On the evaluation of the effective height of towers : the case of the Gaisberg tower

Smorgonskiy, Alexander (EMC Laboratory, EPFL, Lausanne, Switzerland) ; Rachidi, Farhad (EMC Laboratory, EPFL, Lausanne, Switzerland) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Korovkin, Nikolay (Department of Theoretical Bases of electrical Engineering, St.-Petersburg State University, St.-Petersburg, Russia)

In this paper, we present the calculation of the effective height of the Gaisberg tower using several models in which the Gaisberg Mountain is represented by either simplified geometrical shapes (hemisphere and hemiellipsoid), or by using the actual 3D topography. The procedure to estimate the effective height based on the comparison of the electric field at the top of the tower located on flat and mountainous terrains is studied in detail for the three considered representations of the mountain. For each case, the electric field is computed numerically using the finite element method. We show that the use of the actual 3D topography of the mountain surface results in a very low value of the effective height in the range of 200 - 300 m, which results in an underestimation of the total number of flashes to the tower. The obtained results give some concerns about the applicability of this method of estimation for the effective height.


Keywords:
Conference Type:
short paper
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Publisher:
Vienna, Austria, 2-7 September 2012
Date:
2012-09
Vienna, Austria
2-7 September 2012
Pagination:
4 p.
Published in:
Proceedings 2012 International Conference on Lightning Protection (ICLP), 2-7 September 2012, Vienna, Austria
DOI:
ISBN:
978-1-4673-1897-6
Appears in Collection:

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 Record created 2020-07-07, last modified 2020-07-09

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