EP2480762B1 - Centrale thermique comprenant vanne de régulation de surcharge - Google Patents

Centrale thermique comprenant vanne de régulation de surcharge Download PDF

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Publication number
EP2480762B1
EP2480762B1 EP10760971.1A EP10760971A EP2480762B1 EP 2480762 B1 EP2480762 B1 EP 2480762B1 EP 10760971 A EP10760971 A EP 10760971A EP 2480762 B1 EP2480762 B1 EP 2480762B1
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EP
European Patent Office
Prior art keywords
steam
control valve
overload
pressure
line
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
EP10760971.1A
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German (de)
English (en)
Other versions
EP2480762A1 (fr
Inventor
Martin Bennauer
Edwin Gobrecht
Karsten Peters
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42753010&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2480762(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to PL10760971T priority Critical patent/PL2480762T3/pl
Priority to EP10760971.1A priority patent/EP2480762B1/fr
Publication of EP2480762A1 publication Critical patent/EP2480762A1/fr
Application granted granted Critical
Publication of EP2480762B1 publication Critical patent/EP2480762B1/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
    • 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
    • F01K7/22—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 the turbines having inter-stage steam heating
    • 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
    • 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
    • F01K7/18—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 the turbine being of multiple-inlet-pressure type
    • F01K7/20—Control means specially adapted therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making

