Impedance nature of long horizontal grounding electrode employing TLM

This investigation is devoted to analyse the impedance behaviour of long horizontal grounding electrodes as function of frequency for several soil resistivity values. The real and imaginary parts of grounding impedance have been analysed in order to characterize its nature at several points along the electrode. We show that the impedance increase reflects its inductive behaviour. This impedance increases with the grounding electrode length. For high soil resistivities, resonant peaks appear. They are attenuated with the electrode length increase.