Um controlador adaptativo robusto aplicado a conversores estáticos conectados à rede elétrica através de filtro LCL

• Autor(a) principal: Tambara, Rodrigo Varella
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Manancial - Repositório Digital da UFSM
• dARK ID: ark:/26339/0013000001fzn
• Texto Completo: http://repositorio.ufsm.br/handle/1/3686
• topic: Controle adaptativo robusto; Método dos mínimos quadrados recursivos; Conversores estáticos; Filtro LCL; Robust adaptive control; Recursive least square; Static converters; LCL filter; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA

This Thesis deals with the development of a novel robust model reference adaptive controller (RMRAC), in discrete-time applied to grid-connected systems using LCL filter. This controller uses a modified robust parameters identifier based on a recursive least-squares algorithm. Two control structures are analyzed: state feedback approach and input-output approach. The robust stability analysis of the controller is presented including unmodeled dynamics. Thus, through these analyses, constraints design, in discrete-time, are obtained. For the validation of the proposed control algorithm, simulation and experimental results of a grid-connected power converter with LCL-filter, with current control, are presented.