EP1926889A2 - Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe - Google Patents

Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe

Info

Publication number
EP1926889A2
EP1926889A2 EP06793475A EP06793475A EP1926889A2 EP 1926889 A2 EP1926889 A2 EP 1926889A2 EP 06793475 A EP06793475 A EP 06793475A EP 06793475 A EP06793475 A EP 06793475A EP 1926889 A2 EP1926889 A2 EP 1926889A2
Authority
EP
European Patent Office
Prior art keywords
power
plant
maximum power
current
measured
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Withdrawn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
EP06793475A
Other languages
German (de)
English (en)
Inventor
Thorsten Engler
Emil Brütsch
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 EP06793475A priority Critical patent/EP1926889A2/fr
Publication of EP1926889A2 publication Critical patent/EP1926889A2/fr
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the present invention relates to a method for determining the current maximum power of a power plant, in particular a gas turbine plant or a gas and steam turbine plant.
  • the present invention relates strigg a control device for controlling a power plant, in particular a gas turbine plant or a gas and steam turbine plant.
  • the grid operator In a power grid, the grid operator must ensure the balance between the load, ie the requested power, and the power provided. Differences between the load on the one hand and the power available on the other hand lead to a change in the grid frequency, which adversely affects network operation and, in the worst case, can lead to the complete collapse of the grid.
  • control reserve In order to be able to react quickly in the event of sudden imbalances between the load and the available power, the network operators buy in the power generators reserve power, the so-called control reserve.
  • a power plant participating in the control reserve must be able to provide a given power within a certain period of time.
  • a power plant participating, for example, in the so-called minute reserve must be able to provide a certain power after a few minutes (in Germany 15 minutes).
  • Other backup modes require power to be delivered within a few seconds.
  • those control reserves that must be available within seconds are important for the frequency staging operation of the network.
  • a power plant participating in the frequency control operation must be able to quickly provide the agreed reserve power, for example 5% of the maximum power, in the event of a frequency decline.
  • power plant operators must know at all times how large the currently possible maximum power of the power plant is, and adjust the power setpoint of the system on the basis of the maximum power taking into account the reserve power.
  • the maximum output depends above all on the compressor inlet conditions, in particular on the temperature, the humidity and the pressure of the ambient air entering the compressor, as well as on the degree of contamination of the compressor and on the mains frequency.
  • the power setpoint for the current driving style of the power plant then results from the maximum power deductible from the agreed reserve throttle.
  • the maximum power is estimated by the power plant operator and entered the power setpoint manually. If the boundary conditions change, for example the compressor inlet conditions or the degree of contamination of the compressor, the power setpoint must be readjusted manually. The frequency of readjustment depends both on the stability of the compressor entry conditions and on the desired reliability of the control reserve to be maintained.
  • the object of the present invention is to provide a method suitable for automation for determining the current maximum output of a power plant.
  • a further object of the invention is to provide a control device for controlling a power plant on the basis of a guide variable representing a power setpoint.
  • the first object is achieved by a method according to claim 1, the second object by a control device according to claim 12 solved.
  • the third object is achieved by a power plant, in particular a gas turbine plant or a gas and steam turbine plant according to claim 15.
  • the dependent claims contain advantageous embodiments of the invention RETg.
  • the inventive method for determining the current maximum power of a power plant includes the following steps:
  • At least one of the maximum power affecting measurement size In the case of a gas turbine plant or a gas and steam turbine plant, at least one of the following variables can be measured: Compressor inlet temperature of the gas turbine, compressor inlet pressure of the gas turbine, compressor inlet moisture of the gas turbine, the grid frequency or the operating hours since the last cleaning of the compressor (Compressor wash). Determining a conversion quantity from the at least one detected measured variable, which represents the change of the current maximum power relative to a reference power. In this case, the conversion variable can be determined, for example, by means of a power plant model or by means of at least one previously determined conversion curve in which
