Modeling of lightning incidence to tall structures. I. Theory

Rizk, F.A.M.

doi:10.1109/61.277673

Cited by 136 publications

(83 citation statements)

References 11 publications

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“…The propagation of the upward leader is simulated by considering a unitary velocity ratio and the vector velocity directed towards the tip of the unperturbed downward leader. The upward leader is modeled as a channel with a constant average potential gradient obtained from a semi-empirical expression from laboratory experiments [68]. 21 …”

Section: Towards a Better Physical Understanding Of The Attachment Ofmentioning

confidence: 99%

Attachment of lightning flashes to grounded structures

Becerra¹

2010

Lightning Protection

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Section: Towards a Better Physical Understanding Of The Attachment Ofmentioning

confidence: 99%

Attachment of lightning flashes to grounded structures

Becerra¹

2010

Lightning Protection

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“…In Table IV we report the results obtained by applying our procedure to the experimental distributions of Table III for all the models of Tables I and II describing the lightning exposure of the tower. For these calculations, the experimental data of Berger et al have been assumed to be collected by a tower on a ground plane, assuming that the effect of the presence of the mountain can be disregarded in the expression of the attractive radius of the tower, a point that certainly requires additional investigation [4,44]. The minimum value of current peak has been assumed equal to 2 kA, for all the calculations.…”

Section: Procedures For the Evaluation Of Lightning Current Distrimentioning

confidence: 99%

“…Such a formula, which applies only when the relationship between the attractive radius and the current amplitude is exponential, and only to the current amplitude, has been afterwards applied by Sabot [12] to the Cigré lightning current amplitude distribution. In [44], Rizk has presented the relationship among the probability density functions of peak currents relevant to strokes hitting a mast, of strokes hitting a conductor, and of strokes to open ground. These relationships have been applied in [44] by Rizk to the IEEE lightning current distribution [6], having a median value of 31 kA (and assumed to be inferred only from transmission line 1 The lightning current parameters are also affected by the influence of the reflections at the top and at the basis of the tower (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In [44], Rizk has presented the relationship among the probability density functions of peak currents relevant to strokes hitting a mast, of strokes hitting a conductor, and of strokes to open ground. These relationships have been applied in [44] by Rizk to the IEEE lightning current distribution [6], having a median value of 31 kA (and assumed to be inferred only from transmission line 1 The lightning current parameters are also affected by the influence of the reflections at the top and at the basis of the tower (e.g. [14]).…”

Section: Introductionmentioning

confidence: 99%

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Effect of tall instrumented towers on the statistical distributions of lightning current parameters and its influence on the power system lightning performance assessment

Borghetti¹,

Nucci²,

Paolone³

2003

Int Trans Elec Energy Syst

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Abstract-Statistical distributions of lightning current amplitude, time-to-peak value and other lightning current parameters, used in power system insulation coordination, are based on experimental data obtained by means of tall instrumented towers. It is, however, generally accepted that these distributions are affected by the presence of the tower due to its attractive radius. Current amplitudes, in particular, are biased towards higher values with respect to those that would refer to flashes at ground. In this paper we propose a procedure, based on the Monte Carlo method, that allows to infer the statistical distributions of lightning current parameters at ground level starting from the 'classical' ones, i.e. those obtained from data measured using tall instrumented towers. The procedure is more general than others proposed in the literature for the same purpose, in that it can be applied whatever attractive radius expression is used. The procedure is applied to quantify the tower bias on the classical statistical distribution of lightning current amplitude for a number of available attractive radius expressions. Additionally, the comparison between the indirect-lightning performances of an overhead line, inferred by adopting both the classical, toweraffected, and the unaffected statistical distributions at ground of the lightning current amplitude, is given.

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“…For example, Erickson's model was found to be less suitable to be applied for larger dimensions of lightning inception. In [14], Rizk model's was used to analyze the leader inception criterion for a conventional rod-to-plane gap. However, the model was not clearly defined for buildings and complex structures as the constants were only applicable for rods, tall masts, and transmission line models.…”

Section: Introductionmentioning

confidence: 99%

Determination of the striking distance of a lightning rod using finite element analysis

Bakar¹,

Abidin²,

Illias³

et al. 2016

Turk J Elec Eng & Comp Sci

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Abstract:The problems related to electromagnetic waves transmitted by lightning strikes can be studied through physical lightning models based on laboratory results. The main concern of these models is determining the striking distance between the leader tip and the lightning rod during lightning occurrences. The striking distance is a significant factor in designing the lightning protection system. However, models using finite element analysis (FEA) for this purpose are less likely to be found in the literature. Therefore, in this work, a geometry model of a lightning rod and leader was developed using available FEA software. The model was used to determine the striking distance for different lightning rod heights. The results obtained were compared with those of previous research using different methods to validate the models developed using FEA software. From the comparison, the striking distance obtained from the FEA software as a function of lightning rod height was in good agreement compared to other methods from previous research. The use of FEA software also enables the effect of different tip radii of curvature and shapes of the lightning rod on striking distance to be studied, which can further enhance our understanding of the relationship between striking distance and different rod parameters.

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Modeling of lightning incidence to tall structures. I. Theory

Cited by 136 publications

References 11 publications

Attachment of lightning flashes to grounded structures

Attachment of lightning flashes to grounded structures

Effect of tall instrumented towers on the statistical distributions of lightning current parameters and its influence on the power system lightning performance assessment

Determination of the striking distance of a lightning rod using finite element analysis

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