Patent ID: 7358622

Claim:
A method of controlling a distributed-power-generation system, the method comprised of: a) sensing a rotation speed of a rotation axis of a motor/generator unit; b) comparing the sensed rotation speed with a predefined reference speed; c) changing the rotation speed to match the reference speed by controlling an amount of current supplied to the motor/generator; d) converting AC power produced by the motor/generator unit into DC power through a smoothing circuit; e) supplying the converted DC power along with DC power produced by a fuel cell to the main inverter; f) comparing the DC power supplied to the main inverter with a predefined reference power; g) altering the DC power produced by the fuel cell and changing the DC power supplied to the main inverter to match the predefined reference power; and h) supplying the DC power to one of the main inverter and a three-phase power system.