This paper presents the frequency effect on transient impedance of horizontal grounding electrode, when it hits by fast front current pulses that have very high frequency content. This study takes into account frequency dependence of soil electrical parameters. Two models based on experimental and measurements data by Messier (M) and Visacor-Alipio (VA) are presented. Transmission line (TL) approach is used within this study. The effect of soil electrical parameters, length of grounding electrode, and type of lightning stroke are taken into account in this study.

The frequency of lightning strikes significantly affects the transient impedance of horizontal grounding electrodes, with soil electrical parameters, electrode length, and lightning type playing a role.

The frequency effect on transient impedance of horizontal grounding electrode

Key Takeaway: The frequency of lightning strikes significantly affects the transient impedance of horizontal grounding electrodes, with soil electrical parameters, electrode length, and lightning type playing a role.