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Abstract
O objetivo principal de um sistema elétrico de potência é atender a potência requerida pelo consumidor com valores pré-estabelecidos de tensão e frequência. Para manter esses valores nominais, a utilização de reguladores dinâmicos é fundamental, pois as suas atuações, frente a distúrbios, visam manter a estabilidade dinâmica do sistema. Existem vários modelos dinâmicos para reguladores de tensão e velocidade, e quais modelos devem ser escolhidos de forma que a estabilidade seja mantida na ocorrência de curto circuito, é a preocupação deste artigo. Os resultados apresentados demonstram que existe um tempo máximo de duração dessas correntes em função do modelo dinâmico adotado e caso esse tempo seja extrapolado, instabilidades dinâmicas ocorrem. Em todas as simulações, os limites operacionais serão considerados.
Palavras-chave: Estabilidade dinâmica. Corrente de curto circuito. Modelos dinâmicos.
Abstract
Analysis of the influence of dynamic models in the duration time of short circuit currents.
The main purpose of an electric power system is to supply the power required by the consumer with pre-established voltage and frequency values. In this sense, the use of dynamic regulators is fundamental, since their actions against disturbances is to maintain the dynamic stability of the system where they are inserted. There are several dynamic models for voltage and speed regulators and which models should be chosen in the occurrence of short circuit at its terminals is the concern of this article. The results demonstrated that there is variation in the maximum duration time of these currents in function of the adopted dynamic model. In all simulations, operational limits will be considered.
Keywords: Dynamic stability, Short circuit current, Dynamic models.
References
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