CN108506098A - Gas turbine combustion optimal control adjusts system and method for adjustment - Google Patents
Gas turbine combustion optimal control adjusts system and method for adjustment Download PDFInfo
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- CN108506098A CN108506098A CN201810202868.8A CN201810202868A CN108506098A CN 108506098 A CN108506098 A CN 108506098A CN 201810202868 A CN201810202868 A CN 201810202868A CN 108506098 A CN108506098 A CN 108506098A
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- 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
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- 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
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
Abstract
The present invention relates to a kind of gas turbine combustion optimal control adjustment system and methods of adjustment.It is current urgent problem to provide a kind of gas turbine combustion optimal control method of adjustment with general applicability.The present invention after determining that unit must carry out burning optimization adjustment, determines the effective running boundary range of combustion engine combustion parameter it is first determined whether combustion engine must carry out combustion control adjustment；Secondly various parameter values of the unit when entering temperature control at full capacity at a temperature of collection varying environment, and compare the effective running boundary range of gas turbine combustion parameter and deviate reason to analyze burning, determine the adjustment mode of each fuel control valve and real-time online adjustment fuel to air equivalence ratio；The ascending, descending process of combustion engine load is finally carried out, on-line tuning corrects the opening value of each fuel control valve, adjusts operate in optimum state under the conditions of prevailing circumstances until combustion engine repeatedly.The present invention can carry out all types of gas turbines combustion control adjustment, applied widely.
Description
Technical field
The present invention relates to a kind of gas turbine combustion optimal control adjustment system and methods of adjustment, belong to combustion engine key core
Technical field is related to combustion monitoring analysis and the control adjustment of combustion engine.
Background technology
Combustion engine is generally acknowledged at present environment-friendly high-efficiency generating set, and China's combustion engine mainly has combustion gas and fuel oil two types,
Middle combustion gas type unit accounts for the overwhelming majority, using premix dry type low nitrogen burning mode.Each company's burner types type is various, packet
DLE, DLN1.0, DLN2.0, DLN2.0+, DLN2.6, DLN2.6+ etc. are included, further includes HR3, ULN and F3, F4 etc..
Since gas turbine combustion optimal control adjustment is related to gas turbine core control system and combustion system, this
A little technologies rest in supplier's hand, and domestic scientific research debugging unit and electricity power enterprise do not grasp the optimization of complete machine firing optimization
The standard and method of control, every year must not non-payment great number firing optimization optimal control expense, simultaneously because can not on demand and
The optimization of Shi Jinhang firing optimizations also results in the serious problems such as damage and the shortening of equipment life of burning hot jacket component.
Application No. is 201310359612.5 Chinese patents to disclose a kind of low firing optimization sides NO of gas turbine dry
Method, by the adjustment of control constant come realize to D5, PM1, PM4 of DLN-2+ combustion systems and it is clear blow air controlling value into
Row adjustment in real time, until burning dynamic pressure monitoring result and NOx, CO discharge are all in suitable numerical value.This method is directed to
DLN-2+ combustion systems are adjusted, and have certain limitation.
Therefore provide a kind of independent research, the gas turbine combustion optimal control method of adjustment with general applicability be
Urgent problem at present.
Invention content
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and provide a kind of reasonable in design
Gas turbine combustion optimal control adjusts system and method for adjustment, is carried out for the combustion engine using various premixed combustion modes online
Real-time combustion control adjustment.
Technical solution is used by the present invention solves the above problems：A kind of gas turbine combustion optimal control adjustment system
System, which is characterized in that effectively run each parameter decision module, adjustment side including combustion engine burning optimization adjustment determination module, combustion engine
Formula determination module, combustion stability adjustment module, burning and exhausting value adjustment module, combustion stability and burning and exhausting value reasonability
Determination module and combustion engine safe operation determination module；The combustion engine burning optimization adjustment determination module is effectively run with combustion engine respectively
Each parameter decision module is connected with combustion engine safe operation determination module, and the combustion engine effectively runs each parameter decision module and adjustment
Mode determination module connects, and the adjustment mode determination module is connect with combustion stability adjustment module, the combustion stability
Adjustment module is connect with burning and exhausting value adjustment module, the burning and exhausting value adjustment module and combustion stability and burning and exhausting
It is worth the connection of reasonability determination module, the combustion stability and burning and exhausting value reasonability determination module are sentenced with combustion engine safe operation
Cover half block connects.It is general adjustment system that gas turbine combustion optimal control, which adjusts system, can be to each main Types combustion gas
Turbine carries out combustion control adjustment, can effectively determine its combustion parameter efficiency frontier range and combustion engine optimal control is made to adjust
After operate in the current optimum state of unit.
