DDC controller for inverters in fuel cell dispersed generation plant

This paper concerns a DDC controller developed for a self-commutated inverter in a fuel cell dispersed generation plant. The requirements for the DDC controller are shown and the basic function of the unit such as power control, RAS, and data communication with plant controller are described. The hardware and software configuration is explained. The study subjects on power control in line parallel operation are pointed out and new control technologies to solve them are proposed. Improvements on power control of such an inverter have been verified by experiments.<<ETX>>