EP1165951B1 - Verfahren zur regelung einer dampfturbine mit dampfentnahme, regeleinrichtung für eine dampfturbine mit dampfentnahme und dampfturbine mit dampfentnahme - Google Patents

Verfahren zur regelung einer dampfturbine mit dampfentnahme, regeleinrichtung für eine dampfturbine mit dampfentnahme und dampfturbine mit dampfentnahme Download PDF

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Publication number
EP1165951B1
EP1165951B1 EP00929236A EP00929236A EP1165951B1 EP 1165951 B1 EP1165951 B1 EP 1165951B1 EP 00929236 A EP00929236 A EP 00929236A EP 00929236 A EP00929236 A EP 00929236A EP 1165951 B1 EP1165951 B1 EP 1165951B1
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EP
European Patent Office
Prior art keywords
steam
closed
loop control
steam turbine
parameter
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.)
Expired - Lifetime
Application number
EP00929236A
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German (de)
English (en)
French (fr)
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EP1165951A1 (de
Inventor
Rainer Junk
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Siemens AG
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Siemens AG
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Publication date
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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
    • F01D17/02—Arrangement of sensing elements
    • 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
    • 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

Definitions

  • the invention relates to a method for controlling a Steam turbine with steam extraction.
  • the invention also relates to a control device for such a steam turbine.
  • the steam turbine is a controlled extraction turbine.
  • steam flows in the high pressure part of such a removal turbine.
  • the high pressure part of the steam flows into a steam extraction line and on the other hand in a low pressure part of the Turbine.
  • the steam flowing through the low pressure part can then both a capacitor and another Extraction line are fed.
  • a withdrawal turbine therefore has the task of driving a generator, as well as so-called process steam for operational purposes to provide.
  • the controlled variables can e.g. a withdrawal steam quantity, a power output the turbine, a speed of the turbine shaft, a back pressure in the steam flowing out of the turbine or a pre-pressure of steam flowing into the turbine.
  • An operational task would be e.g. through a regulation according to Extraction steam quantity and the performance are marked.
  • Another Operational task would be, for example, through a regulation labeled according to the amount of steam removed and the back pressure.
  • US Pat. No. 4,146,270 is a control device for a steam turbine with speed and power control coupled on the output side known.
  • the fuzzy controller described is intended to control such a steam turbine enable with steam bypass stations. Nevertheless, a separate control structure has so far been required for each operational task be used. Parameters gained empirically are thereby linked so that the desired control behavior for the operational task follows. Both the parameters and the link the parameter is different from each other, so that different rule structures are used.
  • the object of the invention is to provide a control method a steam turbine with steam extraction, which in simple and the operational tasks of the steam turbine in a reliable manner justice. Furthermore, one should Control device for a steam turbine with Steam extraction can be specified which the operational tasks of the steam turbine in fulfilled in a simple and reliable manner.
  • a sampling valve can also be a supply valve at the same time his.
  • a sampling valve can take steam from a first Stage of the steam turbine can be controlled in that a Supply steam quantity (short supply quantity) for one of the first Stage following second stage of the steam turbine set is that the desired amount of withdrawal steam (short Withdrawal quantity) as the difference between that of the first stage and that of the results in the respective second supply stage.
  • a steam supply or a steam extraction can depend on Required at any point on the steam turbine.
  • the Operational tasks are assigned depending on the desired delivery Power of the turbine or the desired amount of extraction steam characterized by the type of control variables. For example is an operational task by regulating the amount of steam extracted and the speed of the turbine.
  • control signals of the controllers in Control signals for actuators of the supply or removal valve converted. Depending on the operational task, this conversion done in a manner appropriate to the operational task, since everyone A different operational area for the supply or withdrawal valve is based.
  • One of the control variables is preferably an extraction steam quantity, a pressure in the steam turbine, an output of the steam turbine or a speed of the steam turbine.
  • Each operational task is a parameter group that characterizes it assigned for the rule structure.
  • the inverse control structure is inverse the control structure with the parameter group for the second operational task.
