WO2009016665A1 - Device and method for regulating the exhaust temperature of a gas turbine - Google Patents
Device and method for regulating the exhaust temperature of a gas turbine Download PDFInfo
- Publication number
- WO2009016665A1 WO2009016665A1 PCT/IT2007/000556 IT2007000556W WO2009016665A1 WO 2009016665 A1 WO2009016665 A1 WO 2009016665A1 IT 2007000556 W IT2007000556 W IT 2007000556W WO 2009016665 A1 WO2009016665 A1 WO 2009016665A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- igv
- plant
- basis
- controlling
- reference values
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/26—Controlling the air flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
- F02C9/28—Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/48—Control of fuel supply conjointly with another control of the plant
- F02C9/50—Control of fuel supply conjointly with another control of the plant with control of working fluid flow
- F02C9/54—Control of fuel supply conjointly with another control of the plant with control of working fluid flow by throttling the working fluid, by adjusting vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/08—Regulating air supply or draught by power-assisted systems
- F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
-
- 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
- F05D2270/08—Purpose of the control system to produce clean exhaust gases
- F05D2270/083—Purpose of the control system to produce clean exhaust gases by monitoring combustion conditions
- F05D2270/0831—Purpose of the control system to produce clean exhaust gases by monitoring combustion conditions indirectly, at the exhaust
-
- 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
- F05D2270/303—Temperature
-
- 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
- F05D2270/309—Rate of change of parameters
-
- 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
- F05D2270/70—Type of control algorithm
- F05D2270/708—Type of control algorithm with comparison tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/02—Air or combustion gas valves or dampers
- F23N2235/06—Air or combustion gas valves or dampers at the air intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/20—Gas turbines
Definitions
- the present invention relates to a gas turbine plant control device and method.
- Figure 1 shows a block diagram of a gas turbine plant comprising the control device according to the present invention
- FIG. 2 shows a block diagram of the control device according to the present invention
- Figure 3 shows a graph of a control function of the Figure 2 control device
- Figure 4 shows a graph of the exhaust temperature of the Figure 1 gas turbine in relation to power output percentage .
- FIG. 1 indicates a gas turbine electric power plant.
- Plant 1 substantially comprises a turbine assembly 3 ; a generator 4 which converts the mechanical power produced by turbine assembly 3 to active electric power - hereinafter referred to simply as power output P; a control device 5; a pickup module 6; and an actuator 7.
- Turbine assembly 3 comprises a compressor 9, a combustion chamber 10, and a gas turbine 11. More specifically, compressor 9 comprises a variable-geometry inlet stage 14, in turn comprising an array of adjustable vanes or so-called IGVs (Inlet Guide Vanes) (not shown for the sake of simplicity) which can be tilt-adjusted by actuator 7 to regulate air intake by compressor 9.
- IGVs Inlet Guide Vanes
- Pickup module 6 comprises a number of sensors (not shown for the sake of simplicity) for detecting a number of plant 1 parameters, which are then supplied to control device 5. More specifically, pickup module 6 detects the exhaust gas temperature or so-called exhaust temperature T 3 of turbine 11; electric power output P or so-called load; the position IGV PO s of the adjustable vanes of inlet stage 14 of compressor 9; and fuel flow
- Control device 5 substantially comprises a first control module 18 for controlling exhaust temperature T 3 ; a reference value selection module 19 which supplies first control module 18 with exhaust temperature reference values T SRIF ; and a second control module 20 which operates during fuel transients, i.e. variations in fuei flow Q F , to supply first control module 18 with a control signal U c .
- reference value section module 19 comprises a fixed reference module 22, a variable reference module 23, and a selector module 24.
- Fixed reference module 22 supplies a constant exhaust temperature reference value T SRIFC / usually defined beforehand, which does not vary alongside variations in the other parameters of plant 1, and which preferably can only be modified by a trained technician.
- Variable reference module 23 receives the position IGVp 0S of the adjustable vanes of compressor 9, and supplies a variable exhaust temperature reference value TsRiFv which varies as a function of the position IGV PO s of the adjustable vanes, and therefore indirectly as a function of power output P of plant 1.
- variable reference module 23 comprises a first computing module 25 and a second computing module 26.
- First computing module 25 receives a position IGV PO s of the adjustable vanes, and supplies an exhaust temperature reference value T S RIF VO calculated on the basis of a function F(IGV PO s) defined beforehand and which varies according to the type of plant. For each position IGV PO s of the adjustable IGVs, first computing module 25 supplies a reference value T SRIFV o, T S RIFVI» T S RIFV2
- function F(IGV PO s) varies according to the type of burner used in gas turbine plant 1.
