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Analytical fields expressions due to lightning channel considering variation of return stroke velocities along the lightning channel


Citation

Izadi, Mahdi and Ab Kadir, Mohd Zainal Abidin and Gomes, Chandima and Cooray, Vernon (2012) Analytical fields expressions due to lightning channel considering variation of return stroke velocities along the lightning channel. In: International Conference on Lightning Protection (ICLP), 2-7 Sept. 2012, Vienna, Austria. (pp. 1-5).

Abstract / Synopsis

The return stroke velocity is an important factor for evaluation of lightning electromagnetic fields. Measurements showed that the return stroke velocity is varied at different heights along lightning channel while it is usually entered into field calculations with a constant value in previous studies. This paper presents the analytical electromagnetic fields expressions due to vertical lightning channel where velocity profile along channel is considered. The proposed fields expressions can be used to estimate electromagnetic fields directly in the time domain (without needing to apply any extra conversion to Frequency domain) whereas they are based on Heidler current function and can support widely used engineering current models. Likewise, the proposed field expressions are applied on a typical measured profile of velocity and also a function of velocity profile and the evaluated fields are compared to the corresponding simulated fields based on constant value of velocity and the results are discussed accordingly.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/ICLP.2012.6344252
Publisher: IEEE
Keywords: Electromagnetic fields; Lightning channel; Return stroke velocity
Depositing User: Azian Edawati Zakaria
Date Deposited: 30 Jul 2015 08:38
Last Modified: 23 Feb 2017 21:40
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/ICLP.2012.6344252
URI: http://psasir.upm.edu.my/id/eprint/39678
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