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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 266

The Impact of Multilayer Ground and Buried Conductors on Ground Potential Rising

G. Papaiz-Garbini1, L. Pichon2, M. Cucchiaro1, T. Hammi1 and N. Haddad1

1EMC Section, I&P.TL Department, SNCF Réseau, La Plaine St Denis, France
2Laboratoire Génie Electrique et Electronique de Paris, Gif sur Yvette, France

Full Bibliographic Reference for this paper
G. Papaiz-Garbini, L. Pichon, M. Cucchiaro, T. Hammi, N. Haddad, "The Impact of Multilayer Ground and Buried Conductors on Ground Potential Rising", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 266, 2016. doi:10.4203/ccp.110.266
Keywords: ground potential rising, grounding resistance, railway security, Wenner method, multilayer ground, multiconductor, finite element.

Summary
The electromagnetic modelling of phase-to-ground short-circuits in a railway environment is essential to optimize the protections against ground potential rising. Two particularly important points are defined: a) the determination of the ground structure in terms of its electric resistivity; b) the introduction in the model of a buried conductor in the zone of the phase-to-ground short-circuit. In this paper, ground resistivity will firstly be investigated. Different ground models will be compared. Secondly, the behaviour of the ground potential rising will be analysed with the presence or not of buried conductors. Different ground constructions will be used. Results are interpreted in term of the threshold given in EN 50122.

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