- number 50 in Figure 3 shows a function F(IGV PO s) of a plant equipped with an ecological burner, e.g. of the type described in Patent Application EP 1710502 filed by Ansaldo Energia S.p.A..
- Number 51 indicates a function F(IGV PO s) of a plant equipped with a conventional burner.
- First computing module 25 preferably contains a function F(IGV PO s) library covering most currently marketed gas turbine plant burners .
- Second computing module 26 receives and memorizes the reference value T SRIFVI calculated by first computing module 25, and supplies a reference value T SRIFV , which has a ramp time pattern between the last memorized reference value T S RIF VO and the received reference value TsRiFvi/ to avoid sudden changes in reference value T SRIFV , and to slow down the variation in reference value T SR I FV with respect to the variation in the position of the IGVs.
- the constant reference value T SRIFC and variable reference value T SR i FV are supplied to selector module 24, which, on the basis of predetermined, preferably operator-entered settings, selects from constant and variable reference values T S RIFC and T S RIFV a reference value T 3R i F for supply to first control module 18.
- First control module 18 receives a measured exhaust temperature value T 3 from pickup module 6, and a reference value T 3RIF from reference value selection module 19, and supplies actuator 7 with a drive signal Ui G v to adjust the position of the IGVs of compressor 9. More specifically, first control module 18 comprises an error computing module 27, which calculates a temperature error e ⁇ , i.e.
- drive module 28 which transmits drive signal U IGV to actuator 7 on the basis of temperature error e ⁇ .
- drive module 28 generates drive signal U IGV using PID (proportional-integral-derivative) control logic.
- Second control module 20 receives plant 1 power output value P and fuel flow value Q F from pickup module 6, and, during fuel transients, supplies first control module 18 - in particular, drive module 28 - with a control signal U c , correlated with the power gradient ⁇ P/ ⁇ t, to modify drive signal U IGV -
- second control module 20 comprises a computing module 29, a library module 30, and an analysis module 31.
- Computing module 29 receives and memorizes power output value P, and calculates its gradient ⁇ P/ ⁇ t for supply to analysis module 31, and also receives and memorizes fuel flow value Q F , and calculates the variation in fuel flow ⁇ Q F for supply to analysis module 31.
- Library module 30 comprises a number of control signal U c curves for different variations in fuel flow ⁇ Q F , and each of which corresponds to a respective power gradient value ⁇ P/ ⁇ t. In the event of a variation in fuel flow ⁇ Q F
- analysis module 31 selects a given control signal U c from library module 30 on the basis of power gradient value ⁇ P/ ⁇ t and fuel flow variation value ⁇ Q F , and supplies it to first control module 18.
- control signal U c supplied to drive module 28 substantially overrides control of actuator 7 based on temperature error e ⁇ . That is, control signal U c from second control module 20 acts on drive module 28 so that drive signal U IGV produces a variation in the position of the IGVs based mainly on power gradient value ⁇ P/ ⁇ t and the variation in fuel flow Q F .
- control device 5 is able to respond to given variations in power P and fuel flow Q F , before these variations affect exhaust temperature T 3 , and therefore to make a prompt adjustment to the position of the IGVs. Operation of control device 5 as described above produces an exhaust temperature T 3 pattern, as a function of the power output P percentage of rated power P N , as shown in Figure 4.
- Figure 4 shows a first exhaust temperature T 3 curve 40, as controlled by control device 5 when selector 24 is set to select a constant exhaust temperature reference value T SRIF c- Curve 40 increases steadily up to exhaust temperature reference value TsRiFC/ at which point, adjustment of the position of the IGVs by control device 5 produces a constant exhaust temperature T 3 until the IGVs are fully opened.
- Curves 41 and 42 show exhaust temperature T 3 as controlled by control device 5 when selector 24 is set to select a variable exhaust temperature reference value T SRIFV .
- curve 41 shows exhaust temperature T 3 of a plant equipped with an ecological burner, which safely permits high temperatures within the maximum permitted NO x emission level.
- first computing module 25 of variable reference module 23 is based on a function F(IGV P03 ) ( Figure 3) designed for plants with ecological burners, i.e. capable of sustaining higher exhaust temperatures.
