Research on discharge behaviors of short SF6-gap with dielectric-covered electrodes under standard lightning impulse

Based on the electron, ion continuity and momentum transfer equations coupled to Poisson´s formula, one dimensional and self-consistent fluid model of the short SF₆ gap discharge is used, meanwhile, the academic analysis is rigorously carried out and the significative phenomena are revealed during the breakdown of short SF₆ gap with dielectric-covered electrodes under the lightning impulse voltages. Furthermore, some relations to the structural parameters of the model are discovered through computer-aided simulation, i.e, the spatial-temporal characteristics of the charged particle, space field distribution, as well as the discharge-channel evolution in the short SF₆ gap over the breakdown process, which have not been found before, help us deeply understand and utilize them in some fields.