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Doctoral Thesis
DOI
10.11606/T.18.2013.tde-09052013-151230
Document
Author
Full name
Edson Aparecido Rozas Theodoro
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2013
Supervisor
Committee
Alberto, Luís Fernando Costa (President)
Bretas, Newton Geraldo
Martins, André Christóvão Pio
Silva, Aguinaldo Silveira e
Silva, Luiz Carlos Pereira da
Title in Portuguese
Contribuição à análise de estabilidade transitória, em duas escalas de tempo, de sistemas elétricos de potência via métodos diretos
Keywords in Portuguese
Estabilidade transitória
Método BCU
Método CUEP
Métodos diretos
Sistemas com duas escalas de tempo
Sistemas elétricos de potência
Sistemas singularmente perturbados
Abstract in Portuguese
O presente trabalho tem como objetivo investigar a presença de diferentes escalas de tempo nos modelos matemáticos que descrevem a dinâmica dos sistemas elétricos de potência (SEPs), em particular a existência de duas escalas de tempo distintas: lenta e rápida, e explorá-las no estudo de estabilidade transitória destes sistemas através da utilização de métodos diretos (funções energia). Em particular, o método do Ponto de Equilíbrio Instável de Controle (CUEP) para modelos com duas escalas de tempo será estudado e aplicado na análise de estabilidade transitória de SEPs. As bases teóricas para a análise de estabilidade transitória, de sistemas com duas escalas de tempo, serão apresentadas, assim como funções energia e novos algoritmos numéricos para o cálculo do CUEP nestes sistemas, a fim de evidenciar as melhorias e possíveis limitações deste novo método CUEP em duas escalas de tempo quando comparado ao método CUEP tradicional. Explorando as escalas de tempo lenta e rápida na análise de estabilidade transitória, espera-se que novos algoritmos numéricos mais robustos para o cálculo do CUEP sejam obtidos, assim como a diminuição do conservadorismo dos resultados.
Title in English
Contribution to two-time scale transient stability assessment of power systems by direct methods
Keywords in English
BCU method
CUEP method
Direct methods
Electric power systems
Singular perturbed systems
Transient stability
Two-time scale systems
Abstract in English
The main objective of this work is to investigate the existence of several time-scales in the mathematical models of electric power systems, in particular the existence of two-time scales: slow and fast, and exploit these features in the direct transient stability assessment. In particular, the Controlling Unstable Equilibrium Point (CUEP) method is studied for two-time scale models of power systems and applied to transient stability analysis. In order to accomplish this aim, a sound theoretical basis for two-time scale transient stability analysis of electric power system models will be provided, as well as energy functions and new numerical algorithms for proper two-time scale CUEP calculations, with the purpose of investigating improvements and possible limitations of this method when compared with the traditional CUEP method. Exploiting the two-time scale features of power system models, it is intended to obtain new robust numerical algorithms for transient stability analysis, as well as to diminish the conservativeness of the results.
 
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Edson.pdf (2.40 Mbytes)
Publishing Date
2013-05-16
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • Theodoro, Edson A. R., ALBERTO, LUIS F. C., e Chiang, Hsiao-Dong. Towards the development of a two-time scale CUEP/BCU method [doi:10.1109/NAPS.2013.6666888]. In 2013 North American Power Symposium (NAPS), Manhattan, 2013. 2013 North American Power Symposium (NAPS). : IEEE, 2013.
All rights of the thesis/dissertation are from the authors
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