Utilização de índices de estabilidade transitória para a avaliação de segurança dinâmica

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dc.contributor.authorDe Oliveira, Edni Nunes [UNESP]
dc.contributor.authorPadilha Feltrin, Antonio [UNESP]
dc.contributor.authorMinussi, Carlos R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:20:57Z
dc.date.available2014-05-27T11:20:57Z
dc.date.issued2003-12-01
dc.description.abstractIndices that report how much a contingency is stable or unstable in an electrical power system have been the object of several studies in the last decades. In some approaches, indices are obtained from time-domain simulation; others explore the calculation of the stability margin from the so-called direct methods, or even by neural networks.The goal is always to obtain a fast and reliable way of analysing large disturbance that might occur on the power systems. A fast classification in stable and unstable, as a function of transient stability is crucial for a dynamic security analysis. All good propositions as how to analyse contingencies must present some important features: classification of contingencies; precision and reliability; and efficiency computation. Indices obtained from time-domain simulations have been used to classify the contingencies as stable or unstable. These indices are based on the concepts of coherence, transient energy conversion between kinetic energy and potential energy, and three dot products of state variable. The classification of the contingencies using the indices individually is not reliable, since the performance of these indices varies with each simulated condition. However, collapsing these indices into a single one can improve the analysis significantly. In this paper, it is presented the results of an approach to filter the contingencies, by a simple classification of them into stable, unstable or marginal. This classification is performed from the composite indices obtained from step by step simulation with a time period of the clearing time plus 0.5 second. The contingencies originally classified as stable or unstable do not require this extra simulation. The methodology requires an initial effort to obtain the values of the intervals for classification, and the weights. This is performed once for each power system and can be used in different operating conditions and for different contingencies. No misplaced classification o- - ccurred in any of the tests, i.e., we detected no stable case classified as unstable or otherwise. The methodology is thus well fitted for it allows for a rapid conclusion about the stability of th system, for the majority of the contingencies (Stable or Unstable Cases). The tests, results and discussions are presented using two power systems: (1) the IEEE17 system, composed of 17 generators, 162 buses and 284 transmission lines; and (2) a South Brazilian system configuration, with 10 generators, 45 buses and 71 lines.en
dc.description.affiliationUniversidade Estadual Paulista, Campus de Ilha Solteira, SP
dc.description.affiliationUnespUniversidade Estadual Paulista, Campus de Ilha Solteira, SP
dc.format.extent27-33
dc.identifierhttp://dx.doi.org/10.1109/TLA.2003.1468616
dc.identifier.citationIEEE Latin America Transactions, v. 1, n. 1, p. 27-33, 2003.
dc.identifier.doi10.1109/TLA.2003.1468616
dc.identifier.file2-s2.0-77951731864.pdf
dc.identifier.issn1548-0992
dc.identifier.lattes3886842168147059
dc.identifier.scopus2-s2.0-77951731864
dc.identifier.urihttp://hdl.handle.net/11449/67497
dc.language.isopor
dc.relation.ispartofIEEE Latin America Transactions
dc.relation.ispartofjcr0.502
dc.relation.ispartofsjr0,253
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBrazilian system
dc.subjectComposite index
dc.subjectDirect method
dc.subjectDynamic security analysis
dc.subjectDynamic security assessment
dc.subjectElectrical power system
dc.subjectFast classification
dc.subjectLarge disturbance
dc.subjectOperating condition
dc.subjectPower systems
dc.subjectStability margins
dc.subjectState variables
dc.subjectStep-by-step
dc.subjectTime-domain simulations
dc.subjectTime-periods
dc.subjectTransient energy
dc.subjectTransient stability
dc.subjectTransient stability indices
dc.subjectTransmission line
dc.subjectDynamic analysis
dc.subjectEnergy conversion
dc.subjectMica
dc.subjectSilicate minerals
dc.subjectSystem stability
dc.subjectTime domain analysis
dc.titleUtilização de índices de estabilidade transitória para a avaliação de segurança dinâmicapt
dc.title.alternativeUse of transient stability indices to dynamic security assessmenten
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://www.ieee.org/publications_standards/publications/rights/rights_policies.html
unesp.author.lattes3886842168147059[2]
unesp.author.lattes7166279400544764[3]
unesp.author.orcid0000-0001-6495-440X[2]
unesp.author.orcid0000-0001-6428-4506[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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