PEEC simulation of lightning over-voltage surge with corona discharges on the over head wires

Abstract

In this paper, a simplified corona discharge model is adopted with a partial element equivalent circuit (PEEC) method in the time domain for simulation of lightning over-voltage surge. Effects of corona discharge to the voltage distortion and the electromagnetic coupling of the overhead wires are presented. In addition, the effect on the voltage measuring system to the induced voltage on its nearby parallel wire is presented and discussed. The corona progression from an overhead wire, to which a high voltage impulse is applied, is represented by the radial expansion of the conducting region. Undesired oscillations of the computed waveforms found in the authors’ previous paper have been discarded by iteration process for calculation of the corona radius and the voltage of each PEEC element at each calculated time step. To confirm the validity of the presented model with the PEEC method, the calculated results are compared with experimental results. The calculated results agree well with the corresponding experimental ones. This shows that the PEEC method in the time domain with the corona model is of use in simulations of lightning surges propagating along overhead wires.