Identification of Lightning Strike and Fault in Traveling Wave Protection of Transmission Lines
CHEN Sitong
Abstract：In order to explore the influence of high frequency transient signal caused by lightning strike on traveling wave protection of transmission lines,a lightning strike and fault identification method based on integral criterion is proposed. In the case of no fault,the symmetrical current waveform caused by lightning stroke and the asymmetrical current waveform caused by fault in a very short time interval are used to integrate the transient current waveform above and below the time axis respectively. By comparing their relative ratios and thresholds,the main criterion of lightning strike and fault recognition is constructed. In order to improve the reliability of lightning and fault identification,additional criteria are also defined according to their differences. Simulation results and analysis show that the proposed integral criterion can be used for lightning stroke and fault identification,and the reliability of lightning stroke and fault identification can be improved by combining the main criterion with the additional criterion.
Keywords：transmission linestraveling wave protectionlightning strokewaveform characteristicsfault identification
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1342-1346,1399 )