On the effect of the finite ground conductivity on electromagnetic field radiated by lightning to tall towers

Cooray, Vernon (University of Uppsala, Uppsala, Sweden) ; Diendorfer, Gerhard (ALDIS, Austria) ; Nucci, Carlo Alberto (University of Bologna, Bologna, Italy) ; Pavanello, Davide (EPFL, Lausanne, Switzerland) ; Rachidi, Farhad (EPFL, Lausanne, Switzerland) ; Becerra, Marley (University of Uppsala, Uppsala, Sweden) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

In this paper it is shown how the finitely conducting ground modifies the signature of the radiation field of return strokes striking tall towers. Results are presented for different tower heights and for different ground conductivities varying the current risetime in the return stroke model. The results show that the attenuation of the initial peak of the radiation field resulting from the propagation over finitely conducting ground depends strongly on the current risetime, the tower height and the ground conductivity. In general, the attenuation of the radiation field of lightning flashes striking tall towers is larger than that striking flat ground. In the case where the ground conductivity is extremely poor, namely 0.0001 S/m, the attenuation of the peak radiation field may reach as much as 70% in the case of lightning flashes striking a 300- m tall tower.


Keywords:
Conference Type:
published full paper
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Publisher:
Kanazawa, Japan, 18-22 September 2006
Date:
2006-09
Kanazawa, Japan
18-22 September 2006
Pagination:
pp. 267-272
Published in:
Proceedings of the 28th International Conference on Lightning Protection ICLP, 18-22 September 2006 Kanazawa, Japan
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2021-02-05, last modified 2021-02-12

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