Locating Lightning Strikes in Transmission Lines Using Electromagnetic Time Reversal Method Based on Criterion of Voltage Energy

This paper presents the electromagnetic time reversal method based on voltage energy criterion to identify the location of lightning strikes. Compared with the current energy as a criterion, it is no need to set up a series of short-circuit branches and calculate the normalized value of each branch, thus avoiding changing the topology of the transmission line. In this study, an electromagnetic transient simulation model of transmission line is constructed, based on which the effect of electromagnetic time reversal method using voltage criterion to locate lightning faults is investigated. It shows that, while greatly reducing the calculation and workload, this method is able accurately identify the location of lightning strike, point of flashover or back-flashover and reach the same accuracy and effect compared with the criterion of current energy.