초록 ▼

In a method of operating a combined-cycle plant, which essentially comprises a gas-turbine group, a waste-heat steam generator (14) and a steam cycle equipped with a steam turbine (17), the gas-turbine group being operated according to sequential combustion (4, 9), at least one steam quantity (50) p

In a method of operating a combined-cycle plant, which essentially comprises a gas-turbine group, a waste-heat steam generator (14) and a steam cycle equipped with a steam turbine (17), the gas-turbine group being operated according to sequential combustion (4, 9), at least one steam quantity (50) proportioned by a control (C) is extracted at a suitable point in terms of pressure in order to increase the operational output of the steam turbine (17). This steam quantity (50) is then fed to the gas-turbine group at a suitable point in such a way that, to maintain the output thus induced, at least the metering (D, E) of a fuel quantity (5, 10) at at least one combustion chamber (4, 9) is influenced.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of operating a combined-cycle plant, the plant including a gas-turbine group having a compressor unit, a least one combustion chamber, and at least one gas turbine, a waste-heat steam generat

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A method of operating a combined-cycle plant, the plant including a gas-turbine group having a compressor unit, a least one combustion chamber, and at least one gas turbine, a waste-heat steam generator connected to receive exhaust gas from the at least one gas turbine, a steam cycle having at least one steam turbine, and a generator driven by the at least one gas turbine and the at least one steam turbine, the method comprising the steps of:generating a flow of pressurized steam in the waste-heat steam generator;feeding the pressurized steam to the at least one steam turbine;extracting a quantity of partially expanded steam from the at least one steam turbine;feeding the extracted steam to a combustion air flow in the gas turbine group upstream of the at least one gas turbine;adjusting a quantity of fuel flow to the at least one combustion chamber for heating the extracted steam,wherein an output of the gas turbine group is increased by the heated extracted steam, and wherein the exhaust gases of the turbine group provide additional heat to the steam generator to increase a quantity of steam generated in the steam generator; andfeeding the increased quantity of steam to the steam turbine for an increase in output of the steam turbine.