Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment-Reference-Cited by-同舟云学术

Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment

Published:2024-02-06 Issue:4 Volume:17 Page:765
ISSN:1996-1073
Container-title:Energies
language:en
Short-container-title:Energies

Author:

Akef Samar¹^ORCID,El-Morshedy Ahdab M. K.¹,Samy Mohamed M.²,Emam Ahmed M.¹,El-Hawary Hadeer H.³^ORCID

Affiliation:

1. Electrical Power Department, Cairo University, Cairo 12613, Egypt

2. Electrical Engineering Department, Beni Suef University, Beni Suef 62511, Egypt

3. Physics Department, Faculty of Science, Assiut University, Assiut 71515, Egypt

Abstract

This paper is aimed at proposing a calculation model for the ground resistance of a grounding scheme servicing a high-voltage direct-current converter station. The method is based on the equivalence of current conduction and electric field from the grounding scheme through the surrounding medium. The grounding scheme is composed of three concentric ring electrodes supported by two horizontal conductors and eight vertical rods. The calculated ground resistance is 4.8 Ω against the experimental value of 5 Ω with an error of 4.2%. The calculated ground resistance value agrees reasonably well with that of 4.7 Ω as obtained using CYMGRD software (version 7.0). The calculated surface-potential values over the ground surface agreed reasonably well with those measured experimentally, with an average deviation not exceeding 6.5%. This study is designed to investigate how ground resistance is decreased by the increase in the scheme parameters, including the rods’ diameter and length, as well as the radius of the inner and outer rings. The dependency of the ground resistance on the soil type is also investigated.

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

Link

https://www.mdpi.com/1996-1073/17/4/765/pdf

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