Metodologia para estudos de estabilidade eletromecânica para conexão de centrais geradoras segundo critérios nacionais

Abstract

When dealing with Power Systems, one major feature that needs to be analyzed with keenness is its transient stability, which means the ability of the system to maintain its voltage and frequency in a equilibrium state after any disturbance. Although some specific criteria can change from one power system to another, the main goal is that all of them should have full capacity to return to a steady-state operation regardless any event that might occur. In a general way, the analysis of a power system stability is done through softwares, because of the high complexity in the calculation and in the current power systems. With that said, there is some criteria which the institutions responsible for the regulation of the Brazilian electrical system, in particular, the Agência Nacional de Energia Elétrica (ANEEL) and the Operador Nacional do Sistema Elétrico (ONS), uses to define if the systems that are under their responsibility are stable or not. These studies are essential to the connection of any high-voltage equipment on Brazilian soil. This paper proposes a methodology of study that determines if the connection of a determined power plant is stable or not with the criteria determined by the agents who regulate the national electrical sector.