COMBINED CYCLE POWER PLANT AND METHOD FOR OPERATING SUCH A COMBINED CYCLE POWER PLANT

The invention relates to a combined cycle power plant (10a) comprising a gas turbine (11a,b) the exhaust gas outlet of which is connected to a heat recovery steam generator (19), which is part of a water/steam cycle (35), whereby, for having a large power reserve and at the same time a higher design...

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Bibliographische Detailangaben
Hauptverfasser:	LI, HONGTAO, RUCHTI, CHRISTOPH, NUGROHO, TJIPTADY, PEDRETTI, CAMILLE
Format:	Patent
Sprache:	eng ; fre
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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OF STEAM GENERATION NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION STEAM ACCUMULATORS STEAM BOILERS STEAM ENGINE PLANTS STEAM ENGINES STEAM GENERATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a combined cycle power plant (10a) comprising a gas turbine (11a,b) the exhaust gas outlet of which is connected to a heat recovery steam generator (19), which is part of a water/steam cycle (35), whereby, for having a large power reserve and at the same time a higher design performance when operated at base load, the gas turbine (11a) is designed with a steam injection capability (26) for power augmentation. For having a large power reserve at improved and optimized design performance when the plant is being operated at base load, the gas turbine (11a) comprises at least one combustor (15, 16), and a compressor (12) for providing cooling air for that gas turbine (11a,b), which is extracted from the compressor (12) and cooled down in at least one cooling air cooler (17, 18). The steam for steam injection is generated in said cooling air cooler (17, 18), whereby said steam is injected into an air side inlet or outlet of said cooling air cooler (17, 18) and/or directly into said at least one combustor (15, 16). The heat recovery steam generator (19) is equipped with a supplementary firing (22, 22´), which is at least a single stage supplementary firing (22) to increase the high pressure steam production and providing augmentation power as power reserve to a grid when required. L'invention concerne une centrale électrique à cycle combiné (10a) comprenant une turbine à gaz (11a, b) dont la sortie des gaz d'échappement est raccordée à un générateur de vapeur à récupération de chaleur (19) qui fait partie d'un cycle eau/vapeur (35), et afin d'avoir une grande réserve de puissance et simultanément une meilleure performance de conception lors de l'exploitation à la charge de base, la conception de la turbine à gaz (11a) inclut une capacité d'injection de vapeur (26) pour augmenter la puissance. Afin d'avoir une grande réserve de puissance à la performance de conception améliorée et optimisée lorsque la centrale est exploitée à la charge de base, la turbine à gaz (11a) comprend au moins une chambre de combustion (15, 16) et un compresseur (12) permettant de fournir de l'air de refroidissement à cette turbine à gaz (11a, b) qui est extrait du compresseur (12) et refroidi dans au moins un refroidisseur d'air de refroidissement (17, 18). La vapeur pour l'injection de vapeur est produite dans ledit refroidisseur d'air de refroidissement (17, 18), ladite vapeur étant injectée dans une entrée ou une sortie côté air dudit refroidisseur d'air de re