| 摘要 |
PURPOSE:To permit a good control to be performed that additional combustion can be attained corresponding to a required amount of steam even when it large changes, by controlling not only a control valve for an additional combustion device but also a control valve for a gas turbine through a common ACC. CONSTITUTION:A fuel supply system for a gas turbine 1, to which a generator 2 is connected, is constituted of a fuel control valve 3 and a combustor 4. While waste gas, discharged from the gas turbine 1, is supplied to a waste heat boiler 6 through an additional combustion device 5, exchanging heat. Here a supply amount of fuel to the additional combustion device 5 is regulated by a control valve 7 controlled by a control part 8 through a signal wire (c) ' While a detection signal from a load sensor 9, provided in a steam takeout side of the waste heat boiler 6, is input to the control part 8 through a signal wire (b). In the above constitution, a control signal from the control part 8 is output to also the control valve 3 through a signal wire (a). And the control valve 3 bears a share of the control amount which can not be completely controlled by the control valve 7.
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