EP2655811A2 - Verfahren zur regelung einer kurzfristigen leistungserhöhung einer dampfturbine - Google Patents
Verfahren zur regelung einer kurzfristigen leistungserhöhung einer dampfturbineInfo
- Publication number
- EP2655811A2 EP2655811A2 EP12705819.6A EP12705819A EP2655811A2 EP 2655811 A2 EP2655811 A2 EP 2655811A2 EP 12705819 A EP12705819 A EP 12705819A EP 2655811 A2 EP2655811 A2 EP 2655811A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fossil
- steam generator
- power
- steam
- flow
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 title abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 230000009467 reduction Effects 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 2
- 230000001771 impaired effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 16
- 239000007924 injection Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000008901 benefit Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/06—Control systems for steam boilers for steam boilers of forced-flow type
- F22B35/10—Control systems for steam boilers for steam boilers of forced-flow type of once-through type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/003—Emergency feed-water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/02—Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
Definitions
- the invention relates to a method for controlling a short-term increase in output of a steam turbine with an upstream fossil-fueled continuous steam generator with a number of a flow path-forming, flowed through by a flow medium economizer, evaporator and Matterhitzersammlung surfaces.
- a fossil-fueled steam generator produces superheated steam using the heat generated by burning fossil fuels.
- Fossil fueled steam generators are mostly used in steam power plants, which are mainly used for power generation.
- the generated steam is fed to a steam turbine.
- the fossil-fueled steam generator also comprises a plurality of pressure stages with different thermal states of the respectively contained water-steam mixture.
- the first (high) pressure level the flow medium passing through the flow path on its first economiser, to use the residual heat Voricar ⁇ mung of the flow medium, and then various levels of dene ⁇ evaporator and superheater.
- the evaporator the flow medium is evaporated, then separated any residual moisture in a separator and further heated the remaining steam in the superheater. Thereafter, the superheated steam in the high pressure part of the steam turbine flows, is there decompressed, and the following print ⁇ stage of the steam generator is supplied. There he is again supplied via ⁇ hitzt (reheat) and the next-pressure part of the steam turbine.
- the heat output transferred to the superheaters can fluctuate greatly. There- It is often necessary to control the overheating temperature. Usually, this is usually achieved by an injection of feed water before or after individual superheater heating surfaces for cooling, ie, an overflow branch branches off from the main flow of the flow medium and leads to injection coolers arranged accordingly there.
- the injection is customarily controlled by a predetermined for the Tempe ⁇ raturabweichungen by a temperature setpoint at the outlet of the superheater characteristic parameter value with the aid of valves.
- Such power changes of a power plant block in the se ⁇ customer area are possible only by a coordinated interaction of steam generator and steam turbine.
- the contribution of fossil fuel-fired steam generator can do this is by using his memory, ie the steam but also the fuel storage, as well as rapid changes in the controlling variable ⁇ SEN feedwater, injection water, fuel and air.
- This measure an increase in performance is achieved within a few seconds. This additional power can be released in a relatively short time, so that the delayed power increase can be at least partially compensated by the increase in the firing capacity.
- the entire block makes by this measure immediately a jump in performance and can also permanently maintain or exceed this level of performance by a subsequent increase in the firing capacity, ⁇ the system was set at the time of additional requested power reserves in the partial load range.
- a permanent throttling of the turbine valves for Vorhal ⁇ tion of a reserve however, always leads to a loss ⁇ efficiency, so that for an economical driving the degree of throttling should be kept as low as absolutely necessary.
- some types of fossil-fueled steam generators such. B. forced flow steam generator may have a significantly smaller storage volume than z. B. natural circulation steam generator.
- the difference in the size of the memory has an influence on the behavior of changes in the power plant block in the method described above.
- the design pressure in the entire steam generator must not be exceeded, so that this measure in the upper load range only limited or can not be applied.
- This object is achieved according to the invention, by increasing the short-term ⁇ power increase of the steam turbine, the flow of fluid medium through the fossil-fired steam generator.
- the invention is based on the consideration that the introduced heat output into the steam generator is determined by the firing capacity and only has a comparatively slow effect in the event of a sudden change.
- a zusiger ⁇ Liche power delivery in the steam turbine should be performed by a use of the stored in the heating surfaces of the steam generator heat energy. The withdrawal of this heat requires a lowering of the average material temperature. This should be achieved by increasing the flow, ie the amount of flow medium flowing through per unit of time. Due to the higher flow with comparatively lower medium temperatures, the average material temperature of all heating surfaces is lowered by this measure and as a result thermal energy is released from all these heating surfaces and released in the steam turbine in the form of additional power.
- the enthalpy desired value is reduced at the exit of an evaporator heating surface .
- the setpoint value for the specific enthalpy is used in the control system of the Dampferzeu ⁇ gers as a control variable for the determination of the desired value for the flow of the flow medium.