Furthermore, the adjustment mode determination module includes DCS control systems, and the DCS control systems are for real
When collect key parameter values of the gas turbine under varying environment temperature, different load, different burning switching condition.Thus with combustion
Machine fuel design parameter value is compared, and analyzes the burning operation present situation of current unit.
Furthermore, the combustion stability adjustment module includes combustion stability detecting system, the flameholding
Property detecting system for obtaining correct combustion stability characterization parameter value in real time.Whether monitoring combustion stability is adjusted to design
It is required that optimum operation bounds in.
Furthermore, the burning and exhausting value adjustment module includes smoke test analysis system, the smoke test point
Analysis system for obtaining correctly discharge parameter value in real time.Whether monitoring discharge value is adjusted in the range of operation of design requirement.
A kind of method of adjustment of gas turbine combustion optimal control adjustment system as described above, which is characterized in that described
Method of adjustment is as follows：
(1) in combustion engine burning optimization adjusts determination module, judge whether that combustion engine must carry out combustion control adjustment；
(2) work as step（1）After middle determining unit must carry out burning optimization adjustment, each parameter decision mould is effectively run in combustion engine
In block, effective low-carbon combustion running boundary range of gas turbine is determined according to the attribute of all types of gas turbines and determines combustion engine
Optimum operation fuel to air equivalence is than range and corresponding fuel valve opening parameter value；
(3) in adjustment mode determination module, by former design fuel to air equivalence, when corresponding fuel adjusting valve opening parameter value is transported
Row unit, by DCS control system real-time collecting units under varying environment temperature, different load, different burning switching conditions
Key parameter values, compare combustion engine fuel design parameter value by the key parameter values of collection, analyze the burning fortune of current system
Row present situation determines the reason of burning off-target running boundary range and determines the adjustment mode of fuel control valve, including adjusts
The adjustment direction and amplitude of valve and ordinal relation etc.；
(4) in combustion stability adjusts module, according to step（3）The adjustment mode of the middle determining fuel control valve of analysis exists
Real time modifying controls the aperture parameter value of each fuel control valve in adjustment system in ± 1% aperture variation range of critical load section, and
By installation or the original combustion stability detecting system of unit obtain in real time correct combustion stability parameter value until combustion
It burns stability to reach in the optimum operation bounds of design requirement, combustion pressure cold front and hot cutting edge of a knife or a sword value all should not be high at this time；Combustion
The combustion pressure pulsation monitoring system that Detection of Stability system mostly uses greatly the analysis of thermoacoustic pressure spectrum is burnt, can also refer to use it
Its effective analysis system.
(5) in step（4）In be adjusted to appropriate combustion stability after, in burning and exhausting value adjusts module, closing
Modification controls the aperture parameter value of each fuel control valve in adjustment system in ± 1% aperture variation range of key load section, and by adding
The fill or original smoke test analysis system of unit obtains correctly discharge parameter value and is set until discharge value adjusts to reach in real time
It counts in desired range of operation, the discharge value of most of load section all adjusts in optimum operation claimed range at this time；
(6) it in combustion stability and burning and exhausting value reasonability determination module, is dropped again according to load spacer elder generation one way load up
Step is repeated several times in load（4）With（5）, until within the scope of the optimum operation that combustion stability and discharge value reach design requirement；
In combustion engine safe operation determination module, determine that combustion engine safe operation, combustion engine combustion control adjustment process terminate.Work as step
（1）When middle determining unit need not carry out burning optimization adjustment, it is directly entered combustion engine safe operation determination module, determines combustion engine safety
Operation.
