FUEL CELL POWER GENERATION SYSTEM AND METHOD FOR OPERATING SAME

摘要

Disclosed is a fuel cell power generation system provided with a fuel cell (3), a fuel gas supply mechanism (10), an oxidant gas supply mechanism (11), a power output device (18), a cooling mechanism (12), and a controller (20) which is configured to perform a first process for controlling power to be supplied from the power output device (18) to either an internal load (21) and/or an external load (17) so that the voltage of the fuel cell (3) temporarily becomes higher than or equal to a first voltage at which a sulfur compound adhering to a cathode (2b) is oxidized, and thereafter perform a second process for cooling the fuel cell (3) by the cooling mechanism (12) so that water vapor in the fuel cell (3) is condensed and stopping the supply of an oxidant gas from the oxidant gas supply mechanism (11).