  • the start variables are sent to the second controller.
  • the second controller thus starts with values that the last activation of the first controller from the old operating task correspond. This does not result in one sudden change in the control of the actuator.
  • the start variables for the second controller are defined by the use of the common rule structure in simpler Way determined by the fact that the starting variables from the manipulated variables of the first controller using the inverse control structure can be converted.
  • the inverse rule structure corresponds to one Back calculation of the rule structure, taking the rule structure parameters are used for the new operational task. On bumpless switching between operational tasks is in realized in a simple way.
  • Each parameter group preferably comprises a supply valve sub-group and a bleed valve subset, where a first of the control signals with a first parameter and a second of the control signals with a second parameter each of these sub-groups are linked and in addition by means of a respective one assigned to each sub-group Offset parameters the supply valve manipulated variable or the extraction valve manipulated variable be determined.
  • FIG. 1 shows schematically a steam turbine 1.
  • a steam turbine shaft 2 On a Steam turbine shaft 2 are arranged one behind the other a high pressure part 3, a medium pressure part 5 and a low pressure part 7.
  • the steam turbine 1 is connected to a via the steam turbine shaft 2 Generator 8 connected to generate electrical energy.
  • the high-pressure part 3 has a steam supply 9.
  • the medium pressure part 5 has a steam supply 11.
  • the low pressure part 7 has a steam supply 13.
  • the High-pressure part 3 also has a steam extraction 21, via which a withdrawal amount 22 adjustable by a withdrawal valve 25 streams.
  • the medium pressure part 5 has a steam extraction 23 on, through which a removal amount 24 adjustable flows through a sampling valve 27.
  • the low pressure part 7 has a steam extraction 29.
  • the supply valves 15, 17, 19 and the removal valves 25, 27 are with a control device 30 connected.
  • steam flows from a steam generator (not shown) via the steam supply 9, via the supply valve 15, into the high-pressure part 3 , controlled via the supply valve 17, into the medium-pressure part 5.
  • the medium-pressure part 5 can also have a steam supply separate from the high-pressure part 3, that is, for example, a re-feeding of process steam.
  • Steam flows out of the medium-pressure part 5 in a controlled manner via the extraction valve 25 via the steam extraction 23 and / or flows into the low-pressure part 7 via the steam supply 13, controlled via the supply valve 19.
  • the removal valves 25, 27 can also be combined with the supply valves 17, 19. In this case, the extraction steam quantities 22, 24 are controlled indirectly via the supply steam quantities 12, 14.
  • the steam flows from the low-pressure part 7 via the steam extraction 29 off.
  • He can e.g. a not shown Condenser supplied or, like steam from the steam withdrawals 21, 23, for operational purposes.
  • the steam flowing through the steam turbine 1 offsets the Steam turbine shaft 2 in rotation at the speed D. Die Steam turbine 1 gives a power L to the electric generator 8 to generate electrical energy.
  • a pressure PV in the steam Before entry into the steam turbine 1, that is to say approximately in the steam feed 9, there is a pressure PV in the steam.
  • Behind the high pressure part 3 there is a pressure P1 in the steam.
  • Behind the medium pressure part 5 there is a pressure P2 in the steam.
  • Behind the low pressure part 7 there is a pressure P3 in the steam.
  • the pressures P1, P2, P3 can also, if necessary, at another suitable place in the respective Turbine parts 3, 5, 7 are measured.
  • the pressures PV, P1, P2, P3, PN can be used as control variables for controlling the steam turbine 1 be used.
  • Control variables can e.g. also the speed D or the power L.
  • Other controlled variables can e.g. the withdrawal steam amounts 22, 24.
  • the operational Requirements for the steam turbine 1 are e.g. different Extraction steam quantities 22, 24 or different Services L to be discontinued. Accordingly, for one Control of the steam turbine 1 different control variables each according to operational requirements. The use of the Control variables characterize an operational task of the steam turbine 1. This is explained in more detail below.
  • FIG. 2 shows schematically a control device 30.
  • the control device 30 has a first controller 33 and one second controller 35, which together form a pair of controllers 36.
  • the first controller 33 and the second controller 35 are each with a common control structure 37 connected.
  • the rule structure 37 is with a first characteristic curve generator 39 and with a second characteristic generator 41 connected.
  • the first characteristic curve generator 39 is connected to an actuator 43.
  • the second Characteristic curve generator 41 is connected to a second actuator 45.
  • the first actuator 43 is used to actuate a first valve V1.
  • the second actuator 45 is used for actuation of a second valve V2.
