EP2840234A1 - Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur - Google Patents

Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur Download PDF

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Publication number
EP2840234A1
EP2840234A1 EP13181441.0A EP13181441A EP2840234A1 EP 2840234 A1 EP2840234 A1 EP 2840234A1 EP 13181441 A EP13181441 A EP 13181441A EP 2840234 A1 EP2840234 A1 EP 2840234A1
Authority
EP
European Patent Office
Prior art keywords
valve
steam
steam turbine
mass flow
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.)
Withdrawn
Application number
EP13181441.0A
Other languages
German (de)
English (en)
Inventor
Simon Hecker
Christian Musch
Heinrich STÜER
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 EP13181441.0A priority Critical patent/EP2840234A1/fr
Priority to JP2016535395A priority patent/JP2016528437A/ja
Priority to EP14752802.0A priority patent/EP3004566A1/fr
Priority to KR1020167004191A priority patent/KR101834095B1/ko
Priority to US14/911,838 priority patent/US20160201500A1/en
Priority to PCT/EP2014/066775 priority patent/WO2015024769A1/fr
Priority to RU2016110662A priority patent/RU2638689C2/ru
Priority to CN201480046503.0A priority patent/CN105492729B/zh
Publication of EP2840234A1 publication Critical patent/EP2840234A1/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Withdrawn legal-status Critical Current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
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/02—Arrangement of sensing elements
    • F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • 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
    • 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
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/334—Vibration measurements

