Modeling of the Influence of Corona on the Transmission Lines during Lightning Discharge

The corona discharge in the cylindrical geometry is numerically simulated for the negative lightning voltage impulse. The simulation is performed by solving the drift-diffusionreaction equations for the electrons, the positive and the negative ions. The results for the concentration of charge particles and the intensity of the electric field are used to determine the corona current which is in turn necessary for the calculation of the transient overvoltages on the transmission lines.