GASIFYING COMPLEX POWER GENERATION SYSTEM, CONTROL METHOD THEREFOR, FUEL GAS PRODUCING METHOD

摘要

Disclosed is a combined power generation unit 25 that is provided with a gasification unit including a gasification furnace 23 used to produce fuel gas and a gas turbine rotating using the fuel gas produced by the gasification unit to generate power. In order to produce the fuel gas required in the combined power generation unit 25 according to a required power load using the gasification unit, a feed-forward control of the gasification unit is performed, a dead time compensator 71 that compensates a lag and a dead time occurring while the fuel gas is fed from the gasification unit to the combined power generation unit is provided, and the gasification unit is operated using a zero flare process. A dead time compensator 46 is provided to delay the power load that is required in the combined power generation unit 25 on the basis of the lag and the dead time of the gasification unit so that the combined power generation unit 25 is operated while a follow-up is performed with a predetermined delay.