CN1461374A - Method for regulating steam turbine and corresponding steam turbine - Google Patents
Method for regulating steam turbine and corresponding steam turbine Download PDFInfo
- Publication number
- CN1461374A CN1461374A CN 01815975 CN01815975A CN1461374A CN 1461374 A CN1461374 A CN 1461374A CN 01815975 CN01815975 CN 01815975 CN 01815975 A CN01815975 A CN 01815975A CN 1461374 A CN1461374 A CN 1461374A
- Authority
- CN
- China
- Prior art keywords
- valve
- steam turbine
- steam
- output signal
- control valve
- 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.)
- Granted
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Classifications
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- 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
- F01D17/18—Final actuators arranged in stator parts varying effective number of nozzles or guide conduits, e.g. sequentially operable valves for steam turbines
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- 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
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- 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
- F05D2270/01—Purpose of the control system
- F05D2270/05—Purpose of the control system to affect the output of the engine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention relates to a method for regulating a steam turbine (1), according to which steam is fed to the steam turbine (1) via at least three valves, whereby one of the valves is regulated as a regulating valve (9, 11), and at least two valves are controlled as control valves (13, 15).
Description
The present invention relates to a kind of method that is used for the steam regulation turbo machine, wherein the steam of steam turbine is imported through at least three valves.The invention still further relates to a kind of steam turbine, it has one group of valve that is used for the steam regulation input.
The method of regulating a kind of steam turbine derives from Johannes Dastych and HeinzUnbehauen, the article of Martin Bennauer and Heribert Werthes " the realistic design of the rotating speed of steam turbine and power governor ", ATP 41 (1999), the 5th phase.Steam turbine is regulated by rotating speed and power.Regulating loop by rotating speed shown in Figure 2 and power includes following function block, as speed regulator/power governor (D-/LR), new steam control valve (FD-STV), by modulating valve (AF-STV), steam generator (DE) and turbo machine (T) and the piece that some are basic, for example the constant of input signal, the slope and gear ladder.Turbines to produce electric power, is wherein come the input of steam regulation by a steam generator feeding steam by modulating valve, thereby necessary power is provided.The adjusting of rotating speed and power is undertaken by a common speed regulator/power governor, not only is used to have selectable static load operation, the rotating speed when also being used to regulate zero load.The output signal of speed regulator/power governor acts on the modulating valve that ends of initial steam modulating valve.The modulating valve that a kind of such adjusting requirement of steam turbine has a kind of very complicated adjusting loop and can enough regulate apace.Up to the present all be to use hydraulically powered modulating valve to come the steam regulation air inlet, this be since have only by a kind of such hydraulic driving just may be enough stroke of regulating valve apace.
Known have a kind of adjusting that is used for the valve of steam turbine to drive by WO 98/13633, it has a kind of motor drive unit.Its cost of such motor driving is economical especially, and owing to avoids using hydraulic oil also to reduce the danger of catching fire.A kind of such motor driving of steam valve can be used for the quick closing valve of steam turbine, at this important just quick closedown steam pipework.But motor driving also is not suitable for the adjusting of steam turbine, this be because for the valve of necessity open journey regulate the adjusting time very little, and valve to open the setting of journey too inaccurate.
Task of the present invention is to propose a kind of method that is used for the steam regulation turbo machine, and the cost of this method is economical especially, and has improved operational reliability.Another task of the present invention is a kind of steam turbine with same advantage of explanation.
According to the present invention, task at method solves by the method that a kind of steam regulation turbo machine is described, steam at this steam turbine is imported through at least three valves, and one of them valve is regulated as modulating valve, and has at least two valves to control as control valve.
Thereby just selected an intact brand-brand-new way, when the steam regulation turbo machine, used two kinds of dissimilar valves exactly.The present invention comes from such viewpoint: at the steam regulation turbo machine, never is that all valves all must be designed to modulating valve for effectively, reliably and fast, and the understanding that comes to this usually in the past.After test widely, can prove more precisely, in fact can realize enough reliable and adjusting fast by the assemblying body that modulating valve and control valve are formed to steam turbine.Control valve is determined to a specified value that depends on regulator output signal of its Valve travel.A maintenance that is approximately zero adjusting difference is by one, is also undertaken by a plurality of modulating valve in case of necessity.Thereby have at least two modulating valve to substitute, thereby regulating loop has been simplified widely by a lot of fairly simple control valves.
