LAPSE:2020.0728
Published Article
LAPSE:2020.0728
On the Distribution of Lightning Current among Interconnected Grounding Systems in Medium Voltage Grids
Guido Ala, Salvatore Favuzza, Elisa Francomano, Graziella Giglia, Gaetano Zizzo
June 23, 2020
This paper presents the results of a first investigation on the effects of lightning stroke on medium voltage installations’ grounding systems, interconnected with the metal shields of the Medium Voltage (MV) distribution grid cables or with bare buried copper ropes. The study enables us to evaluate the distribution of the lightning current among interconnected ground electrodes in order to estimate if the interconnection, usually created to reduce ground potential rise during a single-line-to-ground fault, can give place to dangerous situations far from the installation hit by the lightning stroke. Four different case studies of direct lightning stroke are presented and discussed: (1) two secondary substations interconnected by the cables’ shields; (2) two secondary substations interconnected by a bare buried conductor; (3) a high voltage/medium voltage station connected with a secondary substation by the medium voltage cables’ shields; (4) a high voltage/medium voltage station connected with a secondary substation by a bare buried conductor. The results of the simulations show that a higher peak-lowering action on the lighting-stroke current occurs due to the use of bare conductors as interconnection elements in comparison to the cables’ shields.
Keywords
bare buried rope, full-wave, grounding, lightning current, Lightning Protection System (LPS), lightning stroke, metal shields
Suggested Citation
Ala G, Favuzza S, Francomano E, Giglia G, Zizzo G. On the Distribution of Lightning Current among Interconnected Grounding Systems in Medium Voltage Grids. (2020). LAPSE:2020.0728
Author Affiliations
Ala G: Department of Energy, Information Engineering and Mathematical Models (DEIM)—University of Palermo, viale delle Scienze-Edificio 9, 90128 Palermo, Italy
Favuzza S: Department of Energy, Information Engineering and Mathematical Models (DEIM)—University of Palermo, viale delle Scienze-Edificio 9, 90128 Palermo, Italy [ORCID]
Francomano E: Department of Industrial and Digital Innovation (DIID)—University of Palermo, viale delle Scienze-Edificio 8, 90128 Palermo, Italy
Giglia G: Department of Energy, Information Engineering and Mathematical Models (DEIM)—University of Palermo, viale delle Scienze-Edificio 9, 90128 Palermo, Italy [ORCID]
Zizzo G: Department of Energy, Information Engineering and Mathematical Models (DEIM)—University of Palermo, viale delle Scienze-Edificio 9, 90128 Palermo, Italy [ORCID]
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Journal Name
Energies
Volume
11
Issue
4
Article Number
E771
Year
2018
Publication Date
2018-03-28
Published Version
ISSN
1996-1073
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Original Submission
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PII: en11040771, Publication Type: Journal Article
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LAPSE:2020.0728
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doi:10.3390/en11040771
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Jun 23, 2020
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CC BY 4.0
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Jun 23, 2020
 
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Jun 23, 2020
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Original Submitter
Calvin Tsay
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