EP3280884B1 - Procédé de refroidissement d'une turbine à vapeur - Google Patents

Procédé de refroidissement d'une turbine à vapeur Download PDF

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Publication number
EP3280884B1
EP3280884B1 EP16728922.2A EP16728922A EP3280884B1 EP 3280884 B1 EP3280884 B1 EP 3280884B1 EP 16728922 A EP16728922 A EP 16728922A EP 3280884 B1 EP3280884 B1 EP 3280884B1
Authority
EP
European Patent Office
Prior art keywords
cooling rate
steam
steam generator
determined
steam turbine
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.)
Active
Application number
EP16728922.2A
Other languages
German (de)
English (en)
Other versions
EP3280884A1 (fr
Inventor
Jan Greis
Oliver Stawarski
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 Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of EP3280884A1 publication Critical patent/EP3280884A1/fr
Application granted granted Critical
Publication of EP3280884B1 publication Critical patent/EP3280884B1/fr
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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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/12—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/003—Arrangements for measuring or testing
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Definitions

  • the invention relates to a method for cooling a steam turbine, as well as an associated automation system, wherein the steam turbine is flowed with steam from a steam generator, with, among other things, a predetermined cooling rate ⁇ is determined in front of the steam turbine, the actual cooling rate ⁇ tat is determined and with the specified Cooling rate ⁇ before is compared.
  • Steam turbines are used in power plants to generate energy. After successful commissioning, the steam turbines are used more or less continuously. Nevertheless, it is necessary to carry out revisions every now and then. Here it is necessary that the steam turbines are taken out of operation and cooled down.
  • the “forced cooling” essentially comprises three phases, with the steam temperature being reduced in power mode in the first phase and after switching off, there is then natural cooling and then "cold drawing” with ambient air, the air being drawn through the steam turbine via an evacuation device .
  • the steam turbine is therefore cooled in advance by reducing the steam temperature in power mode.
  • This reduction in the steam temperature can be achieved by using boiler spraying and / or by reducing the output of the furnace or the gas turbine (in the case of a combined cycle plant).
  • care must be taken that the steam temperatures are reduced in such a way that the design limits of the steam turbine are not exceeded.
  • the steam temperature can be reduced using rigid ramps.
  • the disadvantage here is that any given freedoms are not fully exhausted. This, in turn, leads to a loss of time in which valuable fuel could be wasted.
  • the documents AU 2008 202 733 A1 and EP 2 620 604 A1 show cooling processes for steam turbines in which a feedback The temperature gradient in the turbine is only regulated after the end of power operation.
  • the object of the invention is therefore to accelerate the method for cooling the steam turbine.
  • a method for cooling a steam turbine is then used, as is defined by the appended independent claim 1.
  • This method includes, among other things, that the steam turbine is flowed with steam from a steam generator, wherein a predetermined cooling rate of the steam turbine is determined, the actual cooling rate is determined and compared with the predetermined cooling rate and the steam generator is operated in such a way that the actual cooling rate in Essentially corresponds to the specified cooling rate.
  • an essential feature of the invention is that a regulation is taken into account, which now regulates the steam temperature in such a way that the cooling of the steam turbine takes place within predetermined limits.
  • the specified cooling rate is determined by a finite element method, determined by measurements or determined by tests.
  • the temperature of the components is taken into account in the cooling rate.
  • the power plant 1 comprises a steam turbine 2, which is divided into a high-pressure turbine section 3, a medium-pressure turbine section 4 and a low-pressure turbine section 5.
  • the power plant 1 also includes a steam generator 6 and a condenser 7, which is fluidically connected to the low-pressure turbine section 5.
  • Live steam is generated in the steam generator 6 and flows through a live steam line 8 into the high-pressure turbine section 3 and from there through an outlet 9 to a reheater 10.
  • the steam is brought back to a higher temperature and then flows into the medium-pressure turbine section 4. From there, the steam flows via an overflow line 11 to the low-pressure turbine section 5 and finally via an exhaust line 12 into the condenser 7.
  • the condenser 7 the steam condenses to water and is fed back to the steam generator 6 by means of a pump 13.
  • the automation system supplies an output signal to the steam generator 6, which means that the steam generator 6 is operated in such a way that the actual cooling rate ⁇ tat essentially corresponds to the specified cooling rate ⁇ before.
  • the design limits are accordingly mapped in the steam turbine control, with a specification for cooling being calculated and made available to the steam generator 6 as a signal.
  • This optimal steam temperature makes optimal use of the design limits of the steam turbine 2 during cooling. It always checks the actual status and compares it with the permissible limits.
  • the optimal steam temperature will rapidly lower the temperature if there are still large allowances and it will decrease more slowly if there are only small allowances, such as B. near the design limit.
  • the temperatures of the steam turbine and thus the wall temperature limits are taken into account.
  • the specified cooling rate can be determined by a finite element method or by measurements or tests.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)

