PEM fuel cell as energy source using fuzzy logic controller

A dynamic model of a proton exchange membrane (PEM) fuel cell (FC) has been developed to study its dynamic behaviors along with a fuzzy logic controller (FLC) to control the fuel flow to the reformer. The model can be used to study the dynamic behavior of the system in stand-alone and grid connected mode. The dynamic behavior of the fuel cell system with FLC and PI controller were studied and compared. The dynamic behavior of the system with FLC is found to be more improved as compared to that of the PI controller in terms of response time of the FC system in following the load demand to it. The use of FLC reduces the capacity of storage devices in stand-alone mode to meet the load requirement during transient periods. To meet the power demand set by the user and maintain inverter AC voltage at the desired value PI controllers were used.