EP2592241A1 - Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence - Google Patents

Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence Download PDF

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Publication number
EP2592241A1
EP2592241A1 EP11188956.4A EP11188956A EP2592241A1 EP 2592241 A1 EP2592241 A1 EP 2592241A1 EP 11188956 A EP11188956 A EP 11188956A EP 2592241 A1 EP2592241 A1 EP 2592241A1
Authority
EP
European Patent Office
Prior art keywords
steam
turbine
steam turbine
pressure
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11188956.4A
Other languages
German (de)
English (en)
Inventor
Andreas Pickard
Erich Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP11188956.4A priority Critical patent/EP2592241A1/fr
Priority to CN201280055971.5A priority patent/CN104246151B/zh
Priority to EP14004089.0A priority patent/EP2907980A1/fr
Priority to KR1020147012600A priority patent/KR20140088145A/ko
Priority to PCT/EP2012/071478 priority patent/WO2013072183A2/fr
Priority to IN869KON2014 priority patent/IN2014KN00869A/en
Priority to US14/356,158 priority patent/US20140345278A1/en
Priority to EP12780192.6A priority patent/EP2798164A2/fr
Priority to RU2014124127/06A priority patent/RU2014124127A/ru
Publication of EP2592241A1 publication Critical patent/EP2592241A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/02—Use of accumulators and specific engine types; Control thereof
    • F01K3/04—Use of accumulators and specific engine types; Control thereof the engine being of multiple-inlet-pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F01K23/101—Regulating means specially adapted therefor