- the exhaust temperature T 3 curve 41 produced by control device 5 is therefore characterized by higher temperatures than the constant reference value curve
- Curve 40 especially at low percentage power P values (around 40%) .
- control device 5 the efficiency of plant 1 is therefore improved, especially at low power P values, the advantages of which are obvious, particularly during nighttime operation of plant 1, i.e. when the plant runs at minimum power P.
- Curve 42 shows exhaust temperature T 3 of a plant equipped with a conventional burner, which allows no increase in exhaust temperature T 3 , by resulting in unacceptable NO x emission levels.
- first computing module 25 of variable reference module 23 is therefore based on a function F(IGV P03 ) designed for plants with conventional burners, to produce an exhaust temperature T 3 curve (42) characterized by lower temperatures than the constant reference value curve (curve 40) at low power output P values (around 40%) .
- Reducing exhaust temperature T 3 greatly reduces NO x emissions, which is particularly important when operating at minimum environmental load.
- minimum power P i.e. at minimum environmental load
- a large amount of highly pollutant gas must be supplied to keep the flame of burner 10 alive, so that NO x emissions are normally substantially high.
- control device 5 it is therefore possible to lower exhaust temperature T 8 and, hence, NO x emissions at the minimum environmental load.
- Control device 5 also provides for lowering the minimum environmental load value. That is, by lowering exhaust temperature T 3 , gas supply to keep the flame of burner 10 alive can be increased and the minimum environmental load value therefore reduced.
- Figure 4 shows two curves 41 and 42 of exhaust temperature T 3 as controlled by control device 5 when selector 24 is set to select a variable exhaust temperature reference value T SRIFV - Depending on the set function F(IGV PO s) of first computing module 25 of variable reference module 23, however, a number of different exhaust temperature T 3 curves may be obtained as required.
- selector 24 is set to select a variable exhaust temperature reference value T SRIFV -
- F(IGV PO s) of first computing module 25 of variable reference module 23 a number of different exhaust temperature T 3 curves may be obtained as required.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2007/000556 WO2009016665A1 (en) | 2007-08-01 | 2007-08-01 | Device and method for regulating the exhaust temperature of a gas turbine |
EP07827626A EP2185868A1 (en) | 2007-08-01 | 2007-08-01 | Device and method for regulating the exhaust temperature of a gas turbine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2007/000556 WO2009016665A1 (en) | 2007-08-01 | 2007-08-01 | Device and method for regulating the exhaust temperature of a gas turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009016665A1 true WO2009016665A1 (en) | 2009-02-05 |
Family
ID=39272383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2007/000556 WO2009016665A1 (en) | 2007-08-01 | 2007-08-01 | Device and method for regulating the exhaust temperature of a gas turbine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2185868A1 (en) |
WO (1) | WO2009016665A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20090766A1 (en) * | 2009-05-06 | 2010-11-07 | Ansaldo Energia Spa | DEVICE AND METHOD TO CHECK THE TEMPERATURE AT THE DISCHARGE OF A GAS TURBINE OF AN ENERGY PRODUCTION PLANT |
ITMI20110811A1 (en) * | 2011-05-10 | 2012-11-11 | Ansaldo Energia Spa | METHOD OF CONTROL TO CONTROL THE GAS FEED DRIVES AT LEAST ONE BURNER GROUP OF A GAS TURBINE PLANT AND GAS TURBINE SYSTEM |
CN102828802A (en) * | 2011-06-15 | 2012-12-19 | 通用电气公司 | Systems and methods for combustor emissions control |
ITMI20131817A1 (en) * | 2013-10-31 | 2015-05-01 | Ansaldo Energia Spa | METHOD AND CONTROL DEVICE TO CONTROL A GAS TURBINE ELECTRIC ENERGY PRODUCTION PLANT |
US10801361B2 (en) | 2016-09-09 | 2020-10-13 | General Electric Company | System and method for HPT disk over speed prevention |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US2867084A (en) * | 1954-03-22 | 1959-01-06 | Bendix Aviat Corp | Fuel feed and power control system for gas turbine engines having an engine temperature control |
GB1374871A (en) * | 1971-10-15 | 1974-11-20 | Westinghouse Electric Corp | Digital computer control system for monitoring and controlling operation of industrial gas turbine apparatus |
