Modelling of partial discharge development in electrical tree channels

A model of partial discharge development in electrical tree structures is presented. The model considers channel conductivity, charge transport, and electric field redistribution during propagation of the discharge along the channels. It has been used for numerical investigation of temporal-spatial and electric characteristics of the partial discharges in capillaries and electrical trees exposed to AC voltage in a needle-plane geometry. The simulation results have been compared with experimental data given in the literature.