EM fields generated by lightning channels with arbitrary location and slope

Lupo, Giuseppe; Petrarca, C.; Tucci, Vincenzo; Vitelli, M.

doi:10.1109/15.831703

Cited by 30 publications

(28 citation statements)

References 15 publications

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“…Their paper presented results which confirm that channel inclination considerably affects the electromagnetic fields at close distances. Lupo et al [7], in their analysis, treated each tortuous path as a single line radiator with an arbitrary slope and height. They were able to develop closed-form solutions for the electromagnetic fields by omitting any mathematical approximations.…”

Section: Literary Backgroundmentioning

confidence: 99%

“…This consequence stems from the fact that as time varying current elements begin to follow a more staggered path, each current segment will respond by altering its orientation, thus generating electric and magnetic fields that respond accordingly. This response will give rise to electric and magnetic fields which are spatially nonlinear with areas of low field intensities [7] as well as high field intensities.…”

Section: Literary Backgroundmentioning

confidence: 99%

See 1 more Smart Citation

How Lightning Tortuosity Affects the Electromagnetic Fields by Augmenting Their Effective Distance

Meredith

Earles²,

Kostanic³

et al. 2010

PIER B

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Abstract-A novel approach for developing the electromagnetic fields from a lightning return stroke which follows a tortuous path will be presented. The proposed model is unique in that it recognizes that the symmetrical tortuosity of lightning directly impacts the observable distance r, which in turn, alters the resulting electromagnetic fields. In the literature, lightning return stroke models typically employ the assumption that the cloud-to-ground path is straight. Although this assumption yields fairly consistent results across an array of varying approaches, it does not account for lightning's natural physical appearance. Furthermore, straight-line models only account for the cloud-to-ground discharges and do not address branching and/or cloudto-cloud discharges which are far more common. In reality, the "steps" which make up the lightning channel's initial descent are staggered or tortuous with respect to each other. Given this fact, the upward traveling current wavefront which follows this prescribed path will exhibit the same characteristics. In doing so, each current segment, which forms along its respective step, induces electromagnetic fields with angular aggregates that propagate outward from their origin. This, in turn, will generate spatial points where there are fields of higher and lower intensities. The results presented in this paper will show how the effective observable distance due to symmetrical tortuosity alters the resulting electromagnetic fields. Furthermore, it will be shown that as the observable distance r is increased, results from the proposed model closely resemble the straight-line model which strongly suggests that symmetrical tortuosity is only influential at relatively close distances.

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Section: Literary Backgroundmentioning

confidence: 99%

Section: Literary Backgroundmentioning

confidence: 99%

How Lightning Tortuosity Affects the Electromagnetic Fields by Augmenting Their Effective Distance

Meredith

Earles²,

Kostanic³

et al. 2010

PIER B

View full text Add to dashboard Cite

show abstract

“…(3), where c is the speed of light. The detailed calculations of the field can be found in [25] and [26]. …”

Section: Calculation Of Electric Fieldmentioning

confidence: 99%

“…For EM fields calculation, the analytical approach adopted in [25] has been implemented, needing a simple analytical representation of the single discharge current, travelling an arbitrarily oriented channel C as a function of time and space. In particular, it is possible to calculate the step response analytically by assuming that a unit step-function current travels along the channel:…”

Section: Calculation Of Electric Fieldmentioning

confidence: 99%

“…In order to predict the fields, the authors employed the Fraunhofer approximation, and consequently their results were limited to far-field computation (i.e., 100 km from the base of the channel). A significant contribution to overcome such a limitation was published in [25], where a closed-form solution for the fields generated by a lightning channel with arbitrary location and slope was given, without introducing any approximation in the analytical field calculation. In [26], the results were also extended to a computer-generated tortuous channel, made of a series of arbitrarily oriented straight segments, treated individually.…”

Section: Introductionmentioning

confidence: 99%

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On the Influence of Channel Tortuosity on Electric Fields Generated by Lightning Return Strokes at Close Distance

Petrarca¹,

Minucci²,

Andreotti³

2017

PIER B

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Abstract-In this paper the results of the estimated electric field associated with tortuous lightning paths at close distance (50 m to 500 m) are shown. Such results are compared with experimental data available in the literature and are illustrated along with a quantitative analysis of the field waveforms and their frequency spectra. The limits of the usual straight-vertical channel assumption and the influence of tortuosity at different azimuth and distances from the lightning channel base are also highlighted.

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The Similarity Between the Derivative of LEMP and Its Approximate Result for Oblique Channel in Near Area

Wang

Chen

Wan

et al. 2013

Lecture Notes in Electrical Engineering

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EM fields generated by lightning channels with arbitrary location and slope

Cited by 30 publications

References 15 publications

How Lightning Tortuosity Affects the Electromagnetic Fields by Augmenting Their Effective Distance

How Lightning Tortuosity Affects the Electromagnetic Fields by Augmenting Their Effective Distance

On the Influence of Channel Tortuosity on Electric Fields Generated by Lightning Return Strokes at Close Distance

The Similarity Between the Derivative of LEMP and Its Approximate Result for Oblique Channel in Near Area

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