An approximate expression for the equivalent resistivity of a two-layer soil

Author

Paulino, Jose Osvaldo S. ; Boaventura, Wallace C. ; Fonseca Barbosa, Celio

Author_Institution

Dept. de Eng. Eletr., Univ. Fed. de Minas Gerais, Belo Horizonte, Brazil

fYear

2013

fDate

7-11 Oct. 2013

Firstpage

231

Lastpage

235

Abstract

The lightning induced voltages on aerial and underground lines depend on the value of soil resistivity. Most calculating methodologies were developed considering the soil as a homogeneous and isotropic medium. However, actual soil is better represented if stratified into horizontal layers of different resistivity values. This paper presents a simplified expression for the calculation of the resistivity value of a uniform soil that can represent a two-layer stratified soil in lightning induced voltage calculations.

Keywords

geophysical techniques; lightning; soil; actual soil; aerial line; homogeneous medium; horizontal layers; isotropic medium; lightning induced voltage calculations; methodology calculation; resistivity value calculation simplified expression; soil resistivity value; two-layer soil equivalent resistivity approximate expression; two-layer stratified soil; underground line; uniform soil; Conductivity; Impedance; Lightning; Permittivity; Soil; Surface impedance; Wires; lightning-induced voltage; overhead distribution line; soil resistivity; stratified soil;

fLanguage

English

Publisher

ieee

Conference_Titel

Lightning Protection (XII SIPDA), 2013 International Symposium on

Conference_Location

Belo Horizonte

Print_ISBN

978-1-4799-1343-5

Type

conf

DOI

10.1109/SIPDA.2013.6729203

Filename

6729203