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European Journal of Scientific Research - EuroJournals

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A Predictive Current Control Technique on Fuel Cell Based Distributed<br />

Generation in a Standalone AC Power Supply 902<br />

Figure 12: Duty cycle <strong>of</strong> fuel cell and backup battery's converters<br />

6. Conclusions<br />

In this research it has been presented a new predictive current control based method to convert the<br />

generated dc output voltage <strong>of</strong> fuel cell into a higher regulated dc voltage. The suggested algorithm<br />

calculates the required current <strong>of</strong> load and capacitor to regulate and control DC output at a desired<br />

voltage level on the basis <strong>of</strong> adopted system (Fuel cell in parallel with backup battery and interfaced<br />

converters). Investigated studies illustrate that the worst state <strong>of</strong> fuel cell based distributed generation<br />

systems in a standalone AC power supply is increment <strong>of</strong> load during fuel cell's output voltage failures.<br />

The main objective <strong>of</strong> this research is improved FC based system in critical conditions. Clearly, backup<br />

battery has two tasks:<br />

1. DC link capacitor's voltage regulation in desired level.<br />

2. Transient states <strong>of</strong> system variation reduction.<br />

According to the simulation results, the output parameters have the desired value and minimum<br />

transient state together. In conclusion, the suggested predictive current control based method is capable<br />

to achieve mentioned goals with good performance <strong>of</strong> system's interfaced converters. Simulation<br />

results with MATLAB reflect the potentiality <strong>of</strong> this controller for the fuel cell based DG applications.

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