METHOD FOR INCREASING THE POWER OF A COMBINED-CYCLE POWER PLANT, AND COMBINED-CYCLE POWER PLANT FOR CONDUCTING SAID METHOD

The invention relates to a method for temporary increasing the power of a gas turbine (11), which is part of a combined-cycle power plant (10), wherein the exhaust gas of said gas turbine (11) is used in a heat recovery steam generator (13) to generate steam for a water/steam cycle including a steam...

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Bibliographische Detailangaben
Hauptverfasser:	LILLEY, DARREL SHAYNE, LI, HONGTAO, REITER, WILHELM
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a method for temporary increasing the power of a gas turbine (11), which is part of a combined-cycle power plant (10), wherein the exhaust gas of said gas turbine (11) is used in a heat recovery steam generator (13) to generate steam for a water/steam cycle including a steam turbine (12) with a high pressure steam turbine (20), an intermediate pressure steam turbine (21) and a low pressure steam turbine (22), whereby said method comprises the step of injecting steam from said water/steam cycle at a predetermined injection pressure into said gas turbine (11). The efficiency is improved by taking steam of a lower pressure than said predetermined injection pressure from said water/steam cycle, increasing the pressure of said steam taken from said water/steam cycle to said predetermined injection pressure by subjecting it in separate compressing means (14) to a compression step, and injecting said compressed steam into said gas turbine (11). Preferably, said separate compressing means (14) comprises at least one steamdriven ejector.