In step（2）In, for specific combustion system, the variation range of calorific value is limited.Selected burner,
Nozzle is only adapted to the pressure ratio of fixed range, therefore foundation is used for weighing the phase into burner when variation of ambient temperature is little
Can only be that the fuel quantity that adjustment is burnt ensures that combustion engine is burnt when different load is run be shown to the correction weber index of energy
The pressure ratio of device nozzle just can guarantee accurate spatial load forecasting.The Lower heat value of combustion gas, opposite proportion are by gas pressure regulating module gas phase
Chromatograph is detected and is calculated, and calculates correction weber exponential quantity into DCS control systems, and fuel correction weber index amendment
In limitation range, multiplied by the proportional gain constant adjusted with servo valve control, limits, pass through further according to the condition of emission request
Change each fuel tune valve opening and match air capacity that compressor is sent and changes to realize accurate best fuel to air equivalence ratio
Load also determines the best combustion bounds of combustion engine.
Furthermore, in step（1）In, combustion control adjustment must be carried out when there are following situations in time；
A) when spring, autumn variation of ambient temperature are big；
B) relative combustion component experienced replacement, transformation, adjustment or maintenance after combustion engine maintenance；
C) there is accident in combustion engine, after relative combustion component breaks down and restores；
D) when the propellant composition burnt changes；
E) when combustion engine unit performance is tested；When especially combustibility is tested；
F) the combustion engine capital construction phase debugs the stage；
G) when apparent NOx emission index deterioration and combustion stability reduction occurs in combustion engine, including exhaust dispersity becomes larger, shakes
It is dynamic to become larger and CO concentration rises etc..
Furthermore, in step（2）In, the attribute of gas turbine includes burner combustion Design Mechanism, passage of heat portion
Part heatproof compression feature, temperature control datum line and each fuel control valve control strategy etc..
Furthermore, in step（3）In, key parameter values include combustion stability characterization parameter value, NOx emission value,
CO discharge values, compressor delivery pressure, compressor delivery temperature, turbine exhaust temperature, exhaust dispersity, IGV angle, each fuel
Control valve opening value and direction of action and sequence etc..
Furthermore, in step（4）In, combustion stability characterization parameter value includes pressure fluctuation, pressure acceleration, frequency
Rate, combustion flame intensity and flame flicking frequency etc.；In step（5）In, discharge parameter value includes NOx and CO discharge values etc..
Furthermore, burn ranging from one mutual shadow between section and combustion stability and emission performance of optimum operation
When ringing, therefore adjusting based on combustion stability, supplemented by discharge value, discharge value is in zone of reasonableness after flameholding；Entirely
Ordinal relation during adjustment is as follows：Diffusion combustion is first adjusted after ensuring total fuel valve supply gas pressure and combustion gas total amount abundance
The branch fuel control valve of nozzle turns down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；It adjusts again
Inner most premixing nozzle turns down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Again successively by firing
Burner interior adjusts each nozzle, is turned down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Most
The relationship of each fuel control valve is integrated afterwards and the most zone of reasonableness of effect selection one and is modified in the control parameter of unit.Burning is steady
Qualitative factor is monitored frequently with combustion pressure pulsation monitoring system in real time at present, but do not limit to and this, can also be used it is other as fire
Other effective tools such as intensity monitoring system or equipment are examined to realize.
Compared with prior art, the present invention haing the following advantages and effect：The present invention, which is directed to, uses various premixed combustion sides
The combustion engine of formula carries out online combustion control adjustment real-time, applied widely, can improve combustion engine operational efficiency, improve combustion
Stability is burnt, extends combustion engine equipment life, slow down hot jacket parts damages and reduces combustion engine discharge value.
Description of the drawings
Fig. 1 is each module connection relation structural schematic diagram in the embodiment of the present invention.
Fig. 2 is the burning optimum operation fuel to air equivalence of Middle combustion engine of embodiment of the present invention design than range schematic diagram.
Fig. 3 is the structural schematic diagram of certain company DLN2.6+ type combustion engine in the embodiment of the present invention.
Fig. 4 is the flow diagram of gas turbine combustion optimal control method of adjustment in the embodiment of the present invention.