A) preferred motor driving control valve.Motor driving has very big advantage with a kind of comparing such as electric hydraulic driving on cost.In addition because the danger of having cancelled hydraulic oil thereby having reduced to catch fire.Owing to carry out fine adjustment by means of modulating valve, thereby less adjusting power also just has been suitable for the use in adjustment process when motor driving.
B) preferably use two modulating valve and two control valves.Usually the modulating valve that adopts four valves in adjustment process, work with three control valves according to one of new regulation scheme in principle in steam turbine is just much of that.Yet consider workability preferably, it is favourable adopting two modulating valve and two control valves.
C) when the steam turbine consumed power, preferably design this method like this, thereby modulating valve is at first opened, and when definite one of them value of first control valve of of the regulator output signal that surpasses an adjusting that is applied to modulating valve and when a positive adjusting difference occurring, with regard to unlatching.Further preferably make this first value be roughly 1/4th of maximal regulated device output signal.This positive adjusting difference has been pointed out: the desirable value of power or rotating speed does not reach as yet.
D) in addition preferably when surpassing one second value of regulator output signal, and when a positive adjusting difference occurring, second modulating valve is unlatching just.This of regulator output signal second value is greater than first value of regulator output signal.Thereby when power consumpiton, just reaching another level, just connect the 3rd valve this moment, that is to say second modulating valve.It is peaked about half that second of regulator output signal is worth more preferably regulator output signal.
E) preferably when surpassing the 3rd value of regulator output signal and when having a positive adjusting difference, second control valve is just opened.The 3rd value of regulator output signal is greater than second value of regulator output signal.Thereby when the steam turbine power consumpiton, just having reached another level, this moment, second control valve was connected.At regulator output signal is 100% o'clock, and the complete machine of all valves is opened.
F) preferably regulate the closing velocity of each control valve according to the adjusting extent that occurs separately.This adjusting difference has been pointed out poor between the rating value of the rotating speed of steam turbine and power and actual value, as narrate.If it is big to regulate difference, control valve just moves to its nominal position with a big speed so.If it is less to regulate difference, so less governing speed is just much of that.Especially a frequency variator can be according to regulating the adjusting direction that poor symbol comes the regulation modulating valve for motor driving.
Putting described technological scheme by A to F can be in combination with each other in any way.
Task at steam turbine is a kind of steam turbine of explanation according to solution of the present invention, and it has one and is used for the valve group that steam regulation enters, and this valve group includes a modulating valve and at least two control valves.
A kind of like this advantage of steam turbine is corresponding to the advantage that is used for the method for steam regulation turbo machine recited above.
Preferably make above-mentioned control valve have a kind of motor driven systems.
Below give an example with reference to the accompanying drawings the present invention is narrated in detail.Be depicted as sketch and not to scale (NTS):
Fig. 1 is a steam turbine;
Fig. 2 is a cover steam inlet valve that has attached adjusting circuit;
Fig. 3 is the performance diagram of this steam inlet valve.
Identical label has identical meaning in different figure.
Fig. 1 has schematically illustrated a kind of steam turbine.Steam from steam generator 3 is defeated by steam turbine 1 through intake line 5.5 li of intake lines a valve group 7 is housed.Valve group 7 includes one first modulating valve 9 and one second modulating valve 11.Valve group 7 also includes one first control valve 13 and one second control valve 15.Can regulate the steam flow of importing in the steam turbine 1 by valve group 7.This carries out according to steam turbine 1 desired power and rotating speed.This will describe in detail according to Fig. 2 and 3.
Fig. 2 has represented the valve group 7 with attached adjusting circuit shown in Figure 1.Regulator 21 produces a regulator output signal of indicating an adjusting difference according to the actual value of rotating speed and power and the rating value of rotating speed or power, and this regulator output signal is fed to one first servoamplifier 23 of first modulating valve 9.This regulator output signal also is fed to second servoamplifier 27 of second modulating valve 11.This regulator output signal also is fed to one first frequency variator 25 of first control valve 13.This regulator output signal also is fed to one second frequency variator 29 of second control valve 15.To be described in detail this regulating method according to Fig. 3.
