Transmission Mains Earthing Design and Concrete Pole Deployments

Authors: M. Nassereddine, J. Rizk, A. Hellany, M. Nagrial

Abstract:

The High Voltage (HV) transmission mains into the community necessitate earthing design to ensure safety compliance of the system. Concrete poles are widely used within HV transmission mains; which could have an impact on the earth grid impedance and input impedance of the system from the fault point of view. This paper provides information on concrete pole earthing to enhance the split factor of the system; further, it discusses the deployment of concrete structures in high soil resistivity area to reduce the earth grid system of the plant. This paper introduces the cut off soil resistivity SC ρ when replacing timber poles with concrete ones.

Keywords: Concrete Poles, Earth Grid, EPR, High Voltage, Soil Resistivity.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334882

References:

[1] Nassereddine M, Hellany A, Nagrial M. Rizk J. "Soil Resistivity Structure and its implication on the Earth Grid of HV substation" 2011 World Academy of Science, engineering and Technology , Vol 60, pp 1322-1326, (ORS ID: 222496)
[2] Nassereddine M, Hellany A, Rizk J, 2009, How to design an effective earthing system to ensure the safety of the people, 2009 International Conference on Advances in Computational Tools for Engineering Applications, pp 416-421, (ORS ID: 210202)
[3] IEEE guide to safety in AC substation grounding, 2000- (IEEE, New York, 2000).
[4] Eugene J. "The Use of Concrete-Enclosed Reinforcing Rods as Grounding Electrodes" 1970 IEEE Transaction on Industry and General Applications, Vol. IGA-6, No 4
[5] Nassereddine M, Hellany A, Nagrial M, "Analysis of the impact of the OHEW under full load and fault current" 2010, International Jurnal of Energy and Environment (IJEE), Volume 1, Issue 4, pp. 727-736. (ORS ID: 216605)
[6] Nassereddine M, Hellany A. "OHEW Earthing Design Methodology of Traction Substation" 2010 World Academy of Science, engineering and Technology, Vol 66, no. 0, pp 1644-1648, ISSN 2070-66, (ORS ID:217809)
[7] Nassereddine M, Hellany A, Nagrial M. Rizk J. " Safety Compliance of Substation Earthing Design" 2011 World Academy of Science, engineering and Technology , Vol 60, pp 525-529, (ORS ID: 222495)
[8] Wiener P. "A Comparison of Concrete Encased Grounding Electrodes to Driven Ground Rods" 1969 IEEE Industrial and Commercial Power Systems, and Electric Space Heating and Air-conditioning Joint Technical Conference, Paper 69 TP 149-IGA
[9] Dawalibi F. "Effects of Sustained Ground Fault Current on Concrete poles", 1982 IEEE Transactions on Power Apparatus and Systems, Vol. PAS-101