The Dielectric barrier effect, means using of additional insulation layer (a barrier) placed between electrodes, can significantly increase the breakdown voltage of insulation gap. Charge accumulation on the surfaces of the barrier leads to changes in the electric field distribution and, hence, in the electric loading (potential drop) of the different parts of the insulation system. This paper presents a developed model for charge transfer in homogeneous electrode systems consisting of a gas gap between two parallel-plates. The electron conservation is described by the electron density continuity equation using the drift-diffusion approximation. The analogous equation is applied for electron energy conservation. The transportation of heavy species, means non-electron species, is formulated based on the mixture-averaged approximation. The source terms are extracted based on plasma chemistry. These equations are coupled with Poisson's equation for computing electric fields affected by temporal and spatial variations of space charges in the system. This model is used to predict the maximum insulation withstand voltage of gas insulated systems with barriers.
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