| 摘要 |
PROBLEM TO BE SOLVED: To suppress a change in the rotating speed or output power of a gas turbine by reducing influences on combustion when changing over a fuel during operation of the gas turbine. SOLUTION: A fuel reduction ratio generating function 31 and a fuel increase ratio generating function 32 are provided for representing a ratio at which the flow rate of a fuel being used is reduced and for representing a ratio at which the flow rate of a selective fuel is increased, respectively, during a fuel change-over from the fuel being used to the selective fuel. During the fuel change-over, a target heating value for the fuel being used is found by multiplying a target value for the flow rate of the fuel based on a heating value by the ratio determined by the fuel reduction ratio generating function 31 while a target heating value for the selective fuel is found by multiplying it by the ratio determined by the fuel increase ratio generating function 32. A opening command for a fuel control valve is generated in accordance with the found target heating value for the fuel being used, and an opening command for the fuel control valve is generated in accordance with the found target heating value for the selective fuel. COPYRIGHT: (C)2004,JPO
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