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Analytical Representation of Measured Lightning Currents and Its Application to Electromagnetic Field Estimation
Faculty of Electronic Engineering, Department of Power Engineering, University of Niš, Niš 18000, Serbia.ORCID iD: 0000-0002-2356-8710
Mälardalen University, School of Education, Culture and Communication, Educational Sciences and Mathematics. (MAM)ORCID iD: 0000-0003-3204-617X
Mälardalen University, School of Education, Culture and Communication, Educational Sciences and Mathematics. (MAM)ORCID iD: 0000-0001-9635-0301
Mälardalen University, School of Education, Culture and Communication, Educational Sciences and Mathematics. (MAM)ORCID iD: 0000-0003-4554-6528
(English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Lightning discharge currents waveshapes and their derivatives with multiple peaks are measured in artificially triggered lightning experiments and at instrumented tall towers. Such waveshapes are represented in this paper by the N-peaked analytically extended function (NP-AEF) and Marquardt least-squares method is applied for the estimation of its nonlinear parameters. Typical channel-base currents of the first negative, subsequent negative strokes, and positive strokes, based on comprehensive measurements by Berger et al. at Monte San Salvatore in Switzerland, are approximated by NP-AEFs and used in the computation of lightning electromagnetic fields. A new attenuation factor introducing nonlinear current attenuation along the channel is applied within the modified transmission line model (MTLSIN). A lightning return stroke is assumed to have a vertical discharge channel at the perfectly conducting ground. In order to validate this model, calculated lightning electromagnetic fields are compared with the typical, as measured by Lin et al. at various distances from the discharges. Lightning currents and their derivatives measured at the tall towers are also approximated by NP-AEFs. For the measured artificially triggered lightning currents, MTLSIN is applied for the calculation of their electromagnetic fields. These are compared with the measured fields of specific lightning strokes, so as to results of other models.

Place, publisher, year, edition, pages
IEEE.
Keywords [en]
Lightning measurement and modeling, natural and man-made electromagnetic noise, near-field modeling and measurements
National Category
Computational Mathematics Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Mathematics/Applied Mathematics
Identifiers
URN: urn:nbn:se:mdh:diva-38039DOI: 10.1109/TEMC.2017.2768549Scopus ID: 2-s2.0-85038364781OAI: oai:DiVA.org:mdh-38039DiVA, id: diva2:1174521
Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-03-29Bibliographically approved

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Publisher's full textScopushttp://ieeexplore.ieee.org/document/8168423/

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Lundengård, KarlRancic, MilicaSilvestrov, Sergei

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Computational MathematicsElectrical Engineering, Electronic Engineering, Information Engineering

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