Influence of Lightning Current Steepness on Calculated Backflashover Probability

Accurate calculation of backflashover probability is crucial for determining transmission line performance. However, lightning current parameters have a significant impact on the calculated backflashover probability values. Thus, it should be estimated which lightning current parameters are crucial for the calculations of those values. The purpose of this work is to estimate the impact of lightning current steepness on backflashover probability. It was demonstrated that the probability distribution of lightning current steepness, has a great impact on calculated backflashover probability. In addition, the correlation between the current steepness and amplitude should be taken into account in calculations.