| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a two-shaft gas turbine capable of starting a premixed combustion without the occurrence of a problem such as accident fire. <P>SOLUTION: A two-shaft gas turbine 1, including a compressor 7 provided with IGV 11, a combustor 8 configured to include a diffusion pilot burner and a plurality of premixed burners, and a high-pressure turbine 9 which is connected to the compressor 7 via a gas generator shaft 18, includes a control device 10 configured to include a fuel control unit 10a that calculates fuel flow rates to the combustor 8 on the basis of a size of load and an atmospheric temperature and controls a fuel control valve 14, and an IGV opening degree control unit 10b that calculates an air flow rate to the combustor 8 to control the IGV 11, on the basis of the size of load, the atmospheric temperature and a rotational speed of the gas generator shaft 18, and a switching control unit 10c that calculates a fuel-to-air ratio on the basis of the fuel flow rate and air flow rate to the combustor 8, and switches premixed fuel systems that supply fuel to the premixed burners, according to the fuel-to-air ratio. <P>COPYRIGHT: (C)2012,JPO&INPIT |