Fig. 3 shows the valve stroke that depends on this regulator output signal of each valve 9,11,13,15 for example with a chart.Recently represent this parameter with peaked percentage separately.Characteristic curve 9K has represented the change curve of first modulating valve 9 according to the valve stroke 33 of regulator output signal 31.Characteristic curve 13K has represented the corresponding characteristic curve of first control valve 13.Characteristic curve 11K has represented the corresponding characteristic curve of second modulating valve 11.Characteristic curve 15K has represented the phase characteristic curve just of second control valve 15.First modulating valve 9 is opened with regulator output signal 31 with being in proportion.First control valve 13 is opened when reaching 22.5% value of regulator output signal 31.When reaching 47.5% value of regulator output signal 31, be the valve stroke 33 that is used for first modulating valve 9, at 100% o'clock the valve stroke 33 that is used for first control valve 13.Lighting second modulating valve by this opens.Final second control valve, 15 connections when 72.5% value.All valves 9,11,13,15 are all opened fully when 100% value of regulator output signal 31.With the 9 realization startings of first modulating valve, with rated speed high loaded process and synchronous operation.Regulate extent and determined the opening speed of control valve 13,15.It is poor just to produce a negative adjusting during unloading.Should negatively regulate the closing velocity that extent has then determined control valve.Because the adjusting power of control valve is less, this valve is motor-driven in the example shown, and the working value for a course of action " is closed " just may be different for modulating valve 9,11 and control valve 13,15 when unloading so.
Claims (9)
1. the method that is used for steam regulation turbo machine (1), wherein the steam of steam turbine (1) is through at least three valves (9,11,13,15) import one of them valve (9,11) regulate as modulating valve, and have at least two valves (13,15) to control as control valve.
2. by the described method of claim 1, wherein control valve (13,15) is motor-driven.
3. by the described method of claim 1, two modulating valve (9,11) and two control valves (13,15) have wherein been used.
4. by the described method of claim 1, wherein for the power consumpiton of steam turbine (1), at first open modulating valve (9,11), and when being applied to modulating valve (9 above one, during definite first value of of the regulator output signal of adjusting 11) (31) and when the positive adjusting difference of one of appearance, one of them just opens control valve (13,15).
5. by claim 4 and 3 described methods, wherein when surpassing one second value of regulator output signal (31) and when the positive adjusting difference of one of appearance, second modulating valve (11) is just opened.
6. by claim 4 and 3 described methods, wherein when surpassing one the 3rd value of regulator output signal (31) and when the positive adjusting difference of one of appearance, second control valve (15) is just opened.
7. by the described method of claim 1, wherein the closing velocity of each control valve (13,15) is all regulated according to the adjusting extent that exists separately.
8. have a steam turbine (1) that is used for the valve group (7) of steam regulation input, its valve group (7) comprises a modulating valve (9,11) and at least two control valves (13,15).
9. by the described steam turbine of claim 8 (1), wherein control valve (13,15) has a motor driven systems.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00120574A EP1191190A1 (en) | 2000-09-20 | 2000-09-20 | Method for regulating a steam turbine and steam turbine |
| EP00120574.9 | 2000-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1461374A true CN1461374A (en) | 2003-12-10 |
| CN100335751C CN100335751C (en) | 2007-09-05 |
Family
ID=8169887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018159753A Expired - Fee Related CN100335751C (en) | 2000-09-20 | 2001-09-07 | Method for regulating steam turbine and corresponding steam turbine |
Country Status (6)
| Country | Link |
|---|---|
| EP (2) | EP1191190A1 (en) |