Definitions

  • the invention relates to a method for operating a steam turbine comprising a first steam supply connected to the steam turbine and a second steam feed and a first valve arranged in the first steam feed and a second valve arranged in the second steam feed.
  • steam is generated in a steam generator, which is fed via feed lines to the steam turbine.
  • the supply lines lead to steam supply.
  • valves are installed, which regulate the steam flow.
  • one or more valves are installed to control the steam turbine power in front of the steam turbine.
  • There are different modes of operation of a steam turbine conceivable. So it is possible to operate the steam turbine at full load. Another option is to operate the steam turbine at partial load. This means that through the valves and into the steam turbine not the entire mass flow, which is generated in the steam generator, flows into the steam turbine.
  • valves In this partial load operation, the valves are closed a little, so that only a part of the maximum possible total mass flow can flow into the steam turbine. However, the valves tend to perform vibrations in such a part load operation.
  • the flow conditions in the valve can change and possibly lead to an excitation of the entire structure, which is formed of valve and lines. This is to be regarded critically, because the temporally changing and possibly cyclically repeating loads the components are strongly stressed, which under certain circumstances could lead to cracks in the components, which should be avoided.
  • the invention has set itself the task of providing a method with which vibrations can be avoided.
  • the object of the invention is to provide a steam turbine arrangement whose valves do not lead to vibrations.
  • This object is achieved by a method for operating a steam turbine comprising a first steam supply connected to the steam turbine and a second steam supply and a first valve arranged in the first steam supply and a second valve arranged in the second steam supply, wherein the first Valve approaches and the second valve ascends.
  • the invention proposes to operate in a steam power plant having more than one valve, the valves such that they are actuated asymmetrically. This is done according to the invention in that a critical operating state of a single valve is detected. So that the mass flow into the steam turbine takes place uniformly, the second valve, which is not in the critical operating state, is adapted to the critical operating state of the first valve. This means that the valve openings are formed in opposite directions to each other. For example, if the first valve is in critical operating condition, the second valve, which is not in the critical operating state, will start up in order not to change the total mass flow which leads into the steam turbine.
  • the critical operating state of the first valve can be bridged quickly and yet a uniform mass flow change can be provided.
  • first accelerometer in the first valve and a second accelerometer in the second valve for detecting the impermissible valve vibrations are arranged.
  • a physical variable is thus determined, which is done by an acceleration sensor. This means that the position of the valve body can be determined and the data is used to diagnose a potentially critical operating condition. If there is such a critical operating state, the operating state of the second valve is checked via an acceleration sensor located in the second valve and the countermeasure according to the invention is taken, which consists in the valve bodies being operated asymmetrically with respect to one another. In other words, the two valves are controlled asymmetrically, so that when a vibration occurs, a valve approaches and the other ascends with the aim to set the desired total mass flow and at the same time to remain as short as possible in the vulnerable operating range of the individual valve.
  • Such a method according to the invention can advantageously be subsequently arranged in existing steam power plants.
  • a programming of the valve control is possible, which leads to a low cost.
  • this downtime is largely avoided.
  • the invention can advantageously be used after steam turbine conversions in a steam power plant or in upgrades of a steam power plant. Because the active monitoring and adaptive avoidance strategy of valve vibrations, damage in the valves can be largely avoided.
  • the first valve and the second valve are opened and closed in such a way that a predetermined total steam mass flow into the steam turbine is achieved.
  • the steam turbine can be operated in spite of undesirable valve vibration in a desired power range.
  • the invention is applicable to steam power plants with more than two valves.
  • the invention is applicable to steam power plants with, for example, three, four or more valves.
  • the valves are operated asymmetrically to one another.
  • a steam turbine arrangement with a steam turbine and a first steam supply and a second steam supply, wherein a first valve in the first steam supply and a second valve in the second steam supply is arranged, wherein a first accelerometer in the first valve and a second accelerometer is arranged in the second valve.
  • the steam turbine arrangement is formed with a control according to the method according to the invention.
  • FIG. 1 shows a part of a steam power plant 1 comprising a steam turbine 2 and a first valve 3 and a second valve 4.
  • the steam turbine 2 is formed with guide and blades not shown and is a first steam supply 5 and a second steam supply 6 with steam from a Steam generator not shown supplied with steam.
  • first valve 3 In the first steam supply 5, the first valve 3 is arranged.
  • second valve 4 In the second steam supply 6, the second valve 4 is arranged.
  • Both the first valve 3 and the second valve 4 comprise a valve body, not shown, which is designed to be movable relative to a valve disk. A movement of the valve body towards the valve plate leads to a closing of the valve. A movement of the valve body away from the valve head leads to a valve opening. An approaching valve will increase the steam mass flow through the valve. A movement of the valve body towards the valve disk leads to a reduction of the steam mass flow.
  • the first valve 3 and the second valve 4 can be made identical. In alternative embodiments, the first valve 3 and the second valve 4 may be formed different from each other.
  • the steam turbine 2 is in the in FIG. 1 illustrated embodiment formed two columns. In alternative embodiments, the steam turbine 2 may be designed to be single-flow.
  • the steam turbine 2 is now operated as follows:
  • a first accelerometer (not shown) disposed in the first valve 3 detects movement of the valve body.
  • a second acceleration sensor (not shown) is arranged in the second valve 4 and designed to detect movements of the valve body. If the first accelerometer or the second accelerometer detects unacceptable valve vibration, the first valve 3 and the second valve 4 are operated asymmetrically with each other. This means that a control intervenes in this case, which causes the first valve 3 to close and the second valve 4 to open.
  • the control is in this case designed such that the first valve 3 and the second valve 4 controls the mass flow in opposite directions to each other. This means that a closing of the one, for example, the first valve 3, leads to an opening of the second valve 4 or vice versa.
  • This asymmetrical regulation of the valve opening is such that, when possible, the desired total mass flow, which is composed of the mass flow through the first valve 3 and the mass flow through the second valve 4, is not changed as much as possible.
  • FIG. 2 shows the mass flow on the Y axis and the time on the X axis.
  • a valve vibration at the second valve 4 is detected.
  • the middle line 9 shows the mass flow through the second valve 4.
  • time t 0 the course of the steam mass flow through the second valve 4 is uniform.
  • valve vibrations are detected, which lead to a supply of the second valve 4.
  • the steam mass flow is now regulated by the first valve 3. This means that at the time t 0, the first valve 3 rises, so that the steam mass flow is increased. This takes place until time t 1 at which the conditions reverse until time t 2 .
  • the first valve 3 is closing, so that the steam mass flow, which is represented by the lower line 10, decreases and the second valve 4 rises, so that the steam mass flow, which is represented by the middle line 9, increases.
  • the valve oscillations have disappeared, so that from the time t 2 the course of the steam mass flows, which are represented by the middle line 9 and the lower line 10, again run smoothly.
  • the upper line 11 shows the steam mass flow flowing through the first valve 3 and through the second valve 4 in total. It can be seen that the steam mass flow represented by the upper line 11 shows no kink, neither at the time t 0 nor at the times t 1 or t 2 . Thus, the total mass flow can flow evenly into the steam turbine 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP13181441.0A 2013-08-23 2013-08-23 Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur Withdrawn EP2840234A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP13181441.0A EP2840234A1 (fr) 2013-08-23 2013-08-23 Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur
JP2016535395A JP2016528437A (ja) 2013-08-23 2014-08-05 ２つの蒸気供給ラインを有する蒸気タービンを運転する方法
EP14752802.0A EP3004566A1 (fr) 2013-08-23 2014-08-05 Procédé pour faire fonctionner une turbine à vapeur comportant deux éléments d'amenée de vapeur
KR1020167004191A KR101834095B1 (ko) 2013-08-23 2014-08-05 두 개의 증기 공급부를 구비한 증기 터빈의 작동 방법
US14/911,838 US20160201500A1 (en) 2013-08-23 2014-08-05 Method for operating a steam turbine with two steam supply lines
PCT/EP2014/066775 WO2015024769A1 (fr) 2013-08-23 2014-08-05 Procédé pour faire fonctionner une turbine à vapeur comportant deux éléments d'amenée de vapeur
RU2016110662A RU2638689C2 (ru) 2013-08-23 2014-08-05 Способ эксплуатации паровой турбины с двумя подводящими паропроводами
CN201480046503.0A CN105492729B (zh) 2013-08-23 2014-08-05 用于运行具有两个蒸汽供给管路的蒸汽轮机的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13181441.0A EP2840234A1 (fr) 2013-08-23 2013-08-23 Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur

