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DTSTART:20230326T030000
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DTSTAMP:20231104T203639Z
UID:C4C7CA0C-2085-4BEF-A2D9-0E933ABD0FD5
DTSTART;TZID=Europe/Zurich:20230504T140000
DTEND;TZID=Europe/Zurich:20230504T150000
DESCRIPTION:The behavior of the lightning current along the channel is extr
 emely important in the evaluation of the electromagnetic fields at various
  distances which may cause disturbances or faults on electric and electron
 ic equipment. While the current at the channel-base can be measured by mea
 ns of instrumented towers\, the current attenuation and propagation along 
 the channel is partially unknown. In this framework\, several models have 
 been developed based on the aim of reproducing the typical characteristics
  of the measured electromagnetic fields at various distances. In this lect
 ure\, another approach is proposed: the current attenuation is evaluated s
 tarting from the electromagnetic fields measurements. The process\, based 
 on the Tikhonov regularization technique that was derived to manage ill-po
 sed problems\, requires some preliminary analysis involving issues such as
  a suitable representation of the problem in the frequency-domain and the 
 investigation on the minimum time window in which one has to sense both th
 e channel base current and the fields to get a sufficient amount of inform
 ation on the attenuation function.\n\nCo-sponsored by: EMC Lab EPFL\n\nSpe
 aker(s): Prof. Daniele Mestriner\, Prof. Renato Procopio\n\nRoom: ELD 020\
 , Bldg: ELD 020\, EPFL\, Lausanne \, Switzerland\, Switzerland\, 1015
LOCATION:Room: ELD 020\, Bldg: ELD 020\, EPFL\, Lausanne \, Switzerland\, S
 witzerland\, 1015
ORGANIZER:mohammad.azadifar@epfl.ch
SEQUENCE:4
SUMMARY:Reconstruction of the lightning channel current starting from elect
 romagnetic fields measurements
URL;VALUE=URI:https://events.vtools.ieee.org/m/358796
X-ALT-DESC:Description: <br /><p style="font-weight: 400\;">The behavior of
  the lightning current along the channel is extremely important in the eva
 luation of the electromagnetic fields at various distances which may cause
  disturbances or faults on electric and electronic equipment. While the cu
 rrent at the channel-base can be measured by means of instrumented towers\
 , the current attenuation and propagation along the channel is partially u
 nknown. In this framework\, several models have been developed based on th
 e aim of reproducing the typical characteristics of the measured electroma
 gnetic fields at various distances. In this lecture\, another approach is 
 proposed: the current attenuation is evaluated starting from the electroma
 gnetic fields measurements. The process\, based on the Tikhonov regulariza
 tion technique that was derived to manage ill-posed problems\,&nbsp\; requ
 ires some preliminary analysis involving issues such as a suitable represe
 ntation of the problem in the frequency-domain and the investigation on th
 e minimum time window in which one has to sense both the channel base curr
 ent and the fields to get a sufficient amount of information on the attenu
 ation function.</p>
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