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Lightning induced currents in isolated towers

Kumar, Udaya and Ajay, Sruthi (2014) Lightning induced currents in isolated towers. In: International Conference on Lightning Protection (ICLP), OCT 11-18, 2014, Tsinghua Univ, Shanghai, PEOPLES R CHINA, pp. 1684-1690.

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During a lightning strike to ground or structure nearby, currents are induced in all conducting structures including tall towers. As compared to the case of a direct strike, these induced currents will be of much lower amplitude, however, appear more frequently. A quantitative knowledge on these induced currents will be of interest to instrumented and communication towers. A preliminary analysis on the characteristics of the induced currents was reported in an earlier work 1], which employed simplifications by neglecting the induced charge on the tower and also the contribution from the upward connecting leader. This work aims to make further progress by considering all the essential aspects in ascertaining the induced currents. For determining the field produced by the developing return stroke, a macro-physical model for the return stroke is employed and for the evaluation of the induced currents, an in-house time domain numerical electromagnetic code along with suitable modifications for incorporating the dynamics of upward leader is employed.

Item Type: Conference Proceedings
Publisher: IEEE
Additional Information: Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords: Towers; induced currents; lightning; induced charge; upward leader
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 03 Sep 2015 06:33
Last Modified: 03 Sep 2015 06:33
URI: http://eprints.iisc.ac.in/id/eprint/52302

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