Design of distribution substation earth grid in high resistivity soil using CDEGS

S. D. Buba, W. F. Wan Ahmad, M. Z.A. Ab Kadir, C. Gomes, J. Jasni, M. Osman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Design of distribution substation earthing grid can be very challenging in high resistivity soils especially in two layer soils where the top layer resistivity is lower than the bottom layer. This paper presents the design of a distribution substation earth grid using Current Distribution Electromagnetic Field Grounding Soil Structure Analysis Software (CDEGS). Soil resistivity measurement was carried out at the substation site using a 4-pole Megger earth tester based on Wenner method. The soil structure was determined using RESAP module, while the design was implemented using SESCAD and executed by MALT module. Results indicated a slight reduction of earth grid resistance, 0.6%, 5.8% and 6.5%, respectively as the grid burial depth was varied from 0.5m to 1.5m in steps of 0.5m. The touch and step voltages were found to be lower when surface layer material was not applied and higher when surface layer materials of 3000Q-m and 5000Q-m resistivity were interchangeably applied on the grid surface. It was also found that, the calculated earth grid resistance from IEEE Std. 80-2000 equation was lower than the grid resistance computed by MALT.

Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014
PublisherIEEE Computer Society
Pages508-513
Number of pages6
ISBN (Print)9781479924219
DOIs
Publication statusPublished - 01 Jan 2014
Event2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014 - Langkawi, Malaysia
Duration: 24 Mar 201425 Mar 2014

Publication series

NameProceedings of the 2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014

Other

Other2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014
CountryMalaysia
CityLangkawi
Period24/03/1425/03/14

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Buba, S. D., Wan Ahmad, W. F., Ab Kadir, M. Z. A., Gomes, C., Jasni, J., & Osman, M. (2014). Design of distribution substation earth grid in high resistivity soil using CDEGS. In Proceedings of the 2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014 (pp. 508-513). [6814482] (Proceedings of the 2014 IEEE 8th International Power Engineering and Optimization Conference, PEOCO 2014). IEEE Computer Society. https://doi.org/10.1109/PEOCO.2014.6814482