Definitions

  • the invention relates to the frequency support operation of a gas and steam turbine plant.
  • the EP 1 164 254 B1 describes a gas and steam turbine plant with steam diversion for the peak load coverage, ie for additional power at full load.
  • a portion of the steam generated in the heat recovery steam generator bypass ducts past the turbine inlets downstream of these turbine inlets arranged further inputs the turbine parts, whereby the pressure in the heat recovery steam generator can be kept substantially constant and the absorption capacity of the steam turbine and thus the output power are increased ,
  • the object of the invention is to provide a method for the frequency support operation of a gas and steam turbine plant, which provides an improved power reserve available.
  • the invention solves this problem by providing that in the operation of a gas and steam turbine plant with a gas turbine, a steam turbine and a heat recovery steam generator, in the heat exchange with exhaust gas from the gas turbine steam for the steam turbine can be generated for frequency support in the power grid from a stationary operation out the absorption capacity of the steam turbine increased and the pressure in the heat recovery steam generator can be lowered to use storage reserves in the heat recovery steam generator for increased steam generation, and that the heat recovery steam generator so quickly heat energy is supplied that a performance curve of the gas and steam turbine plant as a result of the increase Damping ability of the steam turbine and the pressure reduction in the heat recovery steam generator is greater than or equal to an immediately prior existing power of stationary operation.
  • the invention is therefore based on the idea to use storage reserves in the heat recovery steam generator to generate additional steam at sudden opening of the valves.
  • the pressure drop in the heat recovery steam generator additionally generates steam and a sufficiently large and rapid supply of heat energy is the usual dent in the performance curve prevent.
  • This method can provide control power at partial and full load.
  • the flexibility and efficiency of the power plant can be significantly increased, since high power requirements additional energy is available, which leads to increased revenue especially at high electricity revenues in electricity markets and the operation of the system designed more economical (peak load capacity).
  • the primary frequency support or the peak load operation it is not necessary for the primary frequency support or the peak load operation to design the high-pressure or the reheat part higher in the pressure than for the nominal operation.
  • the load range of the power plant can be extended, since even the low load operation can be set more flexible.
  • At least one valve in a bypass channel for bypassing a steam turbine stage or a steam turbine module is opened.
  • Valve of a control wheel on a high-pressure turbine and / or a medium-pressure turbine is opened.
  • the heat energy is supplied by an additional power of the gas turbine and thus an increased exhaust gas flow.
  • the heat energy is supplied via an additional firing.
  • this must be dimensioned accordingly.
  • FIG. 1 shows a gas and steam turbine plant 1, which includes a gas turbine 2 and a steam turbine 3.
  • a gas turbine 2 and a steam turbine 3.
  • a rotor of the gas turbine, a rotor of a generator 5 and a rotor of the steam turbine 3 are coupled together, the rotor of the steam turbine 3 and the Rotor of the generator 4 via a clutch 6 rotatably separable from each other and can be coupled.
  • the rotor of the generator 5 and the gas turbine 2 are rigidly connected to each other via the shaft 4.
  • a flue gas outlet of the gas turbine 2 is connected via an exhaust pipe 7 with a heat recovery steam generator 8, which is provided for generating the operating steam of the steam turbine 3 from waste heat of the gas turbine.
  • a compressor 9 is driven by the rotating rotor of the gas turbine 2 via the shaft 4, which sucks combustion air from the environment and a combustion chamber 10 supplies.
  • the combustion air is mixed with fuel supplied by a fuel supply 11 and burned and the hot, pressurized exhaust gases are supplied to the gas turbine 12 and there relaxed under the power of work.
  • the still about 500 to 600 ° C hot exhaust gases are then fed through the exhaust pipe 7 to the heat recovery steam generator 8 and flow through this until they pass through a chimney 13 into the environment.
  • superheated steam is supplied through a steam discharge line 24 of a high pressure stage 25 of the steam turbine 3 and there relaxed under the power of work.
  • the shaft 4 and thus the generator 5 is moved to generate electrical energy.
  • the partially relaxed in the high-pressure stage 25 hot steam is then fed to the high-pressure reheater 15, where it is reheated and fed via a derivative 26 a medium-pressure stage 27 of the steam turbine 3 and there relaxed under the power of mechanical work.
  • the there partially relaxed steam is via an overflow 28 of a low pressure stage 29th fed to the steam turbine 3 and further relaxed there with the release of mechanical energy.
  • the expanded steam is condensed in the condenser 30 of the steam turbine 3, and the resulting condensate is a condensate pump 31 directly to a low pressure stage 32 of the heat recovery steam generator 8 or via a feed 33 - and provided by the corresponding pressure - a medium-pressure stage 34 or a high-pressure stage 35th the heat recovery steam generator 8 supplies, where the condensate is evaporated.
  • the steam is supplied via the corresponding outlets 24, 26, 36 of the heat recovery steam generator 8 back to the steam turbine 3 for relaxation and performance mechanical work.
  • shut-off valves 37 and 38 are arranged. From the high pressure stage 25 of the steam turbine 3 leading steam discharge line 24 branches off a bypass channel 39 with a shut-off valve 40 for bypassing the high-pressure stage 25 from. Similarly, a bypass channel 41 branches off with a shut-off valve 42 for bypassing the intermediate-pressure stage 27.
  • a first control wheel 43 is attached to the rotor of the steam turbine 3.
  • a second control wheel 44 is attached to the rotor of the steam turbine 3.
  • a control wheel comprises valves controlled via valves, which can be acted upon by segments of a turbine. Depending on how many of the valves are opened, a more or less large amount of additional steam flows through the nozzles into the turbine.
  • FIG. 1 shows an additional firing 45 at the entrance of the heat recovery steam generator 8, in which the gas turbine exhaust gas, which still contains much oxygen, fuel is added and the mixture is burned.
  • the live steam over the temperature of the gas turbine exhaust gas can be overheated or for generating process steam when the steam generation is to be decoupled from the power generation of the gas turbine 2.
  • supplemental firing 45 may be of interest to increase the output of electrical power during peak demand periods.
  • the inventive method provides that the steam mass flow is increased by the steam turbine in the short term by opening an overload valve 40, 42 and a turbine bypass 39, 41 and connected to the power of the steam turbine 3 increases rapidly (seconds range).
  • the overload introduction can be utilized both on the high-pressure turbine 25 for raising the live steam mass flow and on the medium-pressure turbine 27 for increasing the reheat steam mass flow as well as before each further turbine stage (for example low-pressure turbine 29).
  • the intake capacity of the steam turbine can be increased via a control wheel 43, 44 on the high-pressure turbine 25 and / or the medium-pressure turbine 27 by opening associated valves.
  • Storage reserves can be released from all pressure stages 32, 34, 35 of the heat recovery steam generator 8 (for example also medium and low pressure systems, if present).
  • the drum pressure e.g. by a pressure control valve 46 in the medium-pressure steam system 34, while the Aus Grandefil can be increased. This increase in steam mass flow rate is due to an increase in the absorption capacity of the steam turbine and an associated pressure drop in the system.
  • the decreasing storage effect either by a self-igniting supplementary firing 45 in the heat recovery steam generator 8, operated in continuous minimum load additional firing 45 or by existing power reserves in the gas turbine 2 (turning up the compressor vanes, over-firing, steam injection or water injection in the compressor. 9 or combustion chamber 10) compensated or further increased.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Turbines (AREA)
EP11188956.4A 2011-11-14 2011-11-14 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence Withdrawn EP2592241A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP11188956.4A EP2592241A1 (fr) 2011-11-14 2011-11-14 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence
CN201280055971.5A CN104246151B (zh) 2011-11-14 2012-10-30 用于频率保持运行燃气和蒸汽涡轮机设备的方法
EP14004089.0A EP2907980A1 (fr) 2011-11-14 2012-10-30 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour le support de fréquence
KR1020147012600A KR20140088145A (ko) 2011-11-14 2012-10-30 주파수 지원을 위한 가스 및 증기 터빈 설비의 작동 방법
PCT/EP2012/071478 WO2013072183A2 (fr) 2011-11-14 2012-10-30 Procédé permettant de faire fonctionner une installation à turbine à gaz et turbine à vapeur pour la stabilisation de la fréquence
IN869KON2014 IN2014KN00869A (fr) 2011-11-14 2012-10-30
US14/356,158 US20140345278A1 (en) 2011-11-14 2012-10-30 Method for operating a gas and steam turbine installation for frequency support
EP12780192.6A EP2798164A2 (fr) 2011-11-14 2012-10-30 Procédé permettant de faire fonctionner une installation à turbine à gaz et turbine à vapeur pour la stabilisation de la fréquence
RU2014124127/06A RU2014124127A (ru) 2011-11-14 2012-10-30 Способ эксплуатации парогазотурбинной установки с поддержанием частоты

