Alternative solution for the Chowdhuri-Gross model of lightning-induced voltages on power lines

According to a previous study, the induced voltage due to any current shape in the lightning channel can be obtained through the application of the Duhamel integral to the induced voltage due to a step current in the lightning channel. The authors present an alternative expression for the Chowdhuri-Gross model, using a method different from that previously employed. This expression gives the induced voltage directly in terms of the inducing voltage due to a step current. The simplicity of the expression is particularly evident when calculating the induced voltage due to a ramp current. The expression for this induced voltage is used to obtain induced voltage pulse shapes due to a current with a linearly-rising front. Good agreement is obtained with a previously published plot