COMBINED CYCLE PLANT, CONTROLLING DEVICE AND START-UP METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To shorten start-up time of a combined cycle plant, in a combined cycle plant, a device for controlling a combined cycle plant and a method for starting up a combined cycle plant.SOLUTION: The combined cycle plant includes: a gas turbine 11 having a compressor 21, a combustor 22 and a turbine 23; a heat recovery boiler 12 for generating steam by waste-heat from the gas turbine 11; a steam turbine 13 driven by the steam generated by the heat recovery boiler 12; and a control device 50 for setting so that stand-by load in start-up of the gas turbine 11 continuously changes in accordance with variation of metal temperature of the steam turbine 13.SELECTED DRAWING: Figure 2