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- Title
Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment.
- Authors
Akef, Samar; El-Morshedy, Ahdab M. K.; Samy, Mohamed M.; Emam, Ahmed M.; El-Hawary, Hadeer H.
- 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.
- Subjects
ELECTRIC currents; ELECTRIC conductivity; ELECTRIC fields; SOIL classification; SURFACE potential
- Publication
Energies (19961073), 2024, Vol 17, Issue 4, p765
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en17040765