Definitions

  • the invention relates to a power plant with a steam generator and a steam turbine according to the preamble of claim 1 and a method for operating a power plant according to the preamble of claim 5.
  • Power plants usually include a steam generator and a steam turbine, which are designed such that the internal energy of a water vapor is converted into mechanical rotational energy.
  • the generators driven by such steam turbines are usually operated at 50 Hz for the European market and 60 Hz for the US market.
  • Modern steam turbines are exposed to a water vapor, which may have a pressure of up to 350 bar and a temperature of up to 700 ° C.
  • This steam needed in the steam turbine is generated in the steam generator, which presents a challenge to the materials and components of the steam generator.
  • Particularly important components are power control, pressure control and speed control. In order to be able to operate the required 50 Hz or 60 Hz constant over a longer required period of time, high demands are placed on the controls.
  • Power plants are usually required for base load operation, which means that the entire system is constantly stressed over a longer period of time.
  • the frequency of the steam turbine shaft and the amount of steam leading to the steam turbine is substantially constant.
  • the torque applied to the generator torque changes, which means that the performance of the steam turbine could suddenly change, which should be prevented by the scheme.
  • a sudden change in the power of the steam turbine is also given by a possible fault.
  • a power plant is operated in the fixed pressure, sliding pressure or power mode.
  • the steam turbine has to transmit a lower torque to the generator. This could be accomplished by closing the valves arranged for delivery to the steam turbine or by providing the steam generator with a lower amount of steam at a lower pressure.
  • the pressure controls are designed such that a live steam pressure is brought in a high-pressure steam system during startup of the steam turbine to a fixed pressure value.
  • a diversion line is arranged such that the high-pressure steam inlet of the steam turbine is fluidly connected to the high-pressure steam outlet of the steam turbine.
  • the document DE 100 42 317 A1 discloses a steam turbine with at least one valve arrangement for the controlled introduction of live steam into the steam turbine.
  • the invention begins, whose task is to further develop a power plant such that a power loss is further reduced.
  • the invention proposes to arrange an overload line, which forms a fluidic connection between the steam generator and an overload stage of the steam turbine, and to arrange a arranged in the overload line overload control valve that is controlled by a pressure regulator.
  • the advantage of the invention is u.a.
  • the overload line acts as a sort of diverter station, thereby directing the steam into the steam turbine rather than uselessly bypassing the steam turbine.
  • the steam turbine is designed such that the overload stage, which is fluidically connected to the overload line, is designed such that the inflowing steam is converted work-giving.
  • An essential feature of the method according to the invention is that the pressure regulator that controls the overload control valve is designed such that a desired value can be set and the bypass control valve only opens when exceeding this setpoint when the overload control valve is already open is.
  • the overload control valve opens at partial load and / or full load.
  • the power plant can be operated more flexible overall, since both the power regulator and in the pre-pressure operation, the overload control valve can be controlled at each power. Another advantage is that the start-up and power losses are lower because the overload control valve directs the steam into the steam turbine rather than uselessly past the steam turbine into the condenser.
  • the power plant 1 comprises a steam turbine 2, which comprises a high-pressure turbine section 2a, a medium-pressure turbine section 2b and a low-pressure turbine section 2c. Via a steam generator 3, live steam passes via a live steam line 4 via a live steam control valve 5 into a high pressure steam inlet 6 of the high pressure turbine part 2a.
  • the power plant 1 comprises a bypass line 7, the main steam line 4 with a high-pressure steam outlet 8 of the high-pressure turbine section 2a fluidly connects. In the bypass 7, a bypass control valve 9 is arranged.
  • the power plant 1 comprises an overload line 10, which connects the steam generator 3 with an overload stage 11 of the high-pressure turbine part 2a fluidly.
  • an overload control valve 12 is arranged in the overload line 10.
  • the overload control valve 12 and the bypass control valve 9 are closed, the live steam control valve 5 is open and is controlled by a pressure regulator or power controller, not shown.
  • the effluent from the high-pressure turbine section 2a steam is referred to as a cold reheater steam and reheated in a reheater 13.
  • the effluent from the reheater 13 steam is referred to as hot superheated steam 14.
  • This hot superheated steam 14 flows through a medium-pressure control valve 15 in the medium-pressure turbine section 2b and is converted there relaxes work.
  • the steam flowing out of the medium-pressure turbine section 2b is fluidically connected via medium-pressure discharge lines 16 to the low-pressure steam inlet 17 of the low-pressure turbine section 2c.
  • the effluent from the low-pressure turbine section 2c steam is passed through a low-pressure discharge line 18 to a condenser 19, where it is converted to water and finally fed via a feedwater pump 20 to the steam generator 3, whereby a steam cycle is closed.
  • the vapor converted from thermal energy to rotational energy drives a shaft 21, which in turn drives a generator 22 which eventually provides electrical energy.
  • the main steam control valve 5, the overload control valve 12 and the bypass control valve 9 are also each arranged on its own separate pressure regulator.
  • the responsible for the overload control valve 12 pressure regulator is such designed that a setpoint is adjustable and the overload control valve 12 opens when exceeding this setpoint before the bypass control valve 9 opens.
  • the overload control valve 12 is usually opened at full load.
  • the steam flowing in via the overload stage 11 is converted into a work-giving function, instead of being uselessly guided past the high-pressure turbine section 2 a via the bypass line 7.
  • the efficiency of the power plant is further increased thereby.
  • a new pressure characteristic for the overload control valve 12 is set between a sliding pressure characteristic of the high-pressure turbine section 2a and the high-pressure bypass characteristic curve.
  • the overload control valve 12 opens and not the bypass control valve 9.
  • the overload control valve 12 then regulates a predetermined by the new pressure characteristic pressure.
  • the live steam is used via the overload control valve 12 in the high-pressure turbine section 2a and not useless passed to the steam turbine 2 in the condenser 19.
  • the FIG. 2 shows pressure curves as a function of the steam mass flow.
  • the live steam pressure 26 is plotted on the Y axis and the steam generator mass flow 25 is plotted on the X axis.
  • the sliding pressure characteristic 27 represents the usual course of operation. When the turbine valves are fully opened, the steam mass flow rates are fully absorbed by the turbine at the rated pressure.
  • the nominal value characteristic curve 28 of the bypass station runs at a pressure difference ⁇ P above the sliding pressure characteristic curve 27. This has the consequence that the bypass station is not opened too early. Only when the operating pressure has increased by the pressure difference, the bypass valves are opened.
  • an additional characteristic 29 for the overload valve control is included between the sliding pressure characteristic curve 27 and the nominal value characteristic curve 28.
  • the additional characteristic curve 29 is above the sliding pressure characteristic curve 27 and below the nominal value characteristic curve 28.

