Conversor CC-CC Full-Bridge isolado com arquitetura de braços em paralelo e modulação PWM intercalada para interface com eletrolisadores na produção de hidrogênio verde (H2V)

Abstract

Green Hydrogen (GH2) has emerged as a promising solution for the energy transition, requiring power converters capable of meeting the stringent electrical requirements of electrolyzers, such as high efficiency and low current ripple. This work proposes and

experimentally validates an isolated Full-Bridge DC-DC converter, structured with parallel arms and interleaved PWM, aiming to improve current sharing among the semiconductors and reduce the output current ripple. The theoretical modeling of the converter is performed through qualitative and quantitative analyses, enabling the development of the system design. The experimental results demonstrated that the converter operates in continuous conduction mode (CCM), exhibiting low current ripple and a balanced distribution, wherein the switches operate with a maximum of one-quarter of the input current. The system is evaluated under various operating conditions, with input voltages ranging from 350 V to 450 V and output voltages between 250 V and 300 V. Furthermore, an efficiency higher than 96% is achieved in the power over a power range from 3 kW to 8 kW. Thus, the proposed topology stands as a viable and high-performance alternative within the evaluated power range, highlighting its strong potential for future integration into green hydrogen production systems.