  • the method according to the invention can replace the estimation of the maximum power of the power plant operator and makes it possible to regulate a power plant on the basis of a performance variable representing a power setpoint.
  • the power setpoint then results from the current maximum power value determined by means of the method according to the invention. plus the required control reserve and possibly further deductible a safety reserve.
  • the method according to the invention therefore enables an automatic tracking of the power setpoint in the event of changes in the boundary conditions.
  • the agreed control reserve can thus be met automatically and precisely. Furthermore, it can be ensured that the power plant can be operated while maintaining this control reserve at maximum power and maximum efficiency.
  • the reference power can be redetermined, whereby in particular the degree of contamination of the compressor can be taken into account when determining the current maximum power.
  • the current gas turbine power and the current value of the at least one measured variable can be measured, for example, in the case of base load conditions, and the reference power can be newly determined on the basis of the power plant model or the at least one conversion curve. Since in the calibration the compressor entry conditions are included as measured variables, and the result of the calibration depends on the state of the contamination of the air inlet filter, the filter contamination in the reference power is taken into account.
  • the conversion quantity can in particular be a conversion factor with which the reference power is to be multiplied.
  • the measured variables are measured continuously or repeatedly and the current maximum power continuously or repeatedly determined.
  • the method according to the invention can be used in particular for determining the current desired power value of a power plant installation, in particular a turbine installation, from the current maximum power of the power plant installation.
  • the current power setpoint is then determined based on the current maximum power determined by the method according to the invention. This can be done in particular continuously or repeatedly.
  • a control device for controlling a
  • the measured variable sensor can be designed, in particular, for measuring one of the following variables: Compressor inlet temperature, compressor inlet pressure, compressor inlet moisture, mains frequency.
  • a conversion unit connected to the at least one measured-quantity sensor for receiving the sensor size and to the memory for receiving the reference power.
  • the conversion unit comprises a power plant model or at least one conversion curve and is designed to convert the reference power into the current maximum power and to output a maximum power representing the maximum power.
  • control device comprises a power setpoint calculation unit which is connected to the conversion unit for receiving the maximum power quantity and which is configured to calculate the power setpoint on the basis of the maximum power size and at least one predetermined control reserve size and for outputting a power setpoint value as a reference variable.
  • the desired power value can be calculated from existing measured variables and automatically updated when the boundary conditions change.
  • the power setpoint calculation unit may in particular be designed to calculate the power setpoint on the basis of the maximum power size, a predetermined control reserve size and a predetermined safety size.
  • the safety size can serve to ensure that the control reserve is reliably maintained. For example, if calibration of the reference maximum power occurs at certain time intervals, the safety margin may serve to absorb shifts in the reference maximum power that occur between two calibrations.
  • the control device may include, for example, a power sensor configured to detect the current power of the power plant and to output a power magnitude representing the current power. Furthermore, in this embodiment there is an updating unit connected to the power sensor for receiving the power quantity, for receiving the sensor size with the at least one measured-size sensor, and for outputting a reference power to the memory. The updating unit is configured to determine the reference power from the received power quantity and the at least one received sensor size.
  • An inventive power plant which may be configured in particular as a gas turbine plant or as a gas and steam turbine plant, is equipped with a control device according to the invention.
  • the power setpoint can automatically be tracked for changes in the boundary conditions.
  • 1 shows the basic structure of a gas and Dampftur- binenkraftmaschines in a much simplified schematic representation.
