The lightning stroke as related to transmission-line performance part II

In the conclusion of this two-part article, the efficacy of ground wires in shielding the phase conductors is described in terms of the length of the striking distance of the downward leader. Upward concave return strokes, as well as repetitive strokes, have also been studied. The use of “pipe-pipe” gaps across insulator strings effectively improves the lightning performance of the line.