The flow diagram of Fig. 5 each combustion gas tune valve equipment adjustment modes when being Middle combustion engine firing optimization of the embodiment of the present invention.
Fig. 6 is the flow diagram of certain company DLN2.6+ types combustion engine equipment adjustment process in the embodiment of the present invention.
In figure：Combustion engine burning optimization adjustment determination module 1, combustion engine effectively runs each parameter decision module 2, adjustment mode is sentenced
Cover half block 3, combustion stability adjustment module 4, burning and exhausting value adjustment module 5, combustion stability and burning and exhausting value reasonability
Determination module 6, combustion engine safe operation determination module 7.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
Embodiment.
Referring to Fig. 1, a kind of gas turbine combustion optimal control adjustment system, including combustion engine burning optimization adjust determination module
1, combustion engine effectively runs each parameter decision module 2, adjustment mode determination module 3, combustion stability adjustment module 4, burning and exhausting
Value adjustment module 5, combustion stability and burning and exhausting value reasonability determination module 6 and combustion engine safe operation determination module 7；Combustion engine
Burning optimization adjustment determination module 1 effectively runs each parameter decision module 2 and combustion engine safe operation determination module 7 with combustion engine respectively
Connection, combustion engine effectively run each parameter decision module 2 and are connect with adjustment mode determination module 3, adjustment mode determination module 3 and combustion
It burns stability adjustment module 4 to connect, combustion stability adjusts module 4 and connect with burning and exhausting value adjustment module 5, burning and exhausting value
Adjustment module 5 is connect with combustion stability and burning and exhausting value reasonability determination module 6, and combustion stability and burning and exhausting value are closed
Rationality determination module 6 is connect with combustion engine safe operation determination module 7.
Adjustment mode determination module 3 includes DCS control systems, and DCS control systems are for real-time collecting gas turbine not
Key parameter values under same environment temperature, different load, different burning switching conditions；It includes combustion that combustion stability, which adjusts module 4,
Detection of Stability system is burnt, combustion stability detecting system for obtaining correct combustion stability characterization parameter value in real time；Combustion
It includes smoke test analysis system to burn discharge value adjustment module 5, and smoke test analysis system for obtaining correctly discharge in real time
Parameter value.
A kind of method of adjustment of gas turbine combustion optimal control adjustment system as described above, method of adjustment are as follows：
(1) in combustion engine burning optimization adjusts determination module 1, judge whether that combustion engine must carry out combustion control adjustment；
(2) work as step（1）After middle determining unit must carry out burning optimization adjustment, each parameter decision mould is effectively run in combustion engine
In block 2, determines effective low-carbon combustion running boundary range of gas turbine according to the attribute of all types of gas turbines and determine and fire
Machine optimum operation fuel to air equivalence is than range and corresponding fuel valve opening parameter value；
(3) in adjustment mode determination module 3, fuel to air equivalence when corresponding fuel adjusting valve opening parameter value is designed by former
Operating unit, by DCS control system real-time collecting units in varying environment temperature, different load, different burning switching conditions
Under key parameter values, compare combustion engine fuel design parameter value by the key parameter values of collection, analyze the burning of current system
The reason of running present situation, determining burning off-target running boundary range and the adjustment mode for determining fuel control valve；
(4) in combustion stability adjusts module 4, according to step（3）The adjustment mode of the middle determining fuel control valve of analysis exists
Real time modifying controls the aperture parameter value of each fuel control valve in adjustment system in ± 1% aperture variation range of critical load section, and
By installation or the original combustion stability detecting system of unit obtain in real time correct combustion stability parameter value until combustion
Stability is burnt to reach in the optimum operation bounds of design requirement；
(5) in step（4）In be adjusted to appropriate combustion stability after, in burning and exhausting value adjusts module 5, in key
Modification controls the aperture parameter value of each fuel control valve in adjustment system in ± 1% aperture variation range of load section, and passes through installation
Or the original smoke test analysis system of unit in real time obtain correctly discharge parameter value until discharge value adjustment reach design
It is required that range of operation in, the discharge value of most of load section all adjusts in optimum operation claimed range at this time；
(6) in combustion stability and burning and exhausting value reasonability determination module 6, again according to load spacer elder generation one way load up
Step is repeated several times in load down（4）With（5）, until combustion stability and discharge value reach the optimum operation range of design requirement
It is interior；In combustion engine safe operation determination module 7, determine that combustion engine safe operation, combustion engine combustion control adjustment process terminate.
