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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
Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, Utbildningsvetenskap och Matematik. (MAM)ORCID-id: 0000-0003-3204-617X
Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, Utbildningsvetenskap och Matematik. (MAM)ORCID-id: 0000-0001-9635-0301
Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, Utbildningsvetenskap och Matematik. (MAM)ORCID-id: 0000-0003-4554-6528
2017 (Engelska)Ingår i: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, ISSN 0018-9375, Vol. 60, nr 5, s. 1415-1426Artikel i tidskrift (Refereegranskat) Published
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.

Ort, förlag, år, upplaga, sidor
IEEE, 2017. Vol. 60, nr 5, s. 1415-1426
Nyckelord [en]
Lightning measurement and modeling, natural and man-made electromagnetic noise, near-field modeling and measurements
Nationell ämneskategori
Beräkningsmatematik Elektroteknik och elektronik
Forskningsämne
matematik/tillämpad matematik
Identifikatorer
URN: urn:nbn:se:mdh:diva-38039DOI: 10.1109/TEMC.2017.2768549ISI: 000438903100033Scopus ID: 2-s2.0-85038364781OAI: oai:DiVA.org:mdh-38039DiVA, id: diva2:1174521
Anmärkning

Paper has been published:

online december 2017

print october 2018

Tillgänglig från: 2018-01-15 Skapad: 2018-01-15 Senast uppdaterad: 2018-10-01Bibliografiskt granskad

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Fulltext saknas i DiVA

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Förlagets fulltextScopushttp://ieeexplore.ieee.org/document/8168423/

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Lundengård, KarlRancic, MilicaSilvestrov, Sergei

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Javor, VesnaLundengård, KarlRancic, MilicaSilvestrov, Sergei
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IEEE transactions on electromagnetic compatibility (Print)
BeräkningsmatematikElektroteknik och elektronik

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