Analysis of the impact of the lightning return stroke models on overhead transmission lines induced voltages

The lightning return stroke channel current modelling is one of the most discussed topics in Electromagnetic Compatibility due to its difficult to be measured. In literature, the most used are the engineering models, based mainly on defining a function that involves the propagation and the attenuation of the current along the return stroke channel. This paper presents the effects of the different engineering models on the lightning induced voltages on a distribution line. The analysis is performed taking into account the influence of the finite ground conductivity, different line terminations as well as different points of stroke location. The main differences between each model are presented lingering on the effects on rise time, peak voltage and tails behavior.