Burning optimum operation ranging from one interacts between section and combustion stability and emission performance, therefore when adjustment
Based on combustion stability, supplemented by discharge value, discharge value is in zone of reasonableness after flameholding；It is suitable during entire adjustment
Order relation is as follows：The branch fuel of diffusion combustion nozzle is first adjusted after ensuring total fuel valve supply gas pressure and combustion gas total amount abundance
Regulating valve turns down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Inner most premix spray is adjusted again
Mouth turns down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Again successively from burner internal to outside
Each nozzle is adjusted, is turned down after first opening greatly, a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Finally integrate each fuel tune
The relationship and the most zone of reasonableness of effect selection one of section valve are simultaneously modified in the control parameter of unit.
In step（1）In, combustion control adjustment must be carried out when there are following situations in time；
A) when spring, autumn variation of ambient temperature are big；
B) relative combustion component experienced replacement, transformation, adjustment or maintenance after combustion engine maintenance；
C) there is accident in combustion engine, after relative combustion component breaks down and restores；
D) when the propellant composition burnt changes；
E) when combustion engine unit performance is tested；
F) the combustion engine capital construction phase debugs the stage；
G) when there is apparent NOx emission index deterioration and combustion stability reduction in combustion engine.
In step（2）In, the attribute of gas turbine includes burner combustion Design Mechanism, hot passage parts heatproof compression spy
Point, temperature control datum line and each fuel control valve control strategy.
In step（3）In, key parameter values include combustion stability characterization parameter value, NOx emission value, CO discharge values, pressure
Mechanism of qi outlet pressure, compressor delivery temperature, turbine exhaust temperature, exhaust dispersity, IGV angle, each fuel adjusting valve opening
Value and direction of action and sequence.
In step（4）In, combustion stability characterization parameter value includes pressure fluctuation, pressure acceleration, frequency, combustion flame
Intensity and flame flicking frequency；
In step（5）In, discharge parameter value includes NOx and CO discharge values.
Referring to Fig. 2 to Fig. 6, with reference to being carried out for the combustion engine of certain company DLN2.6+ type of burner, combustion engine burning is excellent
Changing control adjustment introduction, the present invention is further explained.
Fig. 3 is certain company DLN2.6+ type combustion engine structure diagrams, 4 kinds of fuel nozzles of the combustion chamber configuration of DLN2.6+：
D5, PM1, PM3, PM2, wherein PM2 and PM3 are divided into as internal channel and outer tunnel, each corresponding fuel valve be respectively VGC1,
VGC2、VGC3、VGC4.In addition also have and be vented the continuous purge gass Contionuous Purge attracted from compressor all the way.Although
DLN2.6+ pollutant emission values are very low, but the pollutant emission in startup stage is still higher, and reason is exactly to be to spread
Flame all exists when starting up to 20% load, and the duration is very long, is repaiied to the control logic of DLN2.6+ for this
Change, use new control algolithm, accurately controls the operation temperature control line of combustion chamber, make it closer to flameholding limiting value.From
And the usage time of diffusion flame is made to be greatly shortened, this technology is named as low nitrogen start-up technique（LVE）, the country is for the first time in China
No. 8 machines of electric halfway up the hill power plant are transformed successfully, and application is as follows：
1）First from combustion engine safe operation and environment protection emission angle by the operation present situation judgment of combustion engine, this combustion engine burner from
DLN2.6+ general types transform DLN2.6+LVE types as, therefore to avoid efficiency reduction, equipment damage, discharge exceeded, meet
It must carry out the opportunity condition of combustion control adjustment.
