| 摘要 |
PURPOSE:To prevent the lack of gas and safely operate a fuel cell power generation system without excess supply of a reaction gas and correction of a reaction gas flow rate by installing a current increasing/decreasing instruction means, a reaction gas flow rate control means, a delay setting means, and a load control means. CONSTITUTION:A current increasing/decreasing instruction means 10 converts the variation of a set value of a load setting device 11 into an adding current signal and a subtracting current signal which indicate a certain increasing/decreasing speed of the output d.c. current of a fuel cell, then outputs the converted signals. This signal is utilized as a raw fuel and output d.c. current increasing/decreasing instruction means. A reaction gas (raw fuel) flow rate control means 20 computes a reaction gas set flow rate QS from the adding current signal, a d.c. current detecting value Id and a conversion factor previously obtained, and controls a reaction gas flow rate by a control valve 5 so that a detected flow rate Qf becomes equal to the flow rate QS. A set current value IS is updated through a delay set device 30 and a load control means 40, and the output a.c. power P of a D/A converter 4 is controlled so as to bring the value Id close to the value IS. The lack of gas is prevented and power generating operation is stabilized. |
