Abstract
In this paper, a fuel cell power system is considered to supply DC power for a Peltier based cooling process. For the fuel cell, there exist slow dynamic response and soft characteristic due to long-running. Therefore, the fuel cell hybrid power system is designed, including fuel cell, battery, unidirectional DC-DC converter and bidirectional DC-DC converter. In order to reduce the slow dynamic response and soft characteristic, it is the most important that the bidirectional DC-DC converter is controlled for charging or discharging to the battery. A control scheme combined feedforward and feedback is proposed for the bidirectional DC-DC converter, where feedforward control is based on the output voltage of the fuel cell. Simulation results based on the designed circuit and proposed method are given to verify the performance of the converter.
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