This paper presents the modeling, simulation, and
performance evaluation of a hybrid proton exchange
membrane fuel cell (PEMFC) with an energy storage system
utilized in a grid-connected distributed generation (DG)
system. To control the fuel cell/battery grid-side voltage source
inverter (VSI), the conventional voltage-mode and currentmode
control schemes with improved proportional-integral
(PI)-fuzzy controller for both inner current and outer voltage
control loops have been developed. The proposed PI-fuzzy
controller has the advantage of fuzzy control while
maintaining the simplicity and robustness of the PI controller.
The space-vector pulse width modulation technique has been
applied to the VSI control to generate a sinusoidal waveform.
A comparison has been made between the PI-fuzzy controller
and the PI controller in the VSI in terms of the generated total
harmonic distortion (THD). The results showed that by
applying PI-Fuzzy controller, the voltage and current THD
are reduced to 0.40 % and 3.77 %, respectively compared to
0.43 % voltage THD and 14.08 % current THD using the
conventional PI controller