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Type: Artigo de periódico
Title: Proposal of an alternative transmission line model for symmetrical and asymmetrical configurations
Author: da Costa, ECM
Kurokawa, S
do Prado, AJ
Pissolato, J
Abstract: This article shows a transmission line model for simulation of fast and slow transients, applied to symmetrical or asymmetrical configurations. A transmission line model is developed based on lumped elements representation and state-space techniques. The proposed methodology represents a practical procedure to model three-phase transmission lines directly in time domain, without the explicit or implicit use of inverse transforms. In three-phase representation, analysis modal techniques are applied to decouple the phases in their respective propagation modes, using a correction procedure to set a real and constant matrix for untransposed lines with or without vertical symmetry plane. The proposed methodology takes into account the frequency-dependent parameters of the line and in order to include this effect in the state matrices, a fitting procedure is applied. To verify the accuracy of the proposed state-space model in frequency domain, a simple methodology is described based on line distributed parameters and transfer function associated with input/output signals of the lumped parameters representation. In addition, this article proposes the use of a fast and robust integration procedure to solve the state equations, enabling transient and steady-state simulations. The results obtained by the proposed methodology are compared with several established transmission line models in EMTP, taking into account an asymmetrical three-phase transmission line. The principal contribution of the proposed methodology is to handle a steady fundamental signal mixed with fast and slow transients, including impulsive and oscillatory behavior, by a practical procedure applied directly in time domain for symmetrical or asymmetrical representations. (C) 2011 Elsevier Ltd. All rights reserved.
Subject: Electromagnetic transients
Transmission line parameters
Lumped parameters
Country: Inglaterra
Editor: Elsevier Sci Ltd
Citation: International Journal Of Electrical Power & Energy Systems. Elsevier Sci Ltd, v. 33, n. 8, n. 1375, n. 1383, 2011.
Rights: fechado
Identifier DOI: 10.1016/j.ijepes.2011.06.015
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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