| 摘要 |
Provided is a fuel flow control method of a gas turbine combustor provided in a humid air gas turbine, by which method NOx generation in the gas turbine combustor is restricted before and after the starting of humidification and combustion stability is made excellent. The fuel flow control method of a gas turbine combustor provided with a plurality of combustion sections, to which a fuel is individually supplied, a part of the gas turbine combustor including a combustion section or sections, which are more excellent in flame holding performance than the remaining part, the method evaluating a moisture content of a combustion air at the startup of humidification on the basis of a humidification water quantity and an air temperature after humidification and controlling a fuel ratio supplied to the combustion section or sections of excellent flame holding performance when fuel ratios of fuels supplied to the respective combustion sections are controlled in accordance with a humidified state of a compressed air brought about by a humidifier provided in the humid air gas turbine. |
| 主权项 |
1. A fuel flow control method of a gas turbine combustor provided in a humid air gas turbine comprising a compressor, the gas turbine combustor, in which a fuel is burned with the use of a compressed air compressed by the compressor to generate a combustion gas, a turbine driven by the combustion gas generated in the gas turbine combustor, and a humidifier for humidifying the compressed air compressed by the compressor and supplied to the gas turbine combustor, the gas turbine combustor comprising a plurality of combustion sections, each of the combustion sections including a plurality of fuel nozzles for supplying the fuel and a plurality of air flow passages for supplying a combustion air, the combustion air being at least a part of the compressed air, a part of the plurality of combustion sections provided in the gas turbine combustor being formed into at least one combustion section that has better flame holding performance than the remaining combustion sections, wherein fuel ratios of fuels, respectively, supplied to the plurality of combustion sections of the gas turbine combustor are controlled based on deviation between a load command and electric power generation,
the method comprising controlling a fuel flow rate to the combustion sections in the gas turbine combustor through evaluating a moisture content in the combustion air supplied to the gas turbine combustor based on a humidification water quantity and an air temperature after humidification in the humidifier; calculating an air-fuel ratio, using a combustion air flow rate supplied to the gas turbine combustor, to evaluate a combustion temperature in the combustion sections; and regulating a fuel ratio of the fuel flow rate supplied to the at least one combustion section and the fuel flow rate supplied to the remaining combustion sections based on the evaluation of a moisture content and the evaluation of a combustion temperature.
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