Equivalent resistivity of non-uniform soil for grounding grid design

Author

Thapar, Baldev ; Gerez, Victor

Author_Institution

Montana State Univ., Bozeman, MT, USA

Volume

10

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

759

Lastpage

767

Abstract

This paper develops a method to determine the equivalent resistivity of heterogeneous soils to be used in the available expressions for uniform soils employed to calculate the ground resistance, mesh and step voltages of substation grounding grids. The results obtained with the proposed equivalent resistivity are compared with the results obtained from the two layer and the multilayer models of the soil and with the results from a computer program, developed by the authors, directly based on the potential produced by a point source in heterogeneous soil

Keywords

design engineering; digital simulation; earthing; electrical resistivity; equivalent circuits; power system analysis computing; power system protection; soil; substations; computer program; earth; equivalent resistivity; heterogeneous soils; mesh voltage; nonuniform soil; point source; potential; power system grounding grids; simulation; step voltage; substation protection; Conductivity; Electrodes; Grid computing; Grounding; Nonhomogeneous media; Senior members; Soil measurements; Substations; Surface discharges; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.400855

Filename

400855