Different approaches to grounding resistance. Calculation for thin wire structures at low frequency energization

Faleiro Usanos, Eduardo and Asensio Madrid, Gabriel and Denche Castejon, Gregorio and Garcia Puertas, Daniel and Moreno Mohino, Jorge (2014). Different approaches to grounding resistance. Calculation for thin wire structures at low frequency energization. "IJECS. International Journal of Electrical & Computer Sciences", v. 14 (n. 4); pp. 25-32. ISSN 2077-1231.

Description

Title: Different approaches to grounding resistance. Calculation for thin wire structures at low frequency energization
Author/s:
  • Faleiro Usanos, Eduardo
  • Asensio Madrid, Gabriel
  • Denche Castejon, Gregorio
  • Garcia Puertas, Daniel
  • Moreno Mohino, Jorge
Item Type: Article
Título de Revista/Publicación: IJECS. International Journal of Electrical & Computer Sciences
Date: August 2014
Volume: 14
Subjects:
Freetext Keywords: Low frequency current energization; Electromagnetic analysis; Grounding grids; Grounding resistance; Method of moments.
Faculty: E.T.S.I. Diseño Industrial (UPM)
Department: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The present paper deals with the calculation of grounding resistance of an electrode composed of thin wires, that we consider here as perfect electric conductors (PEC) e.g. with null internal resistance, when buried in a soil of uniform resistivity. The potential profile at the ground surface is also calculated when the electrode is energized with low frequency current. The classic treatment by using leakage currents, called Charge Simulated Method (CSM), is compared with that using a set of steady currents along the axis of the wires, here called the Longitudinal Currents Method (LCM), to solve the Maxwell equations. The method of moments is applied to obtain a numerical approximation of the solution by using rectangular basis functions. Both methods are applied to two types of electrodes and the results are also compared with those obtained using a thirth approach, the Average Potential Method (APM), later described in the text. From the analysis performed, we can estimate a value of the error in the determination of grounding resistance as a function of the number of segments in which the electrodes are divided.

More information

Item ID: 35820
DC Identifier: http://oa.upm.es/35820/
OAI Identifier: oai:oa.upm.es:35820
Official URL: http://www.ijens.org/Vol_14_I_04/144604-5858-IJECS-IJENS.pdf
Deposited by: Memoria Investigacion
Deposited on: 18 Jun 2015 08:29
Last Modified: 18 Jun 2015 08:32
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