  • the valves V1, V2 can each e.g. a supply valve 15, 17, 19 or a removal valve 25.27 for steam.
  • a first controlled variable R1 is fed to the first controller 33.
  • a second controlled variable R2 is fed to the second controller 35.
  • the first controller 33 outputs a first control signal YE to the control structure 37.
  • the second controller 35 outputs a second one Control signal YS to the control structure 37.
  • From the control structure 37 is in accordance with the current operational task a first control signal S1 to the first characteristic curve generator 39 and a second control signal S2 to the second characteristic curve generator 41 issued.
  • the characteristic curve generators 39, 41 control their assigned actuators 43, 45 so that the valves V1, V2 can be set according to the control task.
  • FIGS. 3 to 5 show lists of control structures 37 according to the state of the art.
  • Figure 3 is according to a first Operating task BA a first control signal YE with a second control signal YS using empirically obtained Parameters K1, K2, K3, K4, Y1, Y2, Y3, Y4, KHP, KLP2, KLP1 see above linked that control signals S1, S2, S3 for suitable control valves V1, V2, V3 are output.
  • the figures 4 and 5 show links between the control signals YE, YS according to a different operational task BB, BC.
  • the complex Links using a variety of parameters are difficult to determine. It’s practically impossible a decoupling of the control signals YE, YS over the entire To reach the operating area.
  • FIG. 6 shows a control structure 37 which, for all operational tasks, such as. according to Figures 3 to 5, can be used is.
  • the control structure 37 comprises a parameter set 50.
  • the parameter set 50 is divided into subgroups 51, 53, 55.
  • subset 51 is a supply valve subset and subset 53 is a bleed valve subset.
  • Each sub-group 51, 53, 55 comprises a first parameter AV1, AV2, AV3 and a second parameter BV1, BV2, BV3.
  • each subgroup 51, 53, 55 each includes one Offset parameters CV1, CV2, CV3.
  • the first control signal YE is converted using the second parameters BV1, BV2, BV3.
  • the second control signal YS is based on the first parameters Converted AV1, AV2, AV3.
  • the parameter set 50 is the current operational task adapted and determined so that on the one hand, there is a decoupling of the controlled variables R1, R2 and on the other hand, the operational areas for the operational task are set.
  • FIG. 7 schematically shows a change from a first operating task BA on a second operational task BB.
  • the first operational task BA is carried out in the manner described via the controller pair 36A from the controlled variables R1A and R2A Generation of the control signals YEA and YSA using the control structure 37A converted into control signals S1A, S2A for valves V1, V2 become.
  • control structure 37B characterized.
  • the controller pair 36B, the controlled variables R1B and R2B are supplied.
  • the rule structure 37B are the control signals YEB from the pair of controllers 36B and YSB transmitted.
  • the rule structure 37B becomes this the control signals S1B and S2B derived.
  • Bumpless switching between operational tasks BA, BB is achieved in that the control signals S1A, S2A off the operational task BA using an inverse control structure 37BI can be converted into start signals YES and YSS.
  • the Start signals YES and YSS become the new pair of controllers 36B
  • Operating task BB supplied as start values, so that in the Operational task BB a control with control signals S1B and S2B begins, the last values of the control signals S1A and Correspond to S2A from operational task BA. So it happens no sudden different control of the actuators.
  • the inverse control structure 37BI corresponds to an inversion the control structure 37 with the parameter set 50 of the second operating task BB. With the use of for all operational tasks BA, BB, BC is the same rule structure 37 ensured in a simple manner that a bumpless switching between operational tasks BA, BB, BC.
  • FIG. 8 shows the coupling of one of the controlled variables R1, here a withdrawal steam quantity 22, 24 with a second controlled variable R2, here a power L, according to the prior art.
  • the lines are the same from points Extraction steam amount 22, 24 formed.
  • the on the lines standing numerical values indicate the extraction steam quantity 22, 24 in Kg / s.
  • the axes show the control variables R1, R2 Control signals YE and YS.
  • Figure 9 shows such a coupling diagram below Use of the rule structure 37. Over almost the entire Operating range is the withdrawal steam amount R1, 22, 24 from the Control variable, power L 'associated control signal YS decoupled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP00929236A 1999-03-31 2000-03-24 Verfahren zur regelung einer dampfturbine mit dampfentnahme, regeleinrichtung für eine dampfturbine mit dampfentnahme und dampfturbine mit dampfentnahme Expired - Lifetime EP1165951B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19914626 1999-03-31
DE19914626 1999-03-31
PCT/DE2000/000904 WO2000060227A1 (de) 1999-03-31 2000-03-24 Verfahren zur regelung einer dampfturbine mit dampfentnahme, regeleinrichtung für eine dampfturbine mit dampfentnahme und dampfturbine mit dampfentnahme