Claims (6)

  1. Centrale ( 1 ) électrique ayant un générateur ( 3 ) de
    vapeur d'une turbine ( 2 ) à vapeur, un conduit ( 4 ) pour de la vapeur fraîche pour apporter de la
    vapeur fraîche à la turbine ( 2 ) à vapeur, un conduit ( 10 ) de surcharge, qui forme une liaison en
    technique des fluides entre le générateur ( 3 ) de vapeur et un étage ( 11 ) de surcharge de la turbine ( 2 ) à vapeur,
    dans laquelle une vanne ( 12 ) de régulation de la surcharge est montée dans le conduit ( 10 ) de surcharge,
    dans laquelle
    il est monté un régleur de pression, qui est constitué pour commander la vanne ( 12 ) de régulation de la surcharge,
    caractérisé en ce que
    elle comprend un conduit ( 7 ) de dérivation, qui relie en technique des fluides l'entrée ( 6 ) pour de la vapeur sous haute pression à la sortie ( 8 ) pour de la vapeur sous haute pression de la turbine ( 2 ) à vapeur,
    dans laquelle le conduit ( 7 ) de dérivation comprend une vanne ( 9 ) de régulation de la dérivation et le régleur de pression est constitué de manière à pouvoir régler une valeur de consigne et, si cette valeur de consigne est dépassée, la vanne ( 9 ) de régulation de la dérivation ne s'ouvre que si la vanne ( 12 ) de régulation de la surcharge est déjà ouverte.
  2. Centrale ( 1 ) électrique suivant la revendication 1,
    dans laquelle la turbine ( 2 ) à vapeur comprend une sous-turbine ( 2a ) de haute pression et le conduit ( 10 ) de surcharge est relié en technique des fluides à l'étage ( 11 ) d'apport de la sous-turbine ( 2a ) de haute pression.
  3. Centrale ( 1 ) suivant l'une des revendications précédentes, dans laquelle l'étage ( 11 ) d'apport est constitué de manière à ce que la turbine ( 2 ) à vapeur transforme en cédant du travail la vapeur apportée par le conduit ( 10 ) de surcharge.
  4. Procédé pour faire fonctionner une centrale ( 1 ) électrique,
    dans lequel la centrale ( 1 ) électrique comprend une turbine ( 2 ) à vapeur ainsi qu'un conduit ( 4 ) pour de la vapeur fraîche pour l'apport de vapeur fraîche à la turbine ( 2 ) à vapeur et un conduit ( 10 ) de surcharge,
    dans lequel il est produit par le conduit ( 10 ) de surcharge une liaison en technique des fluides entre un générateur ( 3 ) de vapeur et un étage ( 11 ) de surcharge de la turbine ( 2 ) à vapeur,
    dans lequel on met une vanne ( 12 ) de régulation de la surcharge dans le conduit ( 10 ) de surcharge,
    dans lequel on met sur la vanne ( 12 ) de régulation de la surcharge un régleur de pression, qui est constitué pour commander la vanne ( 12 ) de régulation de la surcharge, caractérisé en ce que
    on met une dérivation ( 7 ) qui relie l'entrée ( 6 ) pour de la vapeur sous haute pression à la sortie ( 8 ) pour de la vapeur sous haute pression,
    dans lequel on met une vanne ( 9 ) de régulation de la dérivation et on constitue le régleur de pression de manière à pouvoir régler une valeur de consigne et la vanne ( 9 ) de régulation de la dérivation ne s'ouvre, si cette valeur de consigne est dépassée, que si la vanne ( 12 ) de régulation de la surcharge est déjà ouverte.
  5. Procédé suivant la revendication 4 ou 5,
    dans lequel la vanne ( 12 ) de régulation de la surcharge s'ouvre sous charge partielle et/ou sous pleine charge.
  6. Procédé suivant la revendication 4 ou 5,
    dans lequel on détend en cédant du travail la vapeur entrant par le conduit ( 10 ) de surcharge dans la turbine ( 2 ) à vapeur.
EP10760971.1A 2009-09-22 2010-09-21 Centrale thermique comprenant vanne de régulation de surcharge Active EP2480762B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL10760971T PL2480762T3 (pl) 2009-09-22 2010-09-21 Instalacja elektrowni z przeciążeniowym zaworem regulacyjnym
EP10760971.1A EP2480762B1 (fr) 2009-09-22 2010-09-21 Centrale thermique comprenant vanne de régulation de surcharge