US3956883A (en) * | 1974-08-08 | 1976-05-18 | Westinghouse Electric Corporation | Smooth and highly responsive gas turbine temperature limit control especially useful in combined cycle electric power plants |
US4380146A (en) * | 1977-01-12 | 1983-04-19 | Westinghouse Electric Corp. | System and method for accelerating and sequencing industrial gas turbine apparatus and gas turbine electric power plants preferably with a digital computer control system |
EP1231369A2 (en) * | 2001-02-07 | 2002-08-14 | General Electric Company | Gas turbine control system compensating water content in combustion air |
EP1533573A1 (en) * | 2003-11-20 | 2005-05-25 | General Electric Company | Method for controlling fuel splits to a gas turbine combustor |
EP1679563A1 (en) * | 2004-12-29 | 2006-07-12 | Ansaldo Energia S.P.A. | Device and method for controlling a gas turbine electric power generating system |
-
2007
- 2007-08-01 WO PCT/IT2007/000556 patent/WO2009016665A1/en active Application Filing
- 2007-08-01 EP EP07827626A patent/EP2185868A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US2867084A (en) * | 1954-03-22 | 1959-01-06 | Bendix Aviat Corp | Fuel feed and power control system for gas turbine engines having an engine temperature control |
GB1374871A (en) * | 1971-10-15 | 1974-11-20 | Westinghouse Electric Corp | Digital computer control system for monitoring and controlling operation of industrial gas turbine apparatus |
US3956883A (en) * | 1974-08-08 | 1976-05-18 | Westinghouse Electric Corporation | Smooth and highly responsive gas turbine temperature limit control especially useful in combined cycle electric power plants |
US4380146A (en) * | 1977-01-12 | 1983-04-19 | Westinghouse Electric Corp. | System and method for accelerating and sequencing industrial gas turbine apparatus and gas turbine electric power plants preferably with a digital computer control system |
EP1231369A2 (en) * | 2001-02-07 | 2002-08-14 | General Electric Company | Gas turbine control system compensating water content in combustion air |
EP1533573A1 (en) * | 2003-11-20 | 2005-05-25 | General Electric Company | Method for controlling fuel splits to a gas turbine combustor |
EP1679563A1 (en) * | 2004-12-29 | 2006-07-12 | Ansaldo Energia S.P.A. | Device and method for controlling a gas turbine electric power generating system |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20090766A1 (en) * | 2009-05-06 | 2010-11-07 | Ansaldo Energia Spa | DEVICE AND METHOD TO CHECK THE TEMPERATURE AT THE DISCHARGE OF A GAS TURBINE OF AN ENERGY PRODUCTION PLANT |
EP2249006A1 (en) * | 2009-05-06 | 2010-11-10 | Ansaldo Energia S.p.A. | Device and method for controlling the exhaust temperature of a gas turbine of a power plant |
ITMI20110811A1 (en) * | 2011-05-10 | 2012-11-11 | Ansaldo Energia Spa | METHOD OF CONTROL TO CONTROL THE GAS FEED DRIVES AT LEAST ONE BURNER GROUP OF A GAS TURBINE PLANT AND GAS TURBINE SYSTEM |
EP2522908A1 (en) * | 2011-05-10 | 2012-11-14 | Ansaldo Energia S.p.A. | Control method for controlling the pilot gas supply to at least one burner assembly of a gas turbine plant and gas turbine plant |
CN102828802A (en) * | 2011-06-15 | 2012-12-19 | 通用电气公司 | Systems and methods for combustor emissions control |
EP2535643A3 (en) * | 2011-06-15 | 2014-01-08 | General Electric Company | Systems and methods for combustor emissions control |
US9021779B2 (en) | 2011-06-15 | 2015-05-05 | General Electric Company | Systems and methods for combustor emissions control |
ITMI20131817A1 (en) * | 2013-10-31 | 2015-05-01 | Ansaldo Energia Spa | METHOD AND CONTROL DEVICE TO CONTROL A GAS TURBINE ELECTRIC ENERGY PRODUCTION PLANT |
WO2015063735A1 (en) * | 2013-10-31 | 2015-05-07 | Ansaldo Energia S.P.A. | Control method and device for controlling a gas turbine plant for electrical energy production |
CN105899785A (en) * | 2013-10-31 | 2016-08-24 | 安萨尔多能源公司 | Control method and device for controlling a gas turbine plant for electrical energy production |
CN105899785B (en) * | 2013-10-31 | 2017-11-10 | 安萨尔多能源公司 | For controlling the control method and equipment of the gas-turbine plant for generating electricity |
US10801361B2 (en) | 2016-09-09 | 2020-10-13 | General Electric Company | System and method for HPT disk over speed prevention |
Also Published As
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