FUEL CELL POWER GENERATION SYSTEM AND FUEL CELL POWER GENERATION SYSTEM CONTROL METHOD

PROBLEM TO BE SOLVED: To provide a fuel cell power generation system which can generate electric power stably even when fuel composition changes.SOLUTION: The embodiment presented here is a fuel cell power generation system which controls a fuel supply line so as to lower a fuel flow below a fuel flow base when a reformer temperature measured by a thermometer is equal to or above the set temperature of the reformer or raise the fuel flow over the fuel flow base when the reformer temperature is below the set temperature. Furthermore, a necessary steam flow obtained from a necessary hydrogen flow to a fuel cell body is corrected by a temperature correction value obtained on the basis of a difference between the set temperature of the reformer and the temperature of the reformer measured by the thermometer, and a post-correction reforming water supply flow is calculated from this corrected necessary steam flow, whereby a reforming water supply line is controlled so that this post-correction reforming water supply flow will be reached.