2）According to DLN2.6+ type combustion engine burner combustions Design Mechanism, hot passage parts heatproof compression feature, temperature control base
Directrix and each fuel control valve control strategy etc. determine effective low-carbon combustion running boundary range of combustion engine（Referring to Fig. 2）, simultaneously
Also combustion engine optimum operation fuel to air equivalence when corresponding fuel tune valve opening parameter and burning operational mode etc. are specified；
MODE D（Spread D mode）：Combustion engine is lighted a fire by MODE D modes.After unit reaches fire speed, blow valve is closed,
SRV opens to control P2 fuel pressures, D5 control valves（VGC1）It opens to igniting set point.State is at this time：
Five peripheral injector nozzles D5 diffusion flame combustions；
PM2 and PM3 pipelines start to purge when 95% rotating speed.
MODE 1D（Sub- guide premixes 1D）：After flame stabilization, warming-up terminates, and generating unit speed rises to FSNL.At 95% turn
When fast, combustion mode is switched to MODE 1D patterns, at this time five peripheral injector nozzles diffusion flames, central nozzle premixed flame（VGC2
It opens to igniting value）, blow out system puts into operation, and compressor exhaust carries out lasting clear blow to PM2 and PM3 pipelines.Shape at this time
State is：
Five peripheral injector nozzles D5 diffusion flame combustions；
Central nozzle PM1 premixed flames burn；
PM2 and PM3 pipelines start to purge.
MODE 4D（Guide premixes 4D）：After grid-connected, unit starts about 20% load of load up, when TTRF1 rises to certain value,
The clear of PM3 blows valve closing.When determining after blowing valve closing clearly of PM3, PM3 gas pipelines put into operation（VGC4 input igniting apertures
Value）, combustion mode is switched to MODE 4D, and five peripheral injector nozzles are still diffusion flame at this time, and PM3 and PM1 are premixed flame.This
When state：
Five peripheral injector nozzles D5 diffusion flame combustions；
Central nozzle PM1 and PM3 nozzle premixed flame burns；
PM2 pipelines purge.
MODE 4（Asia premix）：When unit starts about 30% load of load up, when TTRF1 rises to lower certain value, D5 pipelines move back
Go out operation（VGC1, which stops transport, to close）, D5 puts into operation in clear blowpipe road, and combustion mode is switched to MODE 4, and only PM3 and PM1 are at this time
Premixed flame（VGC2 and VGC3 puts into premixed combustion opening value）.State is at this time：
Central nozzle PM1 and PM3 nozzle premixed flame burns；
Spread pipeline and PM2 pipelines purging.
MODE 6.3（Premix）：When load rises to 40% base load or so（Third TTRF1 definite values）When：The clear blowpipes of PM2
Road is out of service, and PM2 nozzles put into operation（VGC2 puts into igniting value）, combustion mode is switched to MODE 6.3.Whole premix combustions
It burns nozzle to put into operation, D5 pipelines are blown clearly.State is at this time：
All 6 each nozzles are premixed flame burning；
Spread pipeline purging.
The combustion boundary basic parameter of the combustion engine in Fig. 3 is the super 50ppm of NOx emission in startup stage at this time, at full capacity
Stage NOx is 15ppm or so, and CO is 25ppm or so, while speed ratio valve opening ensures fuel P2 pressure values, and each VGC valves are one
Fixed opening value burns to stablize.
3）By DCS control system real-time collecting units in varying environment temperature, different load, different burning switching conditions
Under key parameter numerical value（Combustion stability characterization parameter value, CO discharge values, compressor delivery pressure, is calmed the anger at NOx emission value
Machine delivery temperature, turbine exhaust temperature, exhaust dispersity, IGV angle, each gas control valve opening value etc.）, pass through the pass of collection
Bond parameter numeric ratio is to step 2）Middle combustion engine fuel design parameter value, the combustion position under analysis system present situation substantially determine combustion
The reason of burning off-target operation fuel air ratio and adjustment direction and the amplitude etc. that determine fuel adjusting valve opening parameter；Such as this example
Although DLN2.6+ pollutant emissions value is very low in, still higher in startup stage pollutant emission, and reason is exactly to be to expand
It dissipates flame when starting up to 20% load all to exist, the duration is very long, carries out the control logic of DLN2.6+ for this
Modification, uses new control algolithm,（Traditional DLN2.6+ combustion control modes are IGV apertures, fuel flow rate, inlet air heating
It has to simultaneously control, DLN2.6+LVE controlling parties rule carries out only the Decoupleds such as IGV apertures, fuel flow rate, inlet air heating
Vertical control）The operation temperature control line for accurately controlling combustion chamber, makes it closer to flameholding limiting value.To make diffusion flame when
Between be greatly shortened, therefore, in addition to emphasis MODE 6.3 in this example（Premix）The burning optimization in stage, should also be to MODE D
（Spread D mode）With MODE 1D（Sub- guide premixes 1D）The attenuating discharge of its time is shortened in middle close attention as possible.
