Impulse Efficiency of Grounding Electrodes: Effect of Frequency-Dependent Soil Parameters

Author

Alipio, Rafael ; Visacro, Silverio

Author_Institution

Lightning Res. Center-LRC, Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil

Volume

29

Issue

2

fYear

2014

fDate

Apr-14

Firstpage

716

Lastpage

723

Abstract

The effect of frequency-dependent soil resistivity and permittivity on the lightning response of electrodes subjected to representative currents of first and subsequent strokes was analyzed. Expressions for expediting the estimate of the impulse impedance, effective length, and impulse coefficient from the measured low-frequency resistance and soil resistivity that take this frequency dependence into account were proposed for some electrode arrangements of practical interest. The estimates were shown to be consistent with the results simulated using an elaborate model and with experimental results.

Keywords

earth electrodes; electrical resistivity; lightning protection; permittivity; soil; effective length; frequency-dependent soil parameter effect; frequency-dependent soil resistivity effect; grounding electrodes; impulse coefficient; impulse efficiency; impulse impedance estimation; lightning response; measured low-frequency resistance; permittivity; Conductivity; Electrodes; Frequency dependence; Grounding; Impedance; Lightning; Soil; Frequency dependence of soil resistivity and permittivity; impulse efficiency of grounding electrodes; lightning response of grounding electrodes;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2013.2278817

Filename

6776500