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11188956.4A EP2592241A1 (fr) 2011-11-14 2011-11-14 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence

Publications (1)

Publication Number Publication Date
EP2592241A1 true EP2592241A1 (fr) 2013-05-15

Family

ID=47115955

Family Applications (3)

Application Number Title Priority Date Filing Date
EP11188956.4A Withdrawn EP2592241A1 (fr) 2011-11-14 2011-11-14 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour la stabilisation de fréquence
EP12780192.6A Withdrawn EP2798164A2 (fr) 2011-11-14 2012-10-30 Procédé permettant de faire fonctionner une installation à turbine à gaz et turbine à vapeur pour la stabilisation de la fréquence
EP14004089.0A Withdrawn EP2907980A1 (fr) 2011-11-14 2012-10-30 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour le support de fréquence

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP12780192.6A Withdrawn EP2798164A2 (fr) 2011-11-14 2012-10-30 Procédé permettant de faire fonctionner une installation à turbine à gaz et turbine à vapeur pour la stabilisation de la fréquence
EP14004089.0A Withdrawn EP2907980A1 (fr) 2011-11-14 2012-10-30 Procédé de fonctionnement d'une installation de turbine à gaz et à vapeur pour le support de fréquence

Country Status (7)

Country Link
US (1) US20140345278A1 (fr)
EP (3) EP2592241A1 (fr)
KR (1) KR20140088145A (fr)
CN (1) CN104246151B (fr)
IN (1) IN2014KN00869A (fr)
RU (1) RU2014124127A (fr)
WO (1) WO2013072183A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918797A1 (fr) * 2014-03-12 2015-09-16 Siemens Aktiengesellschaft Procédé destiné au fonctionnement d'une centrale à vapeur
EP2918796A1 (fr) * 2014-03-13 2015-09-16 Siemens Aktiengesellschaft Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2685055A1 (fr) * 2012-07-12 2014-01-15 Siemens Aktiengesellschaft Procédé destiné au soutien d'une fréquence du réseau
US9243519B2 (en) * 2012-09-06 2016-01-26 General Electric Company Systems and methods for accelerating droop response to frequency variation of an electrical grid in a combined cycle power plant
JP2017044131A (ja) * 2015-08-26 2017-03-02 株式会社東芝 蒸気タービン設備
EP3301267A1 (fr) * 2016-09-29 2018-04-04 Siemens Aktiengesellschaft Procédé de fonctionnement d'un turbo-générateur et le dispositif
JP7234266B2 (ja) 2018-06-22 2023-03-07 シーメンス エナジー グローバル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 発電プラントを運転するための方法
CN111507011B (zh) * 2020-04-26 2020-11-17 国电南京电力试验研究有限公司 供热抽汽对汽轮机滑压运行影响量的修正方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976914A1 (fr) * 1998-07-29 2000-02-02 Asea Brown Boveri AG Installation et procédé pour fournir rapidement une réserve de puissance dans des centrales combinées avec turbines à gaz et à vapeur
EP1164254B1 (fr) 2000-06-13 2009-04-15 General Electric Company Cycles de pointe optimisés pour turbines à vapeur utilisant une dérivation de vapeur et procédé correspondant
US20090277183A1 (en) * 2008-05-12 2009-11-12 Petrobras Energia S.A. Primary frequency regulation method through joint control in combined cycle turbines