- This switching action has two effects: First, the basic setpoint for the evaporator flow rate calculated in the feedwater setpoint determination increases. Second, the increased Enthalpiekor ⁇ rekturregler - especially when the reduction particularly rapidly (suddenly) is carried out - by now larger anste ⁇ rising control deviation to be output to rapidly as possible to reduce the enthalpy at the evaporator outlet. As a result, the amount of feed water at the beginning of this measure even increases disproportionately and it is a particularly fast storage of heat from the heating surfaces with the associated glossentitati in the steam turbine possible.
- the enthalpy desired value is reduced to a given minimum enthalpy value . This is a ⁇ hand in all load conditions, a maximum tripodentbin- while maintaining operational safety.
- the Swiss-Shenthalpiewert is dimensioned such that in all load conditions of the fossil-fueled steam generator complete Verdamp ⁇ tion of the flow medium is achieved in the evaporator heating.
- Verdamp ⁇ tion of the flow medium is achieved in the evaporator heating.
- subcritical operation namely, should be ensured that the enthalpy at the evaporator ⁇ outlet is not lowered too far and consequently a seizure of residual water in a downstream separator can be safely avoided.
- a maximum increase in additional feed water and thus additional performance relief should be achieved with the safest possible driving.
- the parameters of the measures taken are matched to the required power release in the steam turbine and optimized. For this amount and / or duration of the reduction of Enthalpiesollwerts be determined from the Need Beer ⁇ saturated power increase.
- flow medium removed in the flow path in the region of a superheater heating surface of the steam generator is injected for short-term increase in output of the steam turbine.
- Derar ⁇ term injections can in fact make a further contribution to the short-term rapid change in performance.
- the stored thermal energy is used for ei ⁇ ne temporary increase in power of the steam turbine. This thus results in the additional advantage that a particularly high excess power can be maintained at a constant level over a geeig ⁇ designated coordinating all measures available quickly and as long as possible.
- the material load can also be positively influenced.
- the heat input is increased in the fossil-fired steam generator, that is, increases the firing capacity of the burner.
- a temperature reduction at the evaporator outlet can be favorably influenced or even completely avoided by the described method, since the measure acts as a Vorhaltsignal on the Spei ⁇ sewasser.
- the method not only allows a short-term increase in performance, but is also used for faster adjustment of a longer-term performance increase.
- a control system for a fossil-fired steam generator with a number of flow-forming, flowed through by a flow medium economizer, evaporator and Kochhitzersammlungflä- chen means for carrying out the method.
- a fossil-fired steam generator for a steam power plant comprises such a control system and a steam power plant such a fossil-fired steam generator.
- FIG. 1 shows a diagram with simulation results for improving the instantaneous reserve of a fossil-fired continuous steam generator by increasing the feedwater quantity together with injection of high-pressure steam, reheat steam and in each case in both pressure systems in an upper load range, and
- FIG. 2 shows a diagram with simulation results for improving the immediate reserve of a fossil-fueled continuous steam generator by increasing the amount of feed water together with injection of high-pressure steam, reheat steam and in each case in both pressure systems in a lower load range.
- FIG 1 is a diagram showing simulation results by taking advantage of the control method in a fossil-fired steam generator, ie a sudden reduction in the contained ⁇ piesollwerts at the evaporator outlet to increase the feed water flow at constant ⁇ firing.
- Up ⁇ carry the percent additional power is related to full load 1 against time in seconds after a 2 sprunghaf ⁇ th reduction of the target value of the specific enthalpy at the evaporator outlet to 100 kJ / kg at 95% load.
- This reduction tion provides the control concept for an increase in Lucaswas ⁇ ser diehne.
- Curve 4 shows the result without ⁇ additional use of injections
- curves 6 and 8 represent the results for an additional use of injections in the high pressure stage or in the high-pressure and medium-pressure stage.
- additional cure ⁇ ventool 10 shown 12, 14, which results in high pressure stage without raised stabili ⁇ hung the supply amount of water, but by sole use of injections (curve 10), medium-pressure stage (curve 12) and two pressure stages (curve 14 ) demonstrate.
