Dynamic features of DC flashover on polluted insulators.

In the existing literature dealing with flashover simulation or theoretical studies, the discharge is considered to have a tubular form of uniform diameter, and its evolution is simply its foot displacement at the surface of the pollution or of the ice, while it maintains its tubular form. After presentation of the equivalent electric circuit for flashover simulation, an experimental study is presented, the purpose of which is to determine the difference between the theoretical dynamic features of flashover, based on the tubular-formed discharge assumption, and the real dynamic features. The results clearly confirm the difference between the two groups of dynamic features and that the theoretical dynamic features are the sum of the static points. [ABSTRACT FROM AUTHOR]