A load transient mitigation scheme is proposed in this paper for stand-alone solid oxide fuel cell (SOFC)-battery power systems. The scheme is based on low-pass filtering of load transients and fuel cell current control. The fuel cell is controlled in such a way to provide the steady-state load, while the battery will supply the transient load. The technique can be used to improve the output power quality of the overall system as well as the SOFC durability by mitigating the stresses on SOFC caused by the load transients. Simulation studies have been carried out to verify the proposed technique. Simulation results show the effectiveness of the proposed technique, which prevents the load transient to affect the fuel cell performance.

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