Claims (5)

  1. Procédé de refroidissement d'une turbine (2) à vapeur, la turbine (2) à vapeur étant alimentée en vapeur à partir d'un générateur (6) de vapeur,
    dans lequel on détermine un taux Ṫ vor de refroidissement donné à l'avance de la turbine (2) à vapeur,
    dans lequel on détermine le taux Ttat de refroidissement réel et on le compare au taux Ṫ vor de refroidissement donné à l'avance et l'on fait fonctionner le générateur (6) de vapeur de manière à ce que le taux Ṫ tat de refroidissement réel corresponde sensiblement au taux Ṫ vor de refroidissement donné à l'avance, dans lequel on fait fonctionner le générateur (6) de vapeur de manière à effectuer en fonctionnement de puissance un arrosage de chaudière et/ou on modifie en fonctionnement de puissance le chauffage de manière à réduire la puissance du générateur (6) de vapeur.
  2. Procédé suivant la revendication 1,
    dans lequel on détermine la vitesse Ṫ vor de refroidissement donnée à l'avance par une méthode aux éléments finis, on la détermine par des mesures ou on la détermine par des tests.
  3. Procédé suivant la revendication 1 ou 2,
    dans lequel dans la vitesse de refroidissement on tient compte des températures des pièces de la turbine (2) à vapeur.
  4. Procédé suivant la revendication 3
    dans lequel on détermine une température sur une paroi Ṫ I intérieure et une température sur une paroi Ṫ A extérieure et une différence de température Ṫ A - Ṫ I n'est ni supérieure ni inférieure à une valeur ΔṪ AI limite donnée à l'avance.
  5. Système d'automatisation,
    constitué pour effectuer un procédé
    suivant les revendications 1 à 4 de manière automatisée, dans lequel le système d'automatisation comprend des moyens de détermination automatisée de la vitesse de refroidissement réelle et est constitué pour comparer de manière automatisée la vitesse de refroidissement réelle à une vitesse de refroidissement donnée à l'avance, le système d'automatisation comprenant en outre des moyens de commande automatisée de l'arrosage de chaudière du générateur (6) de vapeur en fonctionnement en puissance et/ou de commande automatisée du chauffage du générateur de vapeur en fonctionnement en puissance et, étant constituée pour commander ces moyens automatisés de manière à arriver à la puissance du générateur (6) de vapeur de manière à ce que la vitesse de refroidissement réelle corresponde sensiblement à la vitesse de refroidissement donnée à l'avance.
EP16728922.2A 2015-06-24 2016-06-08 Procédé de refroidissement d'une turbine à vapeur Active EP3280884B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15173619.6A EP3109418A1 (fr) 2015-06-24 2015-06-24 Procédé de refroidissement d'une turbine à vapeur
PCT/EP2016/062963 WO2016206972A1 (fr) 2015-06-24 2016-06-08 Procédé de refroidissement d'une turbine à vapeur

Publications (2)

Publication Number Publication Date
EP3280884A1 EP3280884A1 (fr) 2018-02-14
EP3280884B1 true EP3280884B1 (fr) 2021-07-28

