Transient modeling of transmission lines components with respect to corona phenomenon and grounding system to reduce the transient voltages caused by lightning Impulse

In this paper, the behavior of the grounding system at different frequencies has been investigated under lightning conditions with and without the corona phenomenon. Also using EMTP-RV software, a model of Corona with two different earth systems was constructed at the high voltage alternating current transmission line and the effect of soil resistance changes and corona pulses were shown in the voltage signals across the insulator 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