Publications (1)

Publication Number Publication Date
EP2840234A1 true EP2840234A1 (fr) 2015-02-25

Family

ID=49084747

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13181441.0A Withdrawn EP2840234A1 (fr) 2013-08-23 2013-08-23 Procédé de fonctionnement d'une turbine à vapeur avec deux conduites d'alimentation de vapeur
EP14752802.0A Withdrawn EP3004566A1 (fr) 2013-08-23 2014-08-05 Procédé pour faire fonctionner une turbine à vapeur comportant deux éléments d'amenée de vapeur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14752802.0A Withdrawn EP3004566A1 (fr) 2013-08-23 2014-08-05 Procédé pour faire fonctionner une turbine à vapeur comportant deux éléments d'amenée de vapeur

Country Status (7)

Country Link
US (1) US20160201500A1 (fr)
EP (2) EP2840234A1 (fr)
JP (1) JP2016528437A (fr)
KR (1) KR101834095B1 (fr)
CN (1) CN105492729B (fr)
RU (1) RU2638689C2 (fr)
WO (1) WO2015024769A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113914941A (zh) * 2021-09-30 2022-01-11 杭州意能电力技术有限公司 抑制大型汽轮发电机组汽流激振的阀序优化方法及系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10626749B2 (en) * 2016-08-31 2020-04-21 General Electric Technology Gmbh Spindle vibration evaluation module for a valve and actuator monitoring system