Family

ID=53491304

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15173619.6A Withdrawn EP3109418A1 (fr) 2015-06-24 2015-06-24 Procédé de refroidissement d'une turbine à vapeur
EP16728922.2A Active EP3280884B1 (fr) 2015-06-24 2016-06-08 Procédé de refroidissement d'une turbine à vapeur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15173619.6A Withdrawn EP3109418A1 (fr) 2015-06-24 2015-06-24 Procédé de refroidissement d'une turbine à vapeur

Country Status (6)

Country Link
US (1) US10422251B2 (fr)
EP (2) EP3109418A1 (fr)
JP (1) JP2018523048A (fr)
KR (1) KR102055378B1 (fr)
CN (1) CN107889514B (fr)
WO (1) WO2016206972A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852592B (zh) * 2020-06-22 2021-11-19 西安交通大学 基于火电中间再热式凝汽机组的无蒸汽运行系统及方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588265A (en) * 1968-04-19 1971-06-28 Westinghouse Electric Corp System and method for providing steam turbine operation with improved dynamics
JPS5537762B2 (fr) * 1973-06-29 1980-09-30
US4227093A (en) * 1973-08-24 1980-10-07 Westinghouse Electric Corp. Systems and method for organizing computer programs for operating a steam turbine with digital computer control
US4179742A (en) * 1978-04-06 1979-12-18 Westinghouse Electric Corp. System for intelligently selecting the mode of control of a power plant
US4213935A (en) * 1978-06-19 1980-07-22 John Zink Company Apparatus for use in conjunction with boiler flue gases for generating inert blanketing gases
US5433079A (en) * 1994-03-08 1995-07-18 General Electric Company Automated steam turbine startup method and apparatus therefor
CA2438353C (fr) 2001-06-18 2009-08-25 Hitachi, Ltd. Methode de diagnostique d'etat d'une turbine a gaz et systeme de diagnostique connexe
US7699907B2 (en) * 2005-08-17 2010-04-20 Air Liquide Process & Construction, Inc. Apparatus and methods for gas separation
JP2007138856A (ja) * 2005-11-21 2007-06-07 Chugoku Electric Power Co Inc:The 蒸気タービンプラントの起動スケジュール予測システムおよび予測方法、ならびに予測用プログラムおよび該プログラムを格納した記録媒体
JP4931511B2 (ja) * 2006-08-08 2012-05-16 中国電力株式会社 応力緩和を考慮した逆解析による高温部材のクリープ余寿命の評価方法
AU2008202733A1 (en) * 2007-06-20 2009-01-22 Stanwell Corporation Limited Method and apparatus for cooling a steam turbine
JP4974944B2 (ja) * 2008-03-31 2012-07-11 中国電力株式会社 発電プラントの運転停止システム
ES2525168T3 (es) * 2010-10-19 2014-12-18 Alstom Technology Ltd Método de funcionamiento de una planta de energía de ciclo combinado con cogeneración, y a una planta de energía de ciclo combinado para realizar el método
EP2620604A1 (fr) * 2012-01-25 2013-07-31 Siemens Aktiengesellschaft Procédé pour contrôler un processus de refroidissement de composants de turbine
JP6071421B2 (ja) * 2012-10-26 2017-02-01 三菱日立パワーシステムズ株式会社 コンバインドサイクルプラント、及びその停止方法、及びその制御装置
US9200799B2 (en) * 2013-01-07 2015-12-01 Glasspoint Solar, Inc. Systems and methods for selectively producing steam from solar collectors and heaters for processes including enhanced oil recovery

Also Published As

Publication number Publication date
US10422251B2 (en) 2019-09-24
KR102055378B1 (ko) 2019-12-12
US20180163572A1 (en) 2018-06-14
WO2016206972A1 (fr) 2016-12-29
CN107889514A (zh) 2018-04-06
KR20180019210A (ko) 2018-02-23
EP3109418A1 (fr) 2016-12-28
CN107889514B (zh) 2020-02-21
JP2018523048A (ja) 2018-08-16
EP3280884A1 (fr) 2018-02-14

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