Hamiltonian Energy Control With Energy Management Strategy for Fuel Cell Hybrid Power System

This article introduces an adaptive Hamiltonian energy control strategy for the proposed Fuel Cell (FC) hybrid power electronics architecture. The proposed controller with added integrator action is based on the Hamiltonian-Lyapunov function. In contrast to previous work, the proposed control method aims to control the output current of the Proton Exchange Membrane Fuel Cells (PEMFCs), while the DC bus voltage is controlled by the supercapacitor. Moreover, integrators are built into the control structure to eliminate steady-state errors in current and voltage, respectively. The Lyapunov candidate function is chosen to demonstrate the large-signal stability of the whole system. A nonlinear control strategy based on the flatness control theory is adopted for the energy management strategy of the hybrid system composed of fuel cell and supercapacitor. The experimental results demonstrate the effectiveness and feasibility of the proposed control method.