  • 2 shows the control device according to the invention in one
  • FIG. 3 shows a schematic representation of a control circuit for the gas turbine section of the gas and steam turbine system shown in FIG.
  • the invention will be described below by way of example with reference to the determination of the maximum power of a gas and steam turbine plant.
  • the invention is not limited to use in gas and steam turbine plants. In particular, it can also be used in gas turbine plants without a downstream steam turbine.
  • the gas and steam turbine system 1 shown schematically in FIG. 1 includes a gas turbine plant Ia and a steam turbine plant Ib.
  • the gas turbine plant Ia is equipped with a gas turbine 2, a compressor 4 and at least one combustion chamber 6 connected between the compressor 4 and the gas turbine 2.
  • a gas turbine 2 By means of the compressor 4, fresh air L is sucked in, compressed and fed via the fresh air line 8 to one or more burners of the combustion chamber 6.
  • the supplied air is mixed with liquid or gaseous fuel B supplied via a fuel power 10 and the mixture is subsequently ignited.
  • the resulting combustion exhaust gases form a working medium AM of the gas turbine plant Ia, which is fed to the gas turbine 2, where it performs work under relaxation and drives a shaft 14 coupled to the gas turbine 2.
  • the shaft is coupled with the gas turbine 2 as well as with the compressor 4 and with a generator 12 to drive them.
  • a load transmission may still be present between the compressor 4 and the generator 12. be turned on.
  • the expanded working medium AM ' is discharged via an exhaust pipe 15 to a heat recovery steam generator 30 of the steam turbine plant Ib.
  • the steam turbine installation Ib comprises a steam turbine 32, a condenser 34 and a feedwater pump 36.
  • the waste heat steam generator 30 is connected to the steam turbine 32 via a steam line 31. This is in turn connected to the capacitor 34 via a vapor line 33.
  • a condensate line 35 connects the condenser 34 to the heat recovery steam generator 30.
  • the steam generator 30, the steam turbine 32, the condenser 34, the steam lines 31 and 33 and the condensate line 35 together form a water-steam circuit of the steam turbine plant.
  • the circulation of the condensate or the steam is accomplished by the condensate pump 36. It should be noted at this point that the circuit diagram shown in FIG.
  • the heat recovery steam generator 30 often includes a plurality of evaporators, reheater, preheater, etc. with which the steam can be further heated or the condensate can be preheated.
  • the steam turbine 32 may have a plurality of turbine stages, which are designed for different steam pressures and steam temperatures. These are usually connected in series and increase the efficiency of the steam turbine plant.
  • a control circuit for regulating the power of the gas turbine plant Ia of the combined cycle power plant 1 is shown schematically in FIG 2 as a block diagram.
  • the control circuit is used in the present example for acting on the combustion chamber 6 supplied air mass flow and / or the combustion chamber 6 supplied fuel mass flow.
  • Fuel supply therefore form the controlled system 56 of the control loop 50.
  • an actuator 54 is present, which control signals for a Brenn- Outputs the fuel supply valve and for the vanes of the first compressor guide row or rows.
  • disturbances z which act on the controlled system 56, also lead to changes in the gas turbine power.
  • a power sensor 58 By means of a power sensor 58, the current power P of the gas turbine is measured and output in the form of a power quantity. The power quantity is subtracted from a power setpoint W in a subtracter 60, and the difference is forwarded to the controller 52.
  • This determines a control signal REG which is output to the actuator 54 and this causes to act by means of a manipulated variable U on the control system 56 such that the current power value is equalized to the power setpoint W.
  • the power setpoint W should take into account the control reserve, i. it must be smaller than the maximum power of the gas turbine plant. It is calculated from the currently possible maximum power according to the formula
  • R denotes the required control reserve (in percent)
  • S a security (also in percent) which serves to be able to comply with the required control reserve with the greatest possible certainty.
  • the currently possible maximum power P max also enters this formula.
  • this maximum power is not a constant quantity, but depends on boundary conditions.
  • boundary conditions X 1 are in particular compressor inlet conditions such as the temperature, humidity and pressure of entering the compressor 4 air L.
  • the achievable maximum power from the degree of contamination of the compressor 4, the degree of contamination of the air intake filter, the aging of the power plant components, the Mains frequency, etc. influenced. Based on what has been said, the knowledge of the current maximum power P max is necessary if the desired power value Psoii is to be determined.
