Compensação da forma de onda de um inversor PWM utilizando uma técnica de controle repetitivo

• Ano de defesa: 2011
• Autor(a) principal: Vinícius Cordeiro Durães Araujo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Engenharia Elétrica; Engenharia elétrica
• Link de acesso: http://hdl.handle.net/1843/BUOS-98KJJ7

Inverters for UPS systems must provide a regulated output voltage and low value of total harmonic distortion - THD. This paper presents a study of several control techniques for the output stage of a UPS system. We performed a literature review of control strategies that address this goal. The use of a digital control technique to regulate the RMS value of the waveform associated with repetitive integral action is evaluated for low cost PWM inverters. As a result of repetitive integral action, this strategy of digital control reduces the steady-state error and distortions caused by periodic disturbances such as nonlinear loads. In addition, the digital control technique measures only the output voltage, reducing the cost with sensors.