Design and simulation of current-fed dual-active full-bridge DC/DC converter control system applied to proton exchange membrane fuel cell

Proton exchange membrane fuel cells (PEMFC) have been increasingly applied in clean and efficient distributed power generation systems recent years. However, the output characteristics of PEMFC are relatively soft due to influence multiple polarization overvoltage. With increasement current density, voltage shows be a nonlinear downward trend. In addition, order ensure lifetime PEMFC, ripple is often concerned. Considering above characteristics, achieve transmission system, this paper adopts current-fed dual-active full-bridge (DAB) DC/DC converter topology, which can switching most switches. Furthermore, it restrain ripple. Hence, efficiency requirements fulfilled. Finally DAB designed simulated through PSIM. The C-block simulate supply according actual parameters. constant novel closed-loop control strategy proposed.