Tesis Doctoral
DOI
10.11606/T.18.2017.tde-19052017-154844
Documento
Autor
Nombre completo
Renato Braga de Lima Guedes
Área de Conocimiento
Fecha de Defensa
Publicación
São Carlos, 2004
Director
Tribunal
Bretas, Newton Geraldo (Presidente)
Castro Junior, Carlos Alberto de
Costa, Vivaldo Fernando da
Silva, Luiz Carlos Pereira da
Souza, Antônio Carlos Zambroni de
Título en portugués
Cálculo das soluções de baixa tensão das equações de fluxo de carga através de sistemas dinâmicos auxiliares e função energia estendida com modelo ZIP para análise de colapso de tensão
Palabras clave en portugués
Fluxo de carga
Função energia
Métodos diretos
Soluções de baixa tensão
Resumen en portugués
Título en inglés
not available
Palabras clave en inglés
Direct methods
Energy function
Low voltage solutions
Voltage stability
Resumen en inglés
This work may be divided into two distinct parts. Both of them are new contributions to stability analysis of power systems. In the first part it is proposed a new method to calculate the critical load flow low voltage solutions, and it is the main part of this work. Meanwhile, the last two chapters of this work presents a proposed extended energy function that consider the common load ZIP models. It allows the analysis of angle and voltage stability for power systems subjected to large disturbances. This work proposes a method to calculate the low voltage solutions (LVS) of the load flow equations of an electrical power system. The proposed method identifies the LVS involved in the saddle-node bifurcation leading the power system to a voltage collapse. This solution is known as the critical low voltage solution. In order to perform the proposed calculation, an auxiliary dynamical gradient system is used. It is shown that the equilibrium points of that associated auxiliary dynamical gradient system are the solutions of the load flow equations. In such manner, the paper proposes identifying the critical LVS calculating the equilibrium points of an auxiliary dynamical gradient system. The proposed method was tested on the Stagg 5-bus, on the IEEE 39-bus and on IEEE 118-bus test systems, and the results are presented at the end of the text.

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Fecha de Publicación
2017-05-19