4）According to step 3）Middle analysis is in critical load section small range（± 1% aperture changes）In real time modifying control system
The aperture parameter value of each fuel control valve, and by installation or the original combustion stability detecting system of unit in real time obtain just
True combustion stability characterization parameter value（Pressure fluctuation, pressure acceleration, frequency, combustion flame intensity, flame flicking frequency
Deng）, since DLN2.6+LVE combustion stabilities are preferable, combustion stability is adjusted, design requirement can be rapidly achieved substantially, and
Combustion pressure cold front and hot cutting edge of a knife or a sword be not high at this time；
5）In step 4）Afterwards, in critical load section small range（± 1% aperture changes）Change each fuel control valve in control system
Aperture parameter value, and by installation or the original smoke test analysis system of unit in real time obtain correctly discharge parameter value
（Mainly NOx and CO discharge values etc.）, emphasis is to MODE D in this example（Spread D mode）With MODE 1D（Sub- guide's premix
1D）Middle adjustment valve opening, shortening the time of association phase as possible makes discharge reduce as possible, and other general discharge capacitys of pattern can
Reach within the scope of service requirement well；
6）Finally according to suitable load spacer elder generation one way load up, step 3 is repeated several times in one way load down back and forth again）With 4）, directly
Within the scope of the optimum operation for reaching design requirement to combustion pressure stability and discharge value equilibrium.
Although the present invention is disclosed as above with embodiment, it is not limited to protection scope of the present invention, any to be familiar with
The technical staff of this technology changes and retouches made by without departing from the spirit and scope of the invention, should all belong to this hair
Bright protection domain.
Claims (10)
1. a kind of gas turbine combustion optimal control adjusts system, which is characterized in that adjust judgement mould including combustion engine burning optimization
Block, combustion engine effectively run each parameter decision module, adjustment mode determination module, combustion stability adjustment module, burning and exhausting value
Adjust module, combustion stability and burning and exhausting value reasonability determination module and combustion engine safe operation determination module；The combustion engine
Burning optimization adjustment determination module effectively runs each parameter decision module with combustion engine respectively and combustion engine safe operation determination module connects
It connects, the combustion engine effectively runs each parameter decision module and connect with adjustment mode determination module, the adjustment mode determination module
It is connect with combustion stability adjustment module, the combustion stability adjustment module is connect with burning and exhausting value adjustment module, described
Burning and exhausting value adjustment module connect with combustion stability and burning and exhausting value reasonability determination module, the combustion stability with
Burning and exhausting value reasonability determination module is connect with combustion engine safe operation determination module.
2. gas turbine combustion optimal control according to claim 1 adjusts system, which is characterized in that the adjustment mode
Determination module includes DCS control systems, the DCS control systems for real-time collecting gas turbine in varying environment temperature, no
Key parameter values under same load, different burning switching conditions.
3. gas turbine combustion optimal control according to claim 1 adjusts system, which is characterized in that the flameholding
Property adjustment module include combustion stability detecting system, the combustion stability detecting system in real time obtain correctly burning
Stability characterization parameter value.
4. gas turbine combustion optimal control according to claim 1 adjusts system, which is characterized in that the burning and exhausting
It includes smoke test analysis system that value, which adjusts module, and the smoke test analysis system for obtaining correctly discharge parameter in real time
Value.
