European Journal of Scientific Research - EuroJournals

A Predictive Current Control Technique on Fuel Cell Based Distributed
Generation in a Standalone AC Power Supply 900
Figure 8: Simulation results under fuel cell's failure, load increasing and no backup existence.
As shown in Fig. 9, fuel cell's voltage is dropped at 0.2 second and then recovered at 1 second.
To take into consideration of battery as a backup of this system, leads to a regulated DC link voltage
during fuel cell's failure. Therefore, the output current and voltage have no transient and variation.
Figure 9: Simulation results under a fuel cell's fail with backup existence
5.4. Fuel Cell's Output Voltage Not Changes, Load Increases and Backup Battery Exists
As shown in Fig. 10, when load increases (at 0.45 second), backup battery compensates the shortage of
fuel cell's output voltage. Fuel cell and backup battery feed the load together.