Calculation of the grounding resistance of structures located on elevated terrain

Sunjerga, Antonio (Swiss Federal Institute of Technology, Lausanne, Switzerland) ; Rachidi, Farhad (Swiss Federal Institute of Technology, Lausanne, Switzerland) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Poljak, Dragan (Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia)

We present an analysis of the response of a grounding electrode located on top of a mountain. Specifically, we derive an analytical solution for the low-frequency response of a hemispheric grounding electrode buried on the top of a cone-shaped mountain characterized by its apex angle. The derived equation is validated using numerical simulations based on the Finite Element Method obtained using COMSOL. Simulation results show that, for the same ground electrical parameters, the grounding resistance of such an electrode for steep mountains can be significantly higher than that obtained if the electrode is on flat ground. Such situations can occur in particular for the case of telecommunication towers or wind turbines located on mountaintops. The study emphasizes the importance of considering the terrain profile in the evaluation of the grounding resistance of structures located in elevated locations.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Subject(s):
Ingénierie
Date:
2019-12
Pagination:
4 p.
Published in:
IEEE Transactions on Electromagnetic Compatibility
Numeration (vol. no.):
2019, vol. 61, no 6, pp. 1891 - 1895
DOI:
ISSN:
0018-9375
Appears in Collection:

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 Record created 2021-07-15, last modified 2021-07-16

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