| JP (1) | JP4695822B2 (en) |
| CN (1) | CN100335751C (en) |
| DE (1) | DE50115502D1 (en) |
| ES (1) | ES2344591T3 (en) |
| WO (1) | WO2002025067A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244203A (en) * | 2013-05-21 | 2013-08-14 | 国家电网公司 | Throttle valve system and working method thereof |
| CN108252752A (en) * | 2017-12-22 | 2018-07-06 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine is into vapour adjusting method |
| CN109356674A (en) * | 2018-12-25 | 2019-02-19 | 大庆特博科技发展有限公司 | A kind of organic working medium turbine of adjustable nozzle quantity |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528446A1 (en) * | 2003-10-29 | 2005-05-04 | Siemens Aktiengesellschaft | Method and controller for positioning an actuator and use of the controller |
| DE102005033292B4 (en) * | 2005-07-16 | 2007-07-26 | I.N.T.-Rickert GmbH Ingenieurbüro für neue Technologien | Device for applying adhesives or sealants |
| JP2013079580A (en) * | 2011-09-30 | 2013-05-02 | Toshiba Corp | Method of operating combined power generating facility and combined power generating facility |
| WO2019217632A1 (en) | 2018-05-09 | 2019-11-14 | Abb Schweiz Ag | Turbine control system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE272691C (en) * | ||||
| NL26523C (en) * | 1926-08-28 | 1900-01-01 | ||
| NL29786C (en) * | 1929-12-30 | 1932-12-15 | ||
| FR787271A (en) * | 1934-06-21 | 1935-09-19 | Rateau Sa | Steam or gas turbine adjustment device |
| US3763894A (en) * | 1971-06-16 | 1973-10-09 | Westinghouse Electric Corp | Sequentially operable control valve for a steam turbine |
| US4245162A (en) * | 1973-08-15 | 1981-01-13 | Westinghouse Electric Corp. | Steam turbine power plant having improved testing method and system for turbine inlet valves associated with downstream inlet valves preferably having feedforward position managed control |
| AU537607B2 (en) * | 1980-12-02 | 1984-07-05 | Hitachi Limited | Combined valve for use in a reheating steam turbine |
| JPS57188705A (en) * | 1981-05-15 | 1982-11-19 | Toshiba Corp | Steam turbine |
| US4604028A (en) * | 1985-05-08 | 1986-08-05 | General Electric Company | Independently actuated control valves for steam turbine |
| JPH0261101U (en) * | 1988-10-26 | 1990-05-07 | ||
| DE19616178C2 (en) * | 1995-07-14 | 1998-07-16 | Ver Energiewerke Ag | Method for loading and unloading the high pressure part of a steam turbine operated with a duo steam boiler block |
| WO1998013633A1 (en) * | 1996-09-26 | 1998-04-02 | Siemens Aktiengesellschaft | Turbine valve actuator |
-
2000
- 2000-09-20 EP EP00120574A patent/EP1191190A1/en not_active Withdrawn
-
2001
- 2001-09-07 EP EP01983470A patent/EP1319117B1/en not_active Expired - Lifetime
- 2001-09-07 CN CNB018159753A patent/CN100335751C/en not_active Expired - Fee Related
- 2001-09-07 JP JP2002529646A patent/JP4695822B2/en not_active Expired - Fee Related
- 2001-09-07 WO PCT/EP2001/010358 patent/WO2002025067A1/en active Application Filing
- 2001-09-07 ES ES01983470T patent/ES2344591T3/en not_active Expired - Lifetime
- 2001-09-07 DE DE50115502T patent/DE50115502D1/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244203A (en) * | 2013-05-21 | 2013-08-14 | 国家电网公司 | Throttle valve system and working method thereof |
| CN103244203B (en) * | 2013-05-21 | 2014-12-03 | 国家电网公司 | Throttle valve system and working method thereof |
| CN108252752A (en) * | 2017-12-22 | 2018-07-06 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine is into vapour adjusting method |
| CN108252752B (en) * | 2017-12-22 | 2020-05-12 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam inlet adjusting method |
| CN109356674A (en) * | 2018-12-25 | 2019-02-19 | 大庆特博科技发展有限公司 | A kind of organic working medium turbine of adjustable nozzle quantity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004518050A (en) | 2004-06-17 |
| EP1319117B1 (en) | 2010-06-02 |
| DE50115502D1 (en) | 2010-07-15 |
| WO2002025067A1 (en) | 2002-03-28 |
| CN100335751C (en) | 2007-09-05 |
| JP4695822B2 (en) | 2011-06-08 |
| EP1319117A1 (en) | 2003-06-18 |
| EP1191190A1 (en) | 2002-03-27 |
| ES2344591T3 (en) | 2010-09-01 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20140907 |
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| EXPY | Termination of patent right or utility model |