POWER GENERATION SYSTEM AND METHOD FOR OPERATING SAID SYSTEM

A power generation system according to the present invention includes: a fuel cell unit (101) including a fuel cell (11), a hydrogen generator (14) having a first combustor (14b), and a case (12); a controller (102); a combustion unit (103) including a second combustor (17); and a discharge passage (70) formed to cause the case (12) and the combustion unit (103) to communicate with each other. In a case where the controller (102) causes one of the first combustor (14b) and the second combustor (17) to perform the ignition operation, the controller (102) maintains an operating state of the other combustor during the period of the ignition operation of the one combustor.