Procedimentos de projeto de controladores robustos baseados em otimização por enxame de partículas e desigualdades matriciais lineares para conversores conectados à rede

• Ano de defesa: 2024
• Autor(a) principal: Borin, Lucas Cielo
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica; Centro de Tecnologia
• Palavras-chave em Português: Controle robusto otimizado; Conversor conectado à rede; Desigualdades matriciais lineares; Incertezas paramétricas; Otimização por enxame de partículas; Robust optimized control; Grid-connected converter; Linear matrix inequalities; Parametric uncertainties; Particle swarm optimization; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/31992

This work presents design procedures for robust optimized state feedback current controllers for grid-connected converters with LCL filter operating with uncertain grid inductances. The proposed procedures are based on the use of a particle swarm optimization algorithm, to search for optimal controller parameters, and stability analysis conditions based on linear matrix inequalities, to certify the robust stability of the closedloop system under parametric uncertainties. Real-time simulations based on Controller Hardware-in-the-loop are used to test the controllers for different grid situations, showing that the proposed procedures are capable of synthesizing grid-injected currents complying with the requirements of the IEEE 1547 Standard. Experimental results are presented to confirm the practical viability of controllers in a prototype of a grid-connected converter. Finally, comparative analyzes are presented to position the proposed procedures in relation to state feedback control techniques present in the literature.