Complete assessment of impact of lightning strikes on buried cables

Song, Zeqing; Raghuveer, M.R.; He, Jinliang

doi:10.1109/ccece.2002.1015170

Cited by 9 publications

(1 citation statement)

References 1 publication

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“…Over-voltages in elements of electronic and electrical systems and devices can be detected. These over-voltages may damage the equipment, disrupt magnetic memory devices, burn sensitive components and even destroy complete systems [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The induced electric field due to a current transient

Beck¹,

Braunstein²,

Frankental³

2007

J. Phys. A: Math. Theor.

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Calculations and measurements of the electric fields, induced by a lightning strike, are important for understanding the phenomenon and developing effective protection systems. In this paper, a novel approach to the calculation of the electric fields due to lightning strikes, using a relativistic approach, is presented. This approach is based on a known current wave-pair model, representing the lightning current wave. The model presented is one that describes the lightning current wave, either at the first stage of the descending charge wave from the cloud or at the later stage of the return stroke. The electric fields computed are cylindrically symmetric. A simplified method for the calculation of the electric field is achieved by using special relativity theory and relativistic considerations. The proposed approach, described in this paper, is based on simple expressions (by applying Coulomb's law) compared with much more complicated partial differential equations based on Maxwell's equations. A straight forward method of calculating the electric field due to a lightning strike, modelled as a negative–positive (NP) wave-pair, is determined by using the special relativity theory in order to calculate the ‘velocity field’ and relativistic concepts for calculating the ‘acceleration field’. These fields are the basic elements required for calculating the total field resulting from the current wave-pair model. Moreover, a modified simpler method using sub models is represented. The sub-models are filaments of either static charges or charges at constant velocity only. Combining these simple sub-models yields the total wave-pair model. The results fully agree with that obtained by solving Maxwell's equations for the discussed problem.

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Section: Introductionmentioning

confidence: 99%

The induced electric field due to a current transient

Beck¹,

Braunstein²,

Frankental³

2007

J. Phys. A: Math. Theor.

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Model for prediction of characteristics of lightning breakdown channels in soil in the presence of a buried cable

Song

Raghuveer

2003

IEE Proc., Gener. Transm. Distrib.

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Investigation of lightning over-voltages in buried cables based on predicted characteristics of breakdown paths in soils

Song¹,

Raghuveer²,

He³

CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH374

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Assessment of over-voltage in underground power distribution cables, due to lightning strikes impacting the earth's surface and terminating on the cable, is important in the design of suitable protection schemes and mitigating strategies. Existing models do not account adequately the effect of the characteristics of soil breakdown channels intercepted by the cable. In this paper: over-voltage in underground cable is investigated by considering the effect of the characteristics of soil breakdown paths predicted using a suggested model on an electric-$eld-related probabilistic basis. The model provides probabilistic information on the over-voltage in struck cables for different soil characteristics and geometrical configurations.

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Complete assessment of impact of lightning strikes on buried cables

Cited by 9 publications

References 1 publication

The induced electric field due to a current transient

The induced electric field due to a current transient

Model for prediction of characteristics of lightning breakdown channels in soil in the presence of a buried cable

Investigation of lightning over-voltages in buried cables based on predicted characteristics of breakdown paths in soils

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