- the injection is achieved by reducing the setpoint for live steam temperature and, if appropriate, reheaction temperature by 20 K.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Control Of Turbines (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12705819T PL2655811T3 (pl) | 2011-02-25 | 2012-02-10 | Sposób regulacji krótkookresowego wzrostu mocy turbiny parowej |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011004712 | 2011-02-25 | ||
PCT/EP2012/052312 WO2012113662A2 (de) | 2011-02-25 | 2012-02-10 | Verfahren zur regelung einer kurzfristigen leistungserhöhung einer dampfturbine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2655811A2 true EP2655811A2 (de) | 2013-10-30 |
EP2655811B1 EP2655811B1 (de) | 2015-10-14 |
Family
ID=45757393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12705819.6A Active EP2655811B1 (de) | 2011-02-25 | 2012-02-10 | Verfahren zur regelung einer kurzfristigen leistungserhöhung einer dampfturbine |
Country Status (8)
Country | Link |
---|---|
US (1) | US9080467B2 (de) |
EP (1) | EP2655811B1 (de) |
JP (1) | JP5815753B2 (de) |
KR (1) | KR101818090B1 (de) |
CN (1) | CN103492678B (de) |
DK (1) | DK2655811T3 (de) |
PL (1) | PL2655811T3 (de) |
WO (1) | WO2012113662A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016218763A1 (de) | 2016-09-28 | 2018-03-29 | Siemens Aktiengesellschaft | Verfahren zur kurzfristigen Leistungsanpassung einer Dampfturbine eines Gas-und Dampfkraftwerks für die Primärregelung |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4933002A (de) | 1972-08-04 | 1974-03-26 | ||
FR2401380A1 (fr) | 1977-08-23 | 1979-03-23 | Sulzer Ag | Generateur de vapeur a circulation forcee |
DE3863153D1 (de) | 1987-09-21 | 1991-07-11 | Siemens Ag | Verfahren zum betreiben eines durchlaufdampferzeugers. |
DE4117796A1 (de) * | 1991-05-30 | 1993-01-21 | Ver Energiewerke Ag | Verfahren zur dampftemperaturregelung an ueberhitzern von dampfanlagen |
JP2563099B2 (ja) * | 1992-05-04 | 1996-12-11 | シーメンス アクチエンゲゼルシヤフト | 強制貫流蒸気発生器 |
DE19749452C2 (de) * | 1997-11-10 | 2001-03-15 | Siemens Ag | Dampfkraftanlage |
DE19750125A1 (de) | 1997-11-13 | 1999-03-11 | Siemens Ag | Verfahren und Vorrichtung zur Primärregelung eines Dampfkraftwerkblocks |
US6230480B1 (en) * | 1998-08-31 | 2001-05-15 | Rollins, Iii William Scott | High power density combined cycle power plant |
US6766646B1 (en) * | 2003-11-19 | 2004-07-27 | General Electric Company | Rapid power producing system and method for steam turbine |
US7690201B2 (en) * | 2005-11-07 | 2010-04-06 | Veritask Energy Systems, Inc. | Method of efficiency and emissions performance improvement for the simple steam cycle |
EP2194320A1 (de) * | 2008-06-12 | 2010-06-09 | Siemens Aktiengesellschaft | Verfahren zum Betreiben eines Durchlaufdampferzeugers sowie Zwangdurchlaufdampferzeuger |
DE102010041964A1 (de) | 2010-10-05 | 2012-04-05 | Siemens Aktiengesellschaft | Verfahren zur Regelung einer kurzfristigen Leistungserhöhung einer Dampfturbine |
US9091182B2 (en) * | 2010-12-20 | 2015-07-28 | Invensys Systems, Inc. | Feedwater heater control system for improved rankine cycle power plant efficiency |
US9316122B2 (en) * | 2010-12-20 | 2016-04-19 | Invensys Systems, Inc. | Feedwater heater control system for improved Rankine cycle power plant efficiency |
-
2012
- 2012-02-10 PL PL12705819T patent/PL2655811T3/pl unknown
- 2012-02-10 KR KR1020137022263A patent/KR101818090B1/ko active IP Right Grant
- 2012-02-10 CN CN201280019457.6A patent/CN103492678B/zh active Active
- 2012-02-10 JP JP2013554845A patent/JP5815753B2/ja not_active Expired - Fee Related
- 2012-02-10 EP EP12705819.6A patent/EP2655811B1/de active Active
- 2012-02-10 WO PCT/EP2012/052312 patent/WO2012113662A2/de active Application Filing
- 2012-02-10 DK DK12705819.6T patent/DK2655811T3/en active
- 2012-02-10 US US14/001,281 patent/US9080467B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012113662A2 * |
Also Published As
Publication number | Publication date |
---|---|
CN103492678A (zh) | 2014-01-01 |
US20130327043A1 (en) | 2013-12-12 |
KR20140007857A (ko) | 2014-01-20 |
JP5815753B2 (ja) | 2015-11-17 |
DK2655811T3 (en) | 2016-01-11 |
EP2655811B1 (de) | 2015-10-14 |
PL2655811T3 (pl) | 2016-03-31 |
CN103492678B (zh) | 2016-03-09 |
US9080467B2 (en) | 2015-07-14 |
AU2012219798A1 (en) | 2013-08-29 |
WO2012113662A3 (de) | 2013-03-21 |
JP2014508272A (ja) | 2014-04-03 |
WO2012113662A2 (de) | 2012-08-30 |
KR101818090B1 (ko) | 2018-01-12 |
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