Title :
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
fDate :
10/1/1993 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
