Analysis of grounding systems in soils with hemispherical layering

Author

Ma, J. ; Dawalibi, F.P. ; Daily, W.K.

Author_Institution

Safe Eng. Services & Technol. Ltd., Montreal, Que., Canada

Volume

8

Issue

4

fYear

1993

fDate

10/1/1993 12:00:00 AM

Firstpage

1773

Lastpage

1781

Abstract

A theoretical model for the analysis of power system grounding systems located inside or near hemispherical soil heterogeneities is presented. Exact closed-form analytical expressions for the earth potential calculations due to current sources in different regions of this soil structure are obtained. Numerical results are presented for different grounding systems and for different types of hemispherical soil volumes. The results clearly show that these finite hemispherical soil heterogeneities have a significant influence on the performance of grounding systems. The results obtained are in agreement with well known simple case results and converge asymptotically to the uniform soil case

Keywords

earthing; power system protection; soil; closed-form analysis; earth potential calculations; earthing; grounding systems; hemispherical soil heterogeneities; performance; power system protection; soil volumes; Conducting materials; Earth; Grounding; Lakes; Performance analysis; Power engineering and energy; Power system modeling; Power transformer insulation; Soil measurements; Substations;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.248284

Filename

248284