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09012048A EP2299068A1 (fr) 2009-09-22 2009-09-22 Centrale thermique comprenant vanne de regulation de surcharge
EP10760971.1A EP2480762B1 (fr) 2009-09-22 2010-09-21 Centrale thermique comprenant vanne de régulation de surcharge
PCT/EP2010/063846 WO2011036136A1 (fr) 2009-09-22 2010-09-21 Centrale électrique comportant une vanne de régulation de surcharge

Publications (2)

Publication Number Publication Date
EP2480762A1 EP2480762A1 (fr) 2012-08-01
EP2480762B1 true EP2480762B1 (fr) 2014-08-13

Family

ID=42753010

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09012048A Withdrawn EP2299068A1 (fr) 2009-09-22 2009-09-22 Centrale thermique comprenant vanne de regulation de surcharge
EP10760971.1A Active EP2480762B1 (fr) 2009-09-22 2010-09-21 Centrale thermique comprenant vanne de régulation de surcharge

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09012048A Withdrawn EP2299068A1 (fr) 2009-09-22 2009-09-22 Centrale thermique comprenant vanne de regulation de surcharge

Country Status (8)

Country Link
US (1) US20120174584A1 (fr)
EP (2) EP2299068A1 (fr)
JP (1) JP5539521B2 (fr)
KR (1) KR101445179B1 (fr)
CN (1) CN102575530B (fr)
PL (1) PL2480762T3 (fr)
RU (1) RU2508454C2 (fr)
WO (1) WO2011036136A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5596631B2 (ja) * 2011-06-30 2014-09-24 株式会社神戸製鋼所 バイナリ発電装置
EP2546476A1 (fr) 2011-07-14 2013-01-16 Siemens Aktiengesellschaft Installation de turbines à vapeur et procédé pour opérer l'installation de turbines à vapeur
JP5823302B2 (ja) 2012-01-17 2015-11-25 株式会社東芝 蒸気タービン制御装置
JP5738227B2 (ja) * 2012-03-23 2015-06-17 三菱日立パワーシステムズ株式会社 蒸気タービン設備
EP2685055A1 (fr) * 2012-07-12 2014-01-15 Siemens Aktiengesellschaft Procédé destiné au soutien d'une fréquence du réseau
WO2015024886A1 (fr) * 2013-08-22 2015-02-26 Siemens Aktiengesellschaft Centrale thermique à vapeur et procédé permettant de faire fonctionner une centrale thermique à vapeur
JP6203600B2 (ja) * 2013-10-23 2017-09-27 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
CN104076801B (zh) * 2014-07-10 2017-02-15 大唐阳城发电有限责任公司 一种超高压远距离输电线路故障自动甩负荷系统及方法
CN105443166A (zh) * 2015-06-15 2016-03-30 江曼 一种发电站内的发电系统
EP3128136A1 (fr) * 2015-08-07 2017-02-08 Siemens Aktiengesellschaft Introduction de surcharge dans une turbine a vapeur
CN105134313B (zh) * 2015-08-14 2016-09-14 江苏永钢集团有限公司 汽轮机上抽汽阀的控制装置
US10871072B2 (en) * 2017-05-01 2020-12-22 General Electric Company Systems and methods for dynamic balancing of steam turbine rotor thrust
IT201800006187A1 (it) * 2018-06-11 2019-12-11 System for recovering waste heat and method thereof/sistema per recuperare calore residuo e relativo metodo
JP7137398B2 (ja) * 2018-08-08 2022-09-14 川崎重工業株式会社 コンバインドサイクル発電プラント

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Also Published As

Publication number Publication date
KR101445179B1 (ko) 2014-09-29
PL2480762T3 (pl) 2015-02-27
CN102575530B (zh) 2014-11-12
KR20120068946A (ko) 2012-06-27
WO2011036136A1 (fr) 2011-03-31
JP5539521B2 (ja) 2014-07-02
CN102575530A (zh) 2012-07-11
EP2299068A1 (fr) 2011-03-23
US20120174584A1 (en) 2012-07-12
RU2012116067A (ru) 2013-10-27
EP2480762A1 (fr) 2012-08-01
JP2013502538A (ja) 2013-01-24
RU2508454C2 (ru) 2014-02-27

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