Computer Analysis of Electromagnetic Transients in Grounding Systems Considering Variation of Soil Parameters with Frequency

Autor:	Tarcísio Antônio Santos de Oliveira, Sandro de Castro Assis, Marco Aurélio O. Schroeder, Marcio Matias Afonso
Rok vydání:	2012
Předmět:	Electromagnetic wave equation Frequency response business.industry Ground Electrical engineering Mechanics Physics::Classical Physics Moment (mathematics) Frequency domain Computational electromagnetics Transient response business Reduction (mathematics) Mathematics
Zdroj:	Journal of Electromagnetic Analysis and Applications. :475-480
ISSN:	1942-0749 1942-0730
DOI:	10.4236/jemaa.2012.412066
Popis:	This paper presents a mathematical model to calculate transients in grounding systems. The derived equations arise from direct application of basic electromagnetic equations in frequency domain, whose solution is obtained by the application of the Moment Methods. A formulation based on experimental measurements is applied to quantify the soil parameters for each frequency. The unified approach is applied in the calculation of the grounding impedance of horizontal electrodes. Results show that the inclusion of frequency dependence of the soil parameters leads to a reduction of the values of grounding impedance, in comparison with results for soils with parameters independent of frequency.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7fc6f80b184c8fae44158e621e00ca21 https://doi.org/10.4236/jemaa.2012.412066 Zobrazit plný text záznamu