Abstract
A real-time optimization (RTO) strategy for Fuel Cell Hybrid Power Sources (FCHPS) based on the control of the boost converter is proposed in this study. The reference current for boost controller is generated by the optimization strategy based on the Global Extremum Seeking (GES) scheme. The GES scheme will track the maximum value of the optimization function considered for the FC system. The second input of the boost controller is the FC current. Because the fuel flow rate is controlled by the FC current, the optimization loop is closed via the fuel flow rate. The Load-Following (LF) control is used for the air flow rate to adjust the FC power to variable load demand. The performance of the proposed Boost_GES-RTO strategy is shown in comparison with the sFF-RTO strategy for constant and variable load based on the following performance indicators: the FC net power (P FCnet ), the fuel consumption efficiency (Fuel eff ), the FC system efficiency (η sys ), and Total Fuel consumption (Fuel T ).
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