Design and control of converters with innovative structures associated with the fuel cell for green hydrogen vehicle applications

Abstract

PEMFC efficiency is severely limited by faults such as flooding, which leads to system degradation. This thesis proposes a Fault-Tolerant Control (FTC) framework to mitigate flooding and extend fuel cell lifespan. Based on a 91-cell dynamic model, this framework accurately diagnoses voltage and pressure faults. For the power interface, three DC-DC topologies were evaluated: conventional Boost, FIBC, and FSCB. The four-phase FIBC minimizes input current ripple to protect cell health, while the FSCB ensures high voltage gain and natural phase balancing. Python simulations validate that the FTC loop successfully restores system performance within 80 seconds.