Mitigation of Energy Variability in Renewable/Fuel Cell Hybrid Power Systems

Abstract

The performance of the power-following control to mitigate the energy variability on the DC bus will be analyzed in this chapter under constant and variable load, without and with variable power from the renewable energy sources. The power-following control has been designed to compensate the power flows balance with less energy support from the battery, which will be operated in charge-sustained mode. Thus, the low frequency variation of the power flows on the DC bus will be sustained by the proton exchange membrane fuel cell system based on the power-following control of the air or fuel regulator. The performance of the most efficient energy strategies and best fuel economy strategies proposed in Chap. 5 and 6 for a renewable fuel cell hybrid power systems is analyzed in this chapter. The advantages of using an electrolyzer instead of a dump load to ensure the charge-sustained mode for the battery are also highlighted.