Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment
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. Th...
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MDPI AG
2024-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/4/765 |
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| author | Samar Akef Ahdab M. K. El-Morshedy Mohamed M. Samy Ahmed M. Emam Hadeer H. El-Hawary |
| author_facet | Samar Akef Ahdab M. K. El-Morshedy Mohamed M. Samy Ahmed M. Emam Hadeer H. El-Hawary |
| author_sort | Samar Akef |
| collection | DOAJ |
| description | 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.8</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> against the experimental value of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>5</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> with an error of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.2</mn><mo>%</mo></mrow></semantics></math></inline-formula>. The calculated ground resistance value agrees reasonably well with that of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.7</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>6.5</mn><mo>%</mo></mrow></semantics></math></inline-formula>. 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. |
| first_indexed | 2024-03-07T22:34:17Z |
| format | Article |
| id | doaj.art-2670829877c84e1f8332d36a4be476c7 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-07T22:34:17Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2670829877c84e1f8332d36a4be476c72024-02-23T15:14:59ZengMDPI AGEnergies1996-10732024-02-0117476510.3390/en17040765Ground Resistance Estimation for a DC Converter Station: Theory versus ExperimentSamar Akef0Ahdab M. K. El-Morshedy1Mohamed M. Samy2Ahmed M. Emam3Hadeer H. El-Hawary4Electrical Power Department, Cairo University, Cairo 12613, EgyptElectrical Power Department, Cairo University, Cairo 12613, EgyptElectrical Engineering Department, Beni Suef University, Beni Suef 62511, EgyptElectrical Power Department, Cairo University, Cairo 12613, EgyptPhysics Department, Faculty of Science, Assiut University, Assiut 71515, EgyptThis 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.8</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> against the experimental value of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>5</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> with an error of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.2</mn><mo>%</mo></mrow></semantics></math></inline-formula>. The calculated ground resistance value agrees reasonably well with that of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>4.7</mn><mo> </mo><mo>Ω</mo></mrow></semantics></math></inline-formula> 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>6.5</mn><mo>%</mo></mrow></semantics></math></inline-formula>. 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.https://www.mdpi.com/1996-1073/17/4/765charge simulation techniqueground resistanceHVDC transmission linestep and touch potentialssurface potential |
| spellingShingle | Samar Akef Ahdab M. K. El-Morshedy Mohamed M. Samy Ahmed M. Emam Hadeer H. El-Hawary Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment Energies charge simulation technique ground resistance HVDC transmission line step and touch potentials surface potential |
| title | Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment |
| title_full | Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment |
| title_fullStr | Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment |
| title_full_unstemmed | Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment |
| title_short | Ground Resistance Estimation for a DC Converter Station: Theory versus Experiment |
| title_sort | ground resistance estimation for a dc converter station theory versus experiment |
| topic | charge simulation technique ground resistance HVDC transmission line step and touch potentials surface potential |
| url | https://www.mdpi.com/1996-1073/17/4/765 |
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