Ebadollah Amouzad Mahdiraji - Islamic Azad University of Sari Branch, University of Science and Technology of Mazandaran
Nabiollah Ramezani - Islamic Azad University of Sari Branch, University of Science and Technology of Mazandaran

In this paper, the behavior of the grounding system at different frequencies with considering soil ionization effect has been investigated under lightning impulse with and without the corona phenomenon. Also using EMTP-RV software, a model of corona with two different grounding systems was constructed at the UHV alternating current transmission line and the effect of soil ionization changes and corona pulses were shown in the voltage signals and it was found that the corona phenomenon causes voltage signal attenuation and damping and increasing the wave front time. Also it has been shown that the high-frequency grounding system has a higher validity than the low-frequency grounding system. The induced voltage and charged current on the transmission line of power system has been studied. This study is performed to show the positive impact of corona and grounding system with soil ionization on induced voltage.

Transient Modeling, corona phenomenon, lightning impulse, grounding system, soil ionization.