Propagation of the positive streamer-leader system in a 16.7 m rod-plane gap

Abstract

Experimental results concerning the propagation of a spark in a 16.7 m rod-plane gap are presented. Positive switching impulses are used. The parameters of the discharge are measured and the trajectory of the leader-leader corona system is studied as a function of time (withstand and breakdown events). Three main types of propagation are found: continuous, oscillatory and restrike. For each type, the propagation mechanisms of the leader-leader corona system are discussed from a physical point of view.