Publications (2)

Publication Number Publication Date
EP1165951A1 EP1165951A1 (de) 2002-01-02
EP1165951B1 true EP1165951B1 (de) 2004-02-25

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EP00929236A Expired - Lifetime EP1165951B1 (de) 1999-03-31 2000-03-24 Verfahren zur regelung einer dampfturbine mit dampfentnahme, regeleinrichtung für eine dampfturbine mit dampfentnahme und dampfturbine mit dampfentnahme

Country Status (14)

Country Link
US (1) US6497099B2 (ko)
EP (1) EP1165951B1 (ko)
KR (1) KR100724813B1 (ko)
CN (1) CN1177998C (ko)
AT (1) ATE260405T1 (ko)
AU (1) AU763434C (ko)
BR (1) BR0009508B1 (ko)
CA (1) CA2368959C (ko)
DE (1) DE50005417D1 (ko)
DK (1) DK1165951T3 (ko)
ES (1) ES2216890T3 (ko)
MX (1) MXPA01009721A (ko)
NZ (1) NZ514142A (ko)
WO (1) WO2000060227A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7149591B2 (en) * 2003-10-01 2006-12-12 Cleveland State University Multi-resolution controller
JP4158120B2 (ja) * 2006-05-18 2008-10-01 株式会社日立製作所 蒸気タービンプラント
JP2017129026A (ja) * 2016-01-18 2017-07-27 三菱重工コンプレッサ株式会社 タービン、制御方法及びプログラム

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724214A (en) * 1971-03-05 1973-04-03 Westinghouse Electric Corp Extraction control system for a turbogenerator set
US4053786A (en) * 1973-12-21 1977-10-11 Westinghouse Electric Corporation Transducer out of range protection for a steam turbine generator system
JPS5812443B2 (ja) * 1975-01-31 1983-03-08 株式会社東芝 タ−ビンセイギヨソウチ
US4007595A (en) * 1975-09-30 1977-02-15 Westinghouse Electric Corporation Dual turbine power plant and a reheat steam bypass flow control system for use therein
DE2627591B2 (de) * 1976-06-19 1981-04-16 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Regeleinrichtung für Turbinen mit Drehzahl- und Leistungsregelung
US4357803A (en) * 1980-09-05 1982-11-09 General Electric Company Control system for bypass steam turbines
US5038568A (en) * 1989-11-20 1991-08-13 Pyropower Corporation System for reheat steam temperature control in circulating fluidized bed boilers
DE4435044A1 (de) * 1994-09-30 1996-04-04 Siemens Ag Verfahren zur Last- und Energieverteilung einer Industrieanlage sowie zugehörige Anordnung

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Publication number Publication date
WO2000060227A1 (de) 2000-10-12
ES2216890T3 (es) 2004-11-01
CN1177998C (zh) 2004-12-01
BR0009508A (pt) 2002-02-19
AU4742000A (en) 2000-10-23
CA2368959C (en) 2008-05-13
NZ514142A (en) 2001-09-28
CA2368959A1 (en) 2000-10-12
DE50005417D1 (de) 2004-04-01
KR20020016766A (ko) 2002-03-06
EP1165951A1 (de) 2002-01-02
ATE260405T1 (de) 2004-03-15
MXPA01009721A (es) 2002-08-20
BR0009508B1 (pt) 2008-11-18
AU763434C (en) 2004-05-27
AU763434B2 (en) 2003-07-24
DK1165951T3 (da) 2004-06-14
KR100724813B1 (ko) 2007-06-04
CN1348529A (zh) 2002-05-08
US6497099B2 (en) 2002-12-24
US20020066271A1 (en) 2002-06-06

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