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031404A (en) * 1974-08-08 1977-06-21 Westinghouse Electric Corporation Combined cycle electric power plant and a heat recovery steam generator having improved temperature control of the steam generated
ZA835029B (en) * 1982-09-27 1984-03-28 English Electric Co Ltd Power-generation plant and method
US4578944A (en) * 1984-10-25 1986-04-01 Westinghouse Electric Corp. Heat recovery steam generator outlet temperature control system for a combined cycle power plant
DE10042317A1 (de) * 2000-08-29 2002-03-14 Alstom Power Nv Dampfturbine und Verfahren zur Einleitung von Beipassdampf
DE10115131A1 (de) * 2001-03-27 2002-10-17 Alstom Switzerland Ltd Verfahren zur sofortigen, schnellen und temporären Erhöhung der Leistung eines Kombikraftwerkes
AR029828A1 (es) * 2001-07-13 2003-07-16 Petrobras En S A Metodo para la regulacion primaria de frecuencia en turbinas de vapor de ciclo combinado
WO2006097495A2 (fr) * 2005-03-18 2006-09-21 Siemens Aktiengesellschaft Procede et dispositif de production d'une puissance de regulation au moyen d'un systeme combine de turbine a gaz et de turbine a vapeur
US7608938B2 (en) * 2006-10-12 2009-10-27 General Electric Company Methods and apparatus for electric power grid frequency stabilization
PL2098691T3 (pl) * 2008-03-06 2013-12-31 Ansaldo Energia Spa Sposób sterowania instalacją o cyklu kombinowanym oraz instalacja o cyklu kombinowanym
EP2136035A1 (fr) * 2008-06-16 2009-12-23 Siemens Aktiengesellschaft Fonctionnement d'une installation à turbines à gaz et à vapeur par convertisseur de fréquence

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976914A1 (fr) * 1998-07-29 2000-02-02 Asea Brown Boveri AG Installation et procédé pour fournir rapidement une réserve de puissance dans des centrales combinées avec turbines à gaz et à vapeur
EP1164254B1 (fr) 2000-06-13 2009-04-15 General Electric Company Cycles de pointe optimisés pour turbines à vapeur utilisant une dérivation de vapeur et procédé correspondant
US20090277183A1 (en) * 2008-05-12 2009-11-12 Petrobras Energia S.A. Primary frequency regulation method through joint control in combined cycle turbines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918797A1 (fr) * 2014-03-12 2015-09-16 Siemens Aktiengesellschaft Procédé destiné au fonctionnement d'une centrale à vapeur
EP2918796A1 (fr) * 2014-03-13 2015-09-16 Siemens Aktiengesellschaft Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour
WO2015135772A1 (fr) * 2014-03-13 2015-09-17 Siemens Aktiengesellschaft Centrale électrique à vapeur équipée d'un générateur de vapeur comportant une vanne de maintien de pression de tambour

Also Published As

Publication number Publication date
CN104246151A (zh) 2014-12-24
WO2013072183A3 (fr) 2014-10-02
EP2907980A1 (fr) 2015-08-19
KR20140088145A (ko) 2014-07-09
EP2798164A2 (fr) 2014-11-05
IN2014KN00869A (fr) 2015-10-02
RU2014124127A (ru) 2015-12-27
CN104246151B (zh) 2016-07-13
WO2013072183A2 (fr) 2013-05-23
US20140345278A1 (en) 2014-11-27

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