Fuel Cell (FC) Hybrid Power System with mitigation of the load power variability by the FC fuel flow control

A new Energy Management Strategy is proposed for Hybrid Power Systems with a Proton Exchange Membrane Fuel Cell system used as backup source. The Energy Management Strategy uses a Load Following control loop of load demand needed on DC bus (pload) and an optimization control loop to improve the fuel economy based on Global Extremum Seeking algorithm. The performance of proposed strategy is compared with that obtained with the Static Feed-Forward strategy using different scenarios for constant or variable load demand, and three case studies considered for the optimization function.