Non-linear behaviour of LEMP excited power lines terminated on surge-arresters

The transient analysis of non-linearly loaded power lines is carried out. The line is excited by indirect lightning and the analysis is performed in the time domain, where the line is represented as an equivalent dynamic m-port and the effects of the lightning excitation are taken into account through equivalent independent sources. The analysis has been carried our taking into account the effects of the finite ground conductivity. Furthermore, an accurate model has been used for the non-linear surge-arresters, to take into account dynamic effects.