Gasified fuel cell combined power generation system and operation method of gasified fuel cell combined power generation system

摘要

PROBLEM TO BE SOLVED: To provide a gasification fuel cell hybrid power generation system which enables the stabilization of combustion in a combustor to be supplied with a combustible gas having passed through a solid oxide fuel cell; and a method for operating such a gasification fuel cell hybrid power generation system.SOLUTION: A gasification fuel cell hybrid power generation system comprises: a gasification furnace 10 which gasifies a carbon hydride-originating fuel; a gas-purification part 20 which purifies the resultant gasified gas; a solid oxide fuel cell 30 which is supplied with the purified combustible gas and generates a power; a gas turbine 40 which has a combustor 41 to be supplied with the combustible gas having passed through the solid oxide fuel cell 30, and drives a power generator G; and a branching part 80 which is provided downstream of the gas-purification part 20 and upstream of the solid oxide fuel cell 30, and which supplies the solid oxide fuel cell 30 with the combustible gas purified by the gas-purification part 20, and supplies the combustible gas to the combustor 41 without passing through the solid oxide fuel cell 30.