Abstract
The power generated in a proton exchange membrane fuel cell based system depends on the hydrogen and oxygen flows, the regulation of pressure and management of water and heat .One of the important operating variable is the reactant utilization which is directly proportional to fuel cell stack current. When a load is connected to the fuel cell system, the control system must control the flow rate of hydrogen in order to avoid degradation of fuel cell (FC) voltage. Therefore, the objective of the paper is to regulate the input fuel flow to achieve the desired output power. Various control strategies proposed in the literature do not consider the dynamic model of fuel cell system and fuel flow controller. This paper presents the development of fuzzy logic controller for fuel cell based Hybrid Cascaded MultiLevel Inverter(MLI). A MATLAB/SIMULINK control structure for the overall FC based system has been presented which includes the local fuzzy controllers for Interleaved Boost Converter (IBC), HCMLI and the fuel cell. The performance has been compared with PI controller.
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