  • the block diagram shows a device for determining the desired power value, which enters into the control circuit 50 shown in FIG.
  • the device 70 includes a number of measurement size sensors, shown as block 72.
  • Measured variable sensors can be, for example, sensors which determine the compressor inlet temperature, the compressor inlet humidity, the compressor inlet pressure of the ambient air, the mains frequency, etc.
  • the device 70 includes as a further sensor, a power sensor 73, with which the current gas turbine power can be detected.
  • the device 70 further comprises a calculation unit 74, which includes a gas turbine model and outputs a conversion factor f (X 1 ), a memory 75, in which a reference power P re f is stored, and a multiplication unit 76, which is connected to the memory 75 for Receiving the reference power P re f and with the calculation unit 74 for receiving the conversion factor f (X 1 ) is connected.
  • the multiplication unit 76 is designed to calculate the maximum power by multiplying the reference power P ref by the conversion factor f (X 1 ) and outputting the value of the maximum power P max .
  • the device 70 comprises a power setpoint calculation unit 78 and two memories or memory locations 80, 82 in which the value R for the control reserve or the value S for the safety are stored.
  • the device 70 may include an offset memory 84, in which offset values are stored for the measured variables X 1 measured by the measured-quantity sensors 72. These offsets can be added to the determined measured quantities X 1 before these are entered into the calculation unit 74.
  • the device 70 includes one with the calculation unit 74 for receiving the conversion factor f (X 1 ) and the reference power calculation unit 86 connected to the memory 75 for outputting the reference power P re f and a triggering unit 88 connected to the memory 75 for triggering a memory operation in the memory 75.
  • Determining the desired power value P so ii with the device 70 shown in FIG. 3 is carried out by passing the measured variables X 1 detected by the measured variable sensors 72 to the computing unit 74, which contains a model of the gas turbine plant and using the acquired measured variables the conversion factor f (X 1 ) calculated.
  • offsets can be added to the acquired measured variables before the measured variables X 1 are entered into the calculation unit 74.
  • the conversion factor is forwarded to the multiplication unit 76, where it is multiplied by a reference power P re f related to the memory 75.
  • the product of the reference power P re f and the conversion factor f (X 1 ) provides the maximum possible power P max of the gas turbine plant.
  • the calculation unit 74 and the multiplication unit 76 together form a conversion unit which converts the reference power P re f into the current maximum power P max on the basis of the measured values X 1 .
  • the wristsollwert- calculation unit 78 of the power reference value P is then calculated as II according to formula 1 from the maximum power P max, the required control reserve R and safety S and passed on as a reference variable at the positions shown in FIG 2 loop 50th
  • a calibration is also performed at regular intervals.
  • a new reference power P re f is calculated and stored in the memory 75. Calibration is possible, for example, during base load conditions of the gas turbine plant.
  • the current gas turbine power is detected by means of the power sensor 73 and forwarded to the reference power calculation unit 86. It also receives from the calculation unit 74 the current conversion factor f (X 1 ).
  • the reference power P ref then results from the quotient of the measured power, hereinafter referred to as P ka i, and the conversion factor determined on the basis of the measured variables X 1 measured simultaneously, referred to hereinafter as f ka i (X 1 ).
  • the new reference power Pr e f thus determined is then stored in the memory 75 as a new, ie calibrated, reference power and is subsequently available to the conversion unit 76 as a reference power P rer .
  • Calibration takes place when the system is started up and afterwards at regular intervals. Used to initiate the storing of the new reference power a trip unit 88.
  • the calculation unit 74, the reference power calculating unit 86 and the trip unit 88 together form an updating unit for updating or calibrating the reference power P re f.
  • a model of the power plant was used in the calculation unit 74.
  • conversion curves which represent a relationship Ji 1 for each detected measured variable X 1 .
  • the conversion factor f (X 1 ) then results from the product of the individual factors Ji 1 . For example, if there is ever a factor for the compressor inlet temperature (factor f ⁇ v ), for the compressor inlet pressure (fp V ), the compressor inlet temperature (f v ) and for the mains frequency (f N ), the conversion factor results to

