveform information, and obtaining a fault waveform; analyzing the frequency of the fault waveform to obtain a ratio of the wavelet energy of the transient current additional component of the fault waveform at a preset high-frequency band to the wavelet energy of the transient current additional component of the fault waveform on a preset low-frequency band; according to the ratio of the wavelet energy, identifying whether the line fault type of a transmission line is non-fault lightning stroke to obtain an identification result; if the identification result is indicative of no, obtaining the energy distribution characteristic data of the fault waveform; according to the energy distribution characteristic data,