Design and control of multiphase interleaved boost converters-based on differential flatness theory for PEM fuel cell multi-stack applications

This article is focused on the development of an energy management algorithm applied to a multi-stack fuel cell (FC) system for DC microgrid applications. To guarantee performance FC stacks, current ripple reduced by employing multiphase interleaved boost converters. A proposed advanced control technique with converters proton exchange membrane (PEM) FCs estimated based differential flatness approach, in which it can track power demand real-time. Furthermore, based-control ensure balance bus voltage when load disturbance occurs. The flatness-based strategy both inner loops (control PEMFC through their converters) and outer loop (DC regulation). Compared classic PI controllers mainly linearization obtain transfer function (making complex its application), theory leans time-domain making easier use various applications while ensuring good performances. validate structure, converter (5 kW) realized validated laboratory. For hydrogen production, methanol has consisted reformer engine that changes water mixed liquid into supply stacks (ME2Power Fuel Cell System: 50 V, 5 kW). tested experimentally using dSPACE controller board platform. Simulation test bench results authenticate excellent during cycles microgrid.