A dynamic corona model for EMTP computation of multiple and non-standard impulses on transmission lines using a type-94 circuit component

The model computes the position of the corona space charge generated around the conductor to its diffusion at the conductor surface. An analysis for the computed results is made with an emphasis on the differences between the Q-V curves under impulse overvoltages of lightning, switching, oscillatory, and multiple-impulse type. Charge, electric field and voltage are related macroscopically in the model. The proposed model is verified by a comparison of the simulation results with measurements results available in the literature.