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US4187685A (en) * 1977-02-18 1980-02-12 Hitachi, Ltd. Method and system for effecting control governing of a steam turbine
JPS60215182A (ja) * 1984-04-06 1985-10-28 Hitachi Ltd 蒸気弁の診断方法
JPH0942211A (ja) * 1995-07-25 1997-02-10 Hitachi Ltd Ｐｗｍ制御弁の制御方法および流体圧エレベーターの制御方法
DE102008015588A1 (de) * 2007-03-29 2008-10-02 General Electric Co. Verfahren und Vorrichtungen zur Überwachung von Dampfturbinenventilanordnungen
US20110056201A1 (en) * 2009-09-08 2011-03-10 General Electric Company Method and apparatus for controlling moisture separator reheaters
EP2503105A2 (fr) * 2011-03-25 2012-09-26 Kabushiki Kaisha Toshiba Dispositif de soupape de vapeur et installation de turbine à vapeur

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JPS58187505A (ja) * 1982-04-27 1983-11-01 Toshiba Corp 蒸気タ−ビンの暖管装置
JPS6153405A (ja) * 1984-08-22 1986-03-17 Toshiba Corp 蒸気タ−ビンの制御装置
US4604028A (en) * 1985-05-08 1986-08-05 General Electric Company Independently actuated control valves for steam turbine
JPH083757B2 (ja) * 1986-11-04 1996-01-17 株式会社東芝 蒸気加減弁の開度制御装置
JPH02125903A (ja) * 1988-11-07 1990-05-14 Toshiba Corp 蒸気加減弁振動診断装置
JP2815894B2 (ja) * 1989-04-19 1998-10-27 株式会社東芝 蒸気タービンノズル浸食防止システム
JPH041401A (ja) * 1990-04-16 1992-01-06 Toshiba Corp 蒸気加減弁振動診断装置
JPH05296001A (ja) * 1992-04-22 1993-11-09 Mitsubishi Heavy Ind Ltd 蒸気管路
JP3638307B2 (ja) * 1994-06-08 2005-04-13 株式会社東芝 原子力発電プラントの再熱蒸気管装置
JPH10184313A (ja) * 1996-12-24 1998-07-14 Hitachi Ltd 蒸気タービン
RU2116464C1 (ru) * 1997-01-24 1998-07-27 Акционерное общество закрытого типа "Энерготех" Разгруженный регулирующий клапан паровой турбины
US20040101396A1 (en) * 2001-09-07 2004-05-27 Heinrich Oeynhausen Method for regulating a steam turbine, and corresponding steam turbine
RU2211338C2 (ru) * 2001-11-12 2003-08-27 Открытое акционерное общество "Ленинградский Металлический завод" Устройство соплового парораспределения цилиндра высокого давления паровой турбины

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187685A (en) * 1977-02-18 1980-02-12 Hitachi, Ltd. Method and system for effecting control governing of a steam turbine
JPS60215182A (ja) * 1984-04-06 1985-10-28 Hitachi Ltd 蒸気弁の診断方法
JPH0942211A (ja) * 1995-07-25 1997-02-10 Hitachi Ltd Ｐｗｍ制御弁の制御方法および流体圧エレベーターの制御方法
DE102008015588A1 (de) * 2007-03-29 2008-10-02 General Electric Co. Verfahren und Vorrichtungen zur Überwachung von Dampfturbinenventilanordnungen
US20110056201A1 (en) * 2009-09-08 2011-03-10 General Electric Company Method and apparatus for controlling moisture separator reheaters
EP2503105A2 (fr) * 2011-03-25 2012-09-26 Kabushiki Kaisha Toshiba Dispositif de soupape de vapeur et installation de turbine à vapeur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113914941A (zh) * 2021-09-30 2022-01-11 杭州意能电力技术有限公司 抑制大型汽轮发电机组汽流激振的阀序优化方法及系统

Also Published As

Publication number Publication date
RU2638689C2 (ru) 2017-12-15
US20160201500A1 (en) 2016-07-14
RU2016110662A (ru) 2017-09-28
KR101834095B1 (ko) 2018-03-02
JP2016528437A (ja) 2016-09-15
WO2015024769A1 (fr) 2015-02-26
CN105492729B (zh) 2017-12-01
CN105492729A (zh) 2016-04-13
KR20160030316A (ko) 2016-03-16
EP3004566A1 (fr) 2016-04-13

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