Faculdade de Engenharia Civil - FEC/ITEC
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2788
Navegar
Navegando Faculdade de Engenharia Civil - FEC/ITEC por Autor "BARRA JUNIOR, Walter"
Agora exibindo 1 - 2 de 2
- Resultados por página
- Opções de Ordenação
Item Acesso aberto (Open Access) Controle Fuzzy aplicado à melhoria da estabilidade dinâmica em sistemas elétricos de potência(2005-06) BARRA JUNIOR, Walter; BARREIROS, José Augusto Lima; COSTA JÚNIOR, Carlos Tavares da; FERREIRA, André Maurício DamascenoThis work presents a fuzzy control strategy which can be applied to improve the dynamic stability of electric power systems. The gains of fuzzy controller are smoothly adjusted by using interpolation among the gains of a set of previously designed local controllers, according to the current plant operating condition. In this way, the parameters of the fuzzy controller are automatically adjusted on-line, in order to cope with changes in the power system operating conditions. The performance of the fuzzy strategy was assessed by simulation studies, using a nonlinear machine infinite bus bar dynamic model. The results show that it is possible to improve the power system dynamic performance under time-variable operating conditions.in english. Please notice that the abstract in english comes first.Item Acesso aberto (Open Access) Técnica de controle preditivo baseado em modelo aplicada ao controle de tensão de um gerador síncrono - resultados experimentais(2012-10) MOUTINHO, Marcelo Nascimento; BARRA JUNIOR, Walter; COSTA JÚNIOR, Carlos Tavares da; BARREIROS, José Augusto LimaThis paper presents the results of the experimental evaluation of a digital self-tuning predictive control methodology applied to the voltage control of a small-scale energy generation system. A recursive estimator based on the well known least-squares method is used in the identification stage of the proposed controller. The stage for calculation of the signal control method is performed with the Generalized Predictive Controller (GPC) algorithm. The experimental evaluation was performed using step perturbations applied in different operating conditions of the studied power system. For comparison purposes, the results of the evaluation of a self-tuning controller using the pole-placement method for the control signal formulation and three digital controllers with fixed parameters also will be presented.