Numerical simulation of the current pulses of positive corona discharge in SF6

This paper investigates the current pulses of positive corona discharge in SF
6
at 0.4MPa. The 2D axisymmetric point-plane model is applied. Three continuity equations for electrons, positive ions and negative ions are combined with Poisson’s equation to predict the current pulses in positive corona discharge. In addition, the photoionization is simulated by adding a constant term in the continuity equations of electrons and positive ions. The current pulses, the distribution of the charged species are presented.