POWER GENERATION SYSTEM AND POWER GENERATION SYSTEM OPERATING METHOD

摘要

PROBLEM TO BE SOLVED: To increase temperature of a fuel battery while stabilizing combustion of a gas turbine when the temperature of the fuel battery is increased.SOLUTION: The power generation system comprises: a gas turbine 11 having a compressor 21 and a combustor 22; an SOFC 13 having an air electrode and a fuel electrode and capable of combusting a catalyst at the air electrode; an exhaust air line 34 and an exhaust oxidative gas supply line 36 for supplying exhaust air A3 exhausted from an air electrode side of the SOFC 13 to the combustor 22; a second compression air supply line 31 for supplying compressed air A2 compressed by the compressor 21 to the air electrode of the SOFC 13; a catalyst-combusting fuel gas supply line 61 for supplying fuel gas L4 for combusting a catalyst at the air electrode of the SOFC 13; and a combustion catalyst 71 for combusting an unburnt component of the fuel gas L4 contained in the exhaust air A3 supplied to the combustor 22.