WSEAS Transactions on Power Systems
Print ISSN: 1790-5060, E-ISSN: 2224-350X
Volume 13, 2018
Harmonic Impedance of Horizontal Grounding Electrode under Soil Ionization Effect
Authors: ,
Abstract: One of faults that occur in electric power system is due to the striking of lightning current pulses. The current in lightning pulse is up to some kilos of ampere and has high content of frequency. The main objective of grounding system is taking these pulses to earth. Due to high current in pulses the soil ionization effect takes place. This paper presents harmonic impedance of horizontal grounding electrode when it is hit by fast lightning current pulses. Also, this study takes into account soil ionization effect. As well as, in this paper a comparison between harmonic impedance when soil ionization effect is taken into account or not, is done. 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 considered in this study.
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Keywords: Current pluses, soil conductivity, soil ionization effect, transmission line approach, transient impedance
Pages: 200-208
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1790-5060 / 2224-350X, Volume 13, 2018, Art. #20