Fuel Cell Systems

Abstract

To provide a fuel cell system capable of continuing a power generation operation thereof as long as possible while appropriately producing a state that is determined, by a gas meter, to satisfy a non-leakage condition without sacrificing advantages for users as much as possible.SOLUTION: Provided is a fuel cell system S in which a control device 22 performs a leakage determination avoidance process including a standby process a preset number of times or more within a predetermined processing target period. In the standby process, a state where current extraction from a cell stack FC by a power conditioner 37 is stopped, is continued for a predetermined standby period while a reforming part suspends reception of a raw fuel gas from a gas meter. In a case where voltage reduction of the system power is detected by a voltage detector 34 that detects a voltage of the system power supplied from a power system 30 to a power line 31 during the leakage determination avoidance process, the control device 22 stops the leakage determination avoidance process and resumes current extraction from the cell stack FC by the power conditioner 37.SELECTED DRAWING: Figure 1