Contents I. Introduction
A Lightning may generate currents up to 200 kA and frequencies from 100 kHz to 10 MHz. At these frequencies, the elements of a grounding system present characteristics mainly inductive.
Abstract:
High currents leaked to earth, leads to an electric field, which can be capable of breaking down the dielectric strength of the soil. When this happens, the ionization ph...Show MoreMetadata
Abstract:
High currents leaked to earth, leads to an electric field, which can be capable of breaking down the dielectric strength of the soil. When this happens, the ionization phenomena takes place, which reduce the grounding system impedance and modify its performance. In this paper, a computational model for transient performance of grounding systems is presented. The model is capable of simulating soil ionization and is based in a transmission line approach. The grounding system transient analysis is carried out in the frequency domain. The computer model developed was used to study the performance of vertical rods and grounding grids of different sizes. In every case, different electric field magnitudes and soil resistivity were used, currents of different frequency components and magnitude values where used as well. The obtained results presented here, were compared and validated with other computer model results and measurements published in the literature.
Published in: 2010 IEEE Industry Applications Society Annual Meeting
Date of Conference: 03-07 October 2010
Date Added to IEEE Xplore: 01 November 2010
ISBN Information:
ISSN Information:
References is not available for this document.
Select All
1.
José Cidrás, Antonio F. Otero and Carlos Garrido, "Nodal Frequency Analysis of Grounding Systems Considering the Soil Ionization Effect", IEEE Transactions on Power Delivery, vol. 15, no. 1, pp. 103-107, January 2000.
2.
Bo Zhang, Jinliang He and Jae-Bok Lee, "Numerical Analysis of Transient Performance of Grounding Systems Considering Soil Ionization by Coupling Moment Method whit Circuit Teory", IEEE Transactions on Magnetics, vol. 41, no. 05, pp. 1440-1443, May 2005.
3.
Shozo Sekioka and Maria I. Lorentzou, "Current Dependent Grounding Resistance Model Based on Energy Balance of Soil Ionization", IEEE Transactions on Power Delivery, vol. 21, no. 1, pp. 194-201, January 2006.
4.
A. Geri, G. M. Veca, E. Garbagnati and G. Sartorio, "Non-Linear Behavior of Ground Electrodes Under Lightning Surge Currents: Computer Modeling and Comparison with Experimental Results", IEEE Transactions on Magnetics, vol. 28, no. 2, pp. 1442-1445, March 1992.
5.
Anton Habjanic and Mladen Trlep, "The Simulation of the Soil Ionization Phenomenon Around the Grounding System by the Finite Element Method", IEEE Transactions on Magnetics, vol. 42, no. 4, pp. 867-870, April 2006.
6.
A. C. Liew and M. Darveniza, "Dynamic Model of Impulse Characteristics of Concentrated Earths", IEE Proceedings, vol. 121, no. 2, pp. 123-135, February 1974.
7.
A. P. Meliopoulos and M. G. Moharam, "Transient Analysis of Grounding Systems", IEEE Transactions on Power Apparatus and Systems, vol. PAS-102, no. 2, pp. 389-399, February 1983.
8.
E.E. Oettlé, "A New General Estimation Curve for Predicting the Impulse Impedance of Concentrated Earth Electrodes", IEEE Transactions on Power Delivery, vol. 3, no. 4, pp. 2020-2029, October 1988.
9.
J. Luis Naredo, V., V. Pablo Moreno, Z. Leonardo Guardado and J. Alberto Gutiérrez, "La Transformada Numérica de Laplace como una Herramienta de Investigación y Desarrollo en Ingeniería Eléctrica", Segundo Congreso Nacional de Ingeniería Eléctrica y Electrónica CONATEC 99, Noviembre 1999.
10.
A. P. S. Meliopoulos, Power System Grounding and Transients: an Introduction, U.S.A.:Marcel Dekker, 1988.
11.
Jacinto Torres Jiménez, Análisis Transitorio de Redes de Tierra en el Dominio de la Frecuencia, Morelia, Mich., México:Instituto Tecnológico de Morelia, Octubre 2004.
12.
J. Leonardo Guardado Zavala, "Respuesta Estática y Dinámica de la Línea de Transmisión" in Monografia para Obtener el Título de Ingeniero Electricista, Morelia, Mich., México:universidad Michoacana de San Nicolás de Hidalgo, 1984.
