New Smart Control based on MPPT/MEPT Algorithm for Hybrid Fuel Cell Power System

In this paper, a new algorithm for enhanced management of a hybrid fuel-cell system is proposed. The purpose of this algorithm, which has been called Maximum Efficiency Point Tracking algorithm (MEPT-algorithm), is to polarize the fuel cell in an optimum point maximizing its efficiency and minimizing the fuel consumption. The goal is to guarantee fast power transients in the load while the fuel cell is kept in the optimum point by the hybridization of a fuel cell with an energy storage system (ESS) based on ultracapacitors. The hybrid power system model has been simulated in Matlab/Simulink applying the proposed algorithm and the classical Maximum Power Point Tracking (MPPT) algorithm. The combined control in DC/DC converters allows us to modify the Fuel Cell’s operating point, as well as its MPPT or MEPT algorithm. A detailed analysis of the results verifies the benefits of the use of MEPT vs only the MPPT. Typical figures of merit and conclusions are also presented in this paper.