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Analysis for the Reflected Waves Transmitted on to the Channel by Tall Grounded Objects Using a Special Case
High Voltage Laboratory, Dept of Electrical Engineering, Indian Institute fo Science, Bengaluru, Indien.
High Voltage Laboratory, Dept of Electrical Engineering, Indian Institute fo Science, Bengaluru, Indien.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2012 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 54, no 2, 262-271 p.Article in journal (Refereed) Published
Abstract [en]

During lightning strike to a tall grounded object (TGO), reflected current waves from TGO are transmitted on to the channel. With regard to these transmitted waves, there seems to be some uncertainties like: 1) will they get reflected at the main wavefront; and 2) if so, what would be their final status. This study makes an attempt to address these issues considering a special case of strike to a TGO involving equal channel core and TGO radii. A macroscopic physical model for the lightning return stroke is adopted for the intended work. Analysis showed that the waves transmitted on to the channel merges with the main wavefront without any sign of reflection. Investigation revealed that: 1) the nonlinear spatio-temporal resistance profile of the channel at the wavefront is mainly responsible for the same; and 2) the distributed source provides additional support. The earlier findings are not limited to the special case of TGO considered. In spite of considering equal TGO and channel core radii, salient features of the model predicted remote electromagnetic fields agree well with the measured data reported in literature.

Place, publisher, year, edition, pages
2012. Vol. 54, no 2, 262-271 p.
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Science of Electricity
Identifiers
URN: urn:nbn:se:uu:diva-164272DOI: 10.1109/TEMC.2011.2161316ISI: 000303008700004OAI: oai:DiVA.org:uu-164272DiVA: diva2:467107
Available from: 2011-12-19 Created: 2011-12-19 Last updated: 2017-12-08Bibliographically approved

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