Analytical expressions for lightning electromagnetic fields with arbitrary channel-base current - part I : theory

Brignone, Massimo (Naval, ICT and Electrical Engineering Department, University of Genoa, Genova, Italy) ; Procopio, Renato (Naval, ICT and Electrical Engineering Department, University of Genoa, Genova, Italy) ; Mestriner, Daniele (Naval, ICT and Electrical Engineering Department, University of Genoa, Genova, Italy) ; Rossi, Mansueto (Naval, ICT and Electrical Engineering Department, University of Genoa, Genova, Italy) ; Delfino, Frederico (Naval, ICT and Electrical Engineering Department, University of Genoa, Genova, Italy) ; Rachidi, Farhad (EMC Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

The article provides analytical expressions for the electromagnetic fields generated by a lightning return stroke characterized by a channel-base current with arbitrary time waveform, in presence of either a perfectly conducting or a lossy ground, assuming the transmission line model for the current along the channel. In this second case, a time-domain analytical expression for the Cooray–Rubinstein formula is presented. The main idea that leads to the derivation of analytical formulas consists of dividing the channel into intervals in which the distance between the field source point and the observation point can be approximated with a linear function of the time, and of the spatial coordinates of both points. In the companion aticle, a detailed comparison is proposed with the classical (numerical) approach highlighting an excellent agreement both at close and far distances, considering all the values of practical interest for the ground conductivity. Moreover, the method guarantees a meaningful improvement in computational performance.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Date:
2020-09
Pagination:
9 p.
Published in:
IEEE Transactions on Electromagnetic Compatibility
Numeration (vol. no.):
early access
DOI:
ISSN:
0018-9375
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-10-13, last modified 2020-10-27

Fulltext:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)