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Type: Artigo de periódico
Title: Comparative Analysis Concerning The Efficacy Of Relays Based On Frequency Measurements For Detection Of Islanding Of Distributed Generators [análise Comparativa Sobre A Eficácia De Relés Baseados Em Medidas De Freqüência Para Detecção De Ilhamento De Geradores Distribuídos]
Author: Vieira Jr. J.C.M.
Freitas W.
Morelato Franca A.L.
Abstract: Frequency-based relays are usually employed in anti-islanding protection of synchronous generators connected to distribution systems. Since the relays performances are strongly dependent on the amount of active power imbalance in the islanded system, a set of detection time versus power imbalance curves is employed to evaluate the performance of these relays. Such curves are obtained by non-linear dynamical simulation. The concept of critical active power imbalance is also presented by using these curves. This methodology is applied to analyze under and over-frequency relays, rate of change of frequency relays (ROCOF relays) and vector surge or vector jump relays (VS relays).
Rights: aberto
Identifier DOI: 
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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