Assessment of voltage stability critical areas of São Paulo State transmission network / Analise da estabilidade de tensão e areas criticas da rede eletrica do Estado de São Paulo

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This work investigates the security level of the transmission network of the State of São Paulo with respect to the occurrence of voltage collapse. A number of credible scenarios including base cases (N-0) and single contingency (N-1) cases are considered. PV curve methods are employed for evaluating the voltage stability margin for the selected set of operative scenarios. However, these methods do not provide the identification of critical buses or areas from the perspective of voltage stability, which represent the best options for the application of reinforcement/corrective measures against the instability problem. The modal analysis technique is applied for the identification of critical areas with respect to voltage instability, allowing the selection of the areas of the grid that request special attention. The modal analysis method also provide the means of quantifying the impact area of the contingencies captured through the PV curve method, providing a way of separating a set of credible contingencies into three groups as far as their impact: branch-wide contingencies, area-wide contingencies and system-wide contingencies. The results of this research leads to the conclusion that the main transmission network of the State of São Paulo is redundant, since no cases occurred of systemic loss of voltage stability due to single contingencies

ASSUNTO(S)

sistema de energia eletrica - estabilidade modal analysis analise modal sistemas de energia eletrica electric power systems electric power systems stability energia eletrica - transmissão

ACESSO AO ARTIGO

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