Email this article The profile of the electric field on the earth discontinuity with a lightning conductor
Abstract
In this paper, we present some results of investigations carried out in the electric field distribution of both horizontal and vertical lightning conductors in the case of discontinuous earth. The conductors may be situated as well as in the upper or the lower earth part. The electric field distribution was determined in the case of lightning conductor situated between the high voltage rod and the discontinuity (interface) and also in the case of high voltage rod situated between the lightning conductor and the discontinuity. In some situations the electric field distribution on the plan are smaller than defined by the electro-geometrical model. We attribute this result to the great field intensity at the discontinuity, which reduce the lightning conductor discharge capture effect. This is in concordance with the results concerning the electrical strength of such air gaps without lightning conductors.
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R. H. Golde ; « Lightning : T2 », Academic Press, 2ème édition, London,(1981).
G. Le Roy, C. Gary, B. Hutzler, J. Lacot, C. Dubaton : « Les propriétés diélectriques de l’air et les très hautes tensions», Ed Eyrolles, Paris, 1984, pp : 92-251.
T. HORVATH : « Computation of Ligthning Protection», Research Studies Press LTD, England 1991.
Beroual A, Rakotonandrasana J, Fofana I. Predictive dynamic model of the negative lightning discharge based on similarity with long laboratory sparks. IEEE Transactions on Dielectrics and Electrical Insulation. October 2010, Vol. 17, 5, pp. 1551 – 1561.
A. Boubakeur, S. A. A. Boumaza, R. Belaicha, R. Boudissa : « Influence of earth heterogeneity on negative lightning breakdown of rod-plane air-gaps », 24th ICLP, Birmingham, 1998, pp : 473-477.
A. Boubakeur, J. Ferras : « Négative lightning breakdown of rod-plane air gaps with heterogeneous earth », 5ème ISH, paper 14-26, Braunschweig ,RFA, 1987.
A . Rahmani, A. Boubakeur, H. Brouri; “ Model of an horizontal lightning conductor protection in the case of earth discontinuity” International Symposium on Electromagnetic Compatibility EMC EUROPE 2002, (Sorrento) Italy 2002, pp 267-270.
S. Cristina, G. Denelli, M. Feliziani, Numerical computation of corona space charge and V-I characteristic in DC electrostatic precipitators, IEEE Trans. Ind. Appl., 27, 147-153 (1991).
Pei-bai Zhou, Numerical Analysis of Electromagnetic Fields, Springer-Verlag, Berlin, 1993.
A. Kara, E. Onal, O. Kalenderli, K. Mardikyan, “The Effect of Insulating Barriers on AC Breakdown Voltage in Inhomogeneous Field”, IEEE MELECON 2006 Mediterranean Electrotechnical Conference, Benalmádena (Málaga), Spain, pp. 1206-1208, 16-19 May 2006.
A.Rahmani, A. Khechekhouche, A. Mekhaldi, A.Boubakeur “ Electrical Strength of Rod-Discontinuous Plane Air Gap Under Lightning Impulse Applied Voltage Using a Distributed Capacity Probe ” IEEE-CEIDP, October 14-17, 2012, Montréal CANADA, pp 379-382.
K. Yamazawa and H. Yamashita, “Calculation of the Electric Field Distribution under the Point-plane Gap Configurations using the FEM”, 1997 IEEE Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, Minneapolis, pp. 648-651, 19-22 October 1997.
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