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A distributed‐circuit return‐stroke model allowing time and height parameter variation to match lightning electromagnetic field waveform signatures
Author(s) -
Visacro S.,
De Conti A.
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl024336
Subject(s) - lightning (connector) , waveform , electromagnetic field , transmission line , inductance , channel (broadcasting) , computation , computer science , capacitance , electric power transmission , acoustics , equivalent circuit , representation (politics) , physics , electronic engineering , electrical engineering , voltage , algorithm , telecommunications , engineering , power (physics) , electrode , quantum mechanics , politics , law , political science
A new lightning return‐stroke model based on a distributed circuit approach is formulated. The DNUTL (Dynamic Non‐Uniform Transmission Line) model allows the computation of the time and height dependence of the channel parameters and contemplates the corona sheath and core losses representation. The capacitance and inductance of the channel are calculated by applying an original approach based on simple recursive equations. Electromagnetic fields generated by the DNUTL model at several distances from the channel base are presented for a given set of parameters. The obtained results indicate that the proposed model is able to successfully reproduce the main features of electromagnetic field waveshapes associated to natural and triggered lightning.