| 摘要 |
PURPOSE:To improve the response performance of a device for controlling the flow rate of fuel for a fuel cell by setting a utilization rate of the fuel with a margin, producing a fuel flow rate corresponding to the utilization rate from a finction generator by using an output current as a parameter and controlling a fuel-flow-rate-controlling valve according to the output. CONSTITUTION:The output current of the fuel cell of a fuel-cell power generation system is detected with a detector 22. The required fuel flow rate function for the normal operation condition is produced with a function generator 32 to obtain a command value. The thus obtained command value is added to the signal of a differential block 33 to produce an amended command value 35. The amended command value 35 is then added to a fuel flow rate correction amount 55 obtained from both the temperature detector of an improver catalyst layer and a fuel flow rate 23. After that, the resulting value is fed to the input of a limiter block 60 for giving an upper and a lower limit (UL) and (LL) through a PID computing element 59, thereby controlling a valve 9 for controlling the amount of fuel fed to the fuel cell. As a result, controlling can be performed while always securing the lower limit of the supplied amount of the fuel and the response efficiency of fuel supply can be improved. |
