This paper proposes a novel nonlinear controller of the air-feed system for a polymer electrolyte membrane (PEM) fuel cell with an auxiliary power battery. To improve the fast response of the air-feed system, we designed a PEM fuel cell hybrid system, wherein the PEM fuel cell supplies the primary power for the load demand, and the buffered power battery satisfies the additional power requirement. A power coordination strategy is presented to distribute dynamically varying load power demand to the PEM fuel cell and battery. A reduced third-order nonlinear model is used to analyze the nonlinear characteristics of the air-feed system. Next, to improve the tracking performance of the oxygen excess ratio, a triple-step nonlinear controller is designed through the affinelike air-feed system model, and the stability of closed-loop system is guaranteed by the Lyapunov-based technique. Subsequently, the effectiveness of the power coordination strategy and controller is validated by some simulation comparisons. The simulation results indicate that the proposed approach performs better than the proportional-integral-derivative (PID) controller and the triple-step controller for a PEM fuel cell system without an auxiliary battery.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.