Model based-control of three-level boost converter for fuel cell applications

This paper presents a high-gain boost converter for an fuel cell (FC) applications. A model-based control structure based-on flatness principle for a distributed DC generation is studied. As the derived dynamic model of the converter model is nonlinear, advanced control techniques using differential flatness are applied. Utilizing the flatness property, we propose simple solutions to the system performance and stabilization problems. Design controller parameters are straightforward and autonomous of the operating point. To validate the proposed method, a prototype FC power converter (1.2-kW three-level boost converter) is realized in the laboratory. The proposed control law is implemented by digital estimation in a dSPACE 1104 controller card. Experimental results with a polymer electrolyte membrane FC of 1200 W and 46 A in the laboratory substantiate the good control scheme.