5. a kind of tune of gas turbine combustion optimal control adjustment system as claimed in any one of claims 1-4
Adjusting method, which is characterized in that the method for adjustment is as follows：
In combustion engine burning optimization adjusts determination module, judge whether that combustion engine must carry out combustion control adjustment；
Work as step（1）After middle determining unit must carry out burning optimization adjustment, in combustion engine effectively runs each parameter decision module,
Effective low-carbon combustion running boundary range of gas turbine is determined according to the attribute of all types of gas turbines and determines that combustion engine is best
Fuel to air equivalence is run than range and corresponding fuel valve opening parameter value；
In adjustment mode determination module, by former design fuel to air equivalence, when corresponding fuel adjusting valve opening parameter value runs machine
Group, by pass of the DCS control system real-time collecting units under varying environment temperature, different load, different burning switching conditions
Bond parameter value compares combustion engine fuel design parameter value by the key parameter values of collection, and the burning operation for analyzing current system is existing
Shape determines the reason of burning off-target running boundary range and determines the adjustment mode of fuel control valve；
In combustion stability adjusts module, according to step（3）The adjustment mode of the middle determining fuel control valve of analysis is in key
Real time modifying controls the aperture parameter value of each fuel control valve in adjustment system in ± 1% aperture variation range of load section, and passes through
It is steady until burning that install additional the or original combustion stability detecting system of unit obtains correct combustion stability parameter value in real time
In the qualitative optimum operation bounds for reaching design requirement；
In step（4）In be adjusted to appropriate combustion stability after, in burning and exhausting value adjusts module, in critical load section
In ± 1% aperture variation range in modification control adjustment system each fuel control valve aperture parameter value, and by installation or machine
The original smoke test analysis system of group obtains in real time correctly discharges parameter value until discharge value adjustment reaches design requirement
In range of operation, the discharge value of most of load section all adjusts in optimum operation claimed range at this time；
In combustion stability and burning and exhausting value reasonability determination module, according to load spacer elder generation one way load up load down again
Step is repeated several times（4）With（5）, until within the scope of the optimum operation that combustion stability and discharge value reach design requirement；It is firing
In machine safe operation determination module, determine that combustion engine safe operation, combustion engine combustion control adjustment process terminate.
6. the method for adjustment of gas turbine combustion optimal control adjustment system according to claim 5, which is characterized in that
Step（1）In, combustion control adjustment must be carried out when there are following situations in time；
A) when spring, autumn variation of ambient temperature are big；
B) relative combustion component experienced replacement, transformation, adjustment or maintenance after combustion engine maintenance；
C) there is accident in combustion engine, after relative combustion component breaks down and restores；
D) when the propellant composition burnt changes；
E) when combustion engine unit performance is tested；
F) the combustion engine capital construction phase debugs the stage；
G) when there is apparent NOx emission index deterioration and combustion stability reduction in combustion engine.
7. the method for adjustment of gas turbine combustion optimal control adjustment system according to claim 5, which is characterized in that
Step（2）In, the attribute of gas turbine includes burner combustion Design Mechanism, hot passage parts heatproof compression feature, temperature control base
Directrix and each fuel control valve control strategy.
8. the method for adjustment of gas turbine combustion optimal control adjustment system according to claim 5, which is characterized in that
Step（3）In, key parameter values include combustion stability characterization parameter value, NOx emission value, CO discharge values, blower outlet pressure
Power, compressor delivery temperature, turbine exhaust temperature, exhaust dispersity, IGV angle, each fuel control valve opening value and action side
To and sequence.
9. the method for adjustment of gas turbine combustion optimal control adjustment system according to claim 5, which is characterized in that
Step（4）In, combustion stability characterization parameter value includes pressure fluctuation, pressure acceleration, frequency, combustion flame intensity and flame
Flicker frequency；In step（5）In, discharge parameter value includes NOx and CO discharge values.
10. the method for adjustment of gas turbine combustion optimal control adjustment system according to claim 5, which is characterized in that
Burning optimum operation ranging from one interacts between section and combustion stability and emission performance, therefore steady to burn when adjustment
Based on qualitative, supplemented by discharge value, discharge value is in zone of reasonableness after flameholding；Ordinal relation during entire adjustment is such as
Under：The branch fuel control valve of diffusion combustion nozzle is first adjusted after ensuring total fuel valve supply gas pressure and combustion gