Conversor Forward duas chaves com circuito de desmagnetização reconfigurável para aplicações em processamento parcial de potência em sistemas fotovoltaicos

• Ano de defesa: 2025
• Autor(a) principal: Alficha, Mano Pascoal
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; UFSM; Programa de Pós-Graduação em Engenharia Elétrica; Centro de Tecnologia
• Palavras-chave em Português: Conversor Forward de 2 chaves; Conversores CC–CC bidirecionais; Processamento parcial de potência; Sistemas fotovoltaicos; Two-switch Forward converter; Bidirectional DC–DC converters; Partial power processing; Photovoltaic systems; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/36721

This work presents the study and validation of a modified topology of the two-switch Forward converter, applied to partial power processing in series-connected photovoltaic (PV) systems. The proposed approach is based on the introduction of two controlled switching relays operating in a complementary manner during the switching cycle, increasing the transformer demagnetization voltage. This modification enables operation with a duty cycle greater than 0.5, allowing a lower turns ratio design, which reduces conduction losses in both semiconductors and transformer windings. The adopted methodology includes modeling the PV system considering variations in irradiance and temperature, designing the modified converter, and integrating it into the PV array. The analysis was carried out through simulations using the PSIM© software. The results demonstrate that the proposed topology leads to a reduction in root mean square (RMS) currents in key components, improved energy efficiency, and higher power density, while maintaining operational stability under various environmental conditions. Therefore, the modified Forward converter proves to be a feasible and efficient solution for modular photovoltaic architectures employing PPP.