Projeto de controladores ressonantes para sistemas ininterruptos de energia para seguimento assintótico de sinais de referência senoidais e rejeição de harmônicos

• Ano de defesa: 2010
• Autor(a) principal: Mano, Otávio Simões
• Orientador(a): Coutinho, Daniel Ferreira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: ENGENHARIA ELÉTRICA; ENERGIA ELÉTRICA - CONTROLE; SISTEMAS DE CONTROLE; CIRCUITOS ELÉTRICOS
• Link de acesso: http://hdl.handle.net/10923/3144

This master’s thesis presents a robust control strategy for tracking sinusoidal reference signals with a zero error and the rejection of harmonic components in steady state for a 5kVA single phase uninterruptible power supply (UPS). To this end, multiple resonant compensators are applied to control the UPS subject to nonlinear loads, where the controllers are tuned in the fundamental frequency and in the most important harmonic components of the load current. The control parameters design is formulated in terms of linear matrix inequalities (LMI) considering load variations and disturbances. The proposed design conditions ensure the robust stability of the control system and incorporate performance specifications to obtain a good tradeoff between the transient response (D-stability) and disturbance attenuation (H∞). To evaluate the performance of the proposed control strategy, several practical experiments are carried out considering linear and nonlinear loads in accordance to the IEC-62040-3 standard, where the control system has obtained a nice performance in terms of transient response and harmonic rejection.