Influence of frequency-dependent soil electrical parameters on the grounding response to lightning

Pedrosa, Adriana G.; Schroeder, Marco Aurélio O.; Alípio, Rafael; Visacro, Silvério

doi:10.1109/iclp.2010.7845953

Cited by 3 publications

(2 citation statements)

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“…In publications [8,[10][11][12][13][14][15][16][17][18][19][20][21][22][23], many different concepts of grounding models for surge current conditions are presented. In this paper, the simplified model is considered, where constant radius r x of the grounding ionized space is assumed for the electrode's entire length.…”

Section: Horizontal Electrode Grounding Modelmentioning

confidence: 99%

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Bulletin of the Polish Academy of Sciences: Technical Sciences

Łukaszewski,

Nogal

2021

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Groundings are necessary parts included in lightning and shock protection. In the case of a surge current, high current phenomena are observed inside the grounding. They are a result of the electrical discharges around the electrode when the critical field is exceeded in soil. An available mathematical model of grounding was used to conduct computer simulations and to evaluate the influence of current peak value on horizontal grounding parameters in two cases. In the first simulations, electrodes placed in two different soils were considered. The second case was a test of the influence of current peak value on grounding electrodes of various lengths. Simulation results show that as soil resistivity increases in value, the surge impedance to static resistance ratio decreases. In the case of grounding electrodes lengths, it was confirmed that there is a need to use an operating parameter named effective grounding electrode length, because when it is exceeded, the characteristics of grounding are not significantly improved during conductance of lightning surges. The mathematical model used in the paper was verified in a comparison with laboratory tests conducted by K.S. Stiefanow and with mathematical model described by L. Grcev.

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Section: Horizontal Electrode Grounding Modelmentioning

confidence: 99%

“…The specific value for the grounding may be identified by the results of computer simulations, experimental records or analytical estimation. Surge impedance coefficient A is defined by the formula [9]: Influence of lightning current surge shape and peak value on grounding parameters length l eff [17]:…”

Section: Grounding Simulation Model In Pspicementioning

confidence: 99%