Transient response of grounding electrodes for the frequency-dependence of soil parameters

This study evaluates the response of a horizontal grounding electrode against impulsive currents whose waveforms and time front is typical of lightning. The electrode is found buried in soil with different resistivity values and whose conductivity and permittivity vary with spectrum frequency of lig...

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Bibliographic Details
Published in:	2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA) pp. 839 - 845
Main Authors:	Pedrosa, A G, Shroeder, Marco Aurélio O, Afonso, Márcio M, Alípio, Rafael S, de Castro Assis, Sandro, Oliveira, Tarcísio A S, Braga, Anísio R
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-11-2010
Subjects:	Conductivity Electrodes electromagnetic transients frequency dependence Grounding grounding model Impedance Lightning Permittivity Soil Variation of conductivity and permittivity of soils
Online Access:	Get full text
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Summary:	This study evaluates the response of a horizontal grounding electrode against impulsive currents whose waveforms and time front is typical of lightning. The electrode is found buried in soil with different resistivity values and whose conductivity and permittivity vary with spectrum frequency of lightning according four formulations exists in literature. It was possible to observe the intense propagation effects responsible for the grounding impedance values significantly different from the resistance at low frequency and also difference according to each formulation, which has decreased the potential, the impedance impulsive and impulsive coefficient compared to traditional data from the technical literature specialist.
DOI:	10.1109/TDC-LA.2010.5762982