SOLID OXIDE FUEL CELL SYSTEM

摘要

Summary To provide a solid oxide fuel cell system capable of avoiding the reduction of air electrodes. The present invention is a fuel cell system (1) having: a fuel cell module (2), a fuel supply apparatus (38), a water supply apparatus (28), an air supply apparatus (45), a reformer (20), and a control section (110) for controlling the extraction of power from a fuel cell module, whereby the controller includes a shutdown stop circuit (110a) for executing a shutdown stop when the fuel cell stack is above the oxidation suppression temperature, and after execution of a shutdown stop, during a period when pressure on the fuel electrode side is sufficiently higher than pressure on the air electrode side, and no reverse flow of air to the fuel electrode side is occurring, a temperature drop operation is executed whereby high temperature air remaining on the air electrode side is discharged.