A fast and accurate analysis of grounding resistance of a driven rodbed in a two-layer soil

Author

Elsherbiny, M.M. ; Chow, Y.L. ; Salama, M.M.A.

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

11

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

808

Lastpage

814

Abstract

A moment method of the Galerkin (variational) approach is applied to analyze the grounding resistances of driven rodbed of various configurations. Using this approach the resistance of a rodbed of N rods in two-layer soil requires only a matrix size of 2N×2N (two segments for each rod). The error in the calculated resistance is less than 4% compared to the resistance calculated by point matching moment method of large number of segmentation for each rod. The efficiency due to a small matrix with high accuracy allows an extensive parametric analysis of the rodbed. The study shows that a precise placement of the rods is not necessary to maintain a given resistance

Keywords

Galerkin method; earthing; electric resistance; matrix algebra; method of moments; power system protection; soil; Galerkin moment method; accuracy; driven rodbed; grounding resistance; matrix size; parametric analysis; point matching moment method; power systems; segmentation; two-layer soil; Current density; Earth; Electric resistance; Electrical resistance measurement; Grounding; Image segmentation; Moment methods; Performance evaluation; Power engineering computing; Soil; Soil measurements;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.489338

Filename

489338