COMPOSITE POWER GENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To control the output of a gas turbine generator independently of a steam turbine generator in a composite power generation system. SOLUTION: The composite power generation system is provided with: a pressurized fluidized bed boiler 5 which burns a fuel while fluidizing it using a combustion air 2 supplied from a compressor 1 as the air for fluidization and combustion, and has a steam heat transfer tube 17 and an overheating heat transfer tube 18 therein; a steam turbine generator 20 driven by the steam generated in the boiler 5; and a gas turbine generator 11 driven by a combustion gas 7 discharged from the boiler 5. In this system, there is provided a control means 28 for controlling an amount of the air for fluidization and combustion to regulate the output of the gas turbine generator 11 to a target value.