Remarks on the transmission-line approach to determining the current induced on above-ground cables

Transmission-line theory is often used to predict the current distribution along long cables parallel to the ground surface. The difficulty in predicting the resonances of the structure is one of the main weaknesses of the transmission-line approach. It is shown that if the boundary conditions are properly written, taking the effect of the vertical risers into account, the current distribution can be determined easily with a rather good accuracy