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Feedback Control In General (AREA)
  • Control Of Turbines (AREA)

Abstract

L'invention concerne un procédé pour déterminer la puissance maximale (Pmax) réelle d'une centrale électrique, en particulier d'une à turbine à gaz ou une usine à turbine à vapeur et à gaz, ledit procédé comprenant les étapes suivantes : détermination d'au moins d'une valeur de mesure (xi) influençant la puissance maximale (Pmax) ; détermination d'une grandeur de calcul (f(xi)) à partir d'au moins une valeur de mesure (xi) déterminée, laquelle représente la modification de la puissance maximale (Pmax) réelle en fonction de la puissance référence (Pref) ; calcul de la puissance de référence (Pref) dans la puissance maximale (Pmax) réelle à l'aide de la grandeur de calcul (f(xi)).
EP06793475A 2005-09-16 2006-09-13 Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe Withdrawn EP1926889A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06793475A EP1926889A2 (fr) 2005-09-16 2006-09-13 Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05020252A EP1764486A1 (fr) 2005-09-16 2005-09-16 Procédé pour déterminer la charge de pointe actuelle d'une centrale et système de regulation
EP06793475A EP1926889A2 (fr) 2005-09-16 2006-09-13 Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe
PCT/EP2006/066312 WO2007031535A2 (fr) 2005-09-16 2006-09-13 Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe

Publications (1)

Publication Number Publication Date
EP1926889A2 true EP1926889A2 (fr) 2008-06-04

Family

ID=35840712

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05020252A Withdrawn EP1764486A1 (fr) 2005-09-16 2005-09-16 Procédé pour déterminer la charge de pointe actuelle d'une centrale et système de regulation
EP06793475A Withdrawn EP1926889A2 (fr) 2005-09-16 2006-09-13 Procede pour determiner la puissance maximale reelle d'une centrale electrique et dispositif de reglage associe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05020252A Withdrawn EP1764486A1 (fr) 2005-09-16 2005-09-16 Procédé pour déterminer la charge de pointe actuelle d'une centrale et système de regulation

Country Status (3)

Country Link
EP (2) EP1764486A1 (fr)
CN (1) CN101268252B (fr)
WO (1) WO2007031535A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH699324A1 (de) * 2008-08-14 2010-02-15 Alstom Technology Ltd Verfahren zur bewertung der maximalen stromerzeugungskapazität und zum regeln einer spezifizierten leistungsreserve eines gasturbinenkraftwerks oder eines gas/dampf-kombikraftwerks und stromerzeugungssystem zur verwendung des verfahrens.
WO2009156299A2 (fr) 2008-06-26 2009-12-30 Alstom Technology Ltd Procédé d'estimation de la capacité de production d'énergie maximum et de gestion d'une réserve d'énergie spécifiée pour centrale énergétique à turbine à gaz à cycle simple ou combinée et système de production d'énergie s'utilisant avec ce procédé
ITMI20101428A1 (it) * 2010-07-29 2012-01-30 Ansaldo Energia Spa Metodo per la gestione del margine di riserva primaria in un impianto per la produzione di energia elettrica e impianto per la produzione di energia elettrica
EP3012420A1 (fr) * 2014-10-24 2016-04-27 Siemens Aktiengesellschaft Procédé de synchronisation d'une turbine au réseau électrique

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Publication number Priority date Publication date Assignee Title
GB1037346A (en) * 1962-04-23 1966-07-27 Gen Electric A steam turbine system
JPS59122712A (ja) * 1982-12-28 1984-07-16 Toshiba Corp 複合サイクル発電プラントの負荷制御装置
US5388411A (en) * 1992-09-11 1995-02-14 General Electric Company Method of controlling seal steam source in a combined steam and gas turbine system
RU2169272C2 (ru) * 1996-03-07 2001-06-20 Сименс Акциенгезелльшафт Способ и устройство для быстрого регулирования мощности энергетической установки
DE19943614C1 (de) * 1999-09-11 2000-10-19 Bosch Gmbh Robert Verfahren zur Lastregelung bei einer Wärmekraftmaschine mit Stromgenerator
DE10212457A1 (de) * 2002-03-20 2003-10-02 Bbp Energy Gmbh Verfahren und Anordnung zur Ermittlung einer Dampfmenge

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Title
See references of WO2007031535A3 *

Also Published As

Publication number Publication date
EP1764486A1 (fr) 2007-03-21
WO2007031535A2 (fr) 2007-03-22
CN101268252A (zh) 2008-09-17
WO2007031535A3 (fr) 2007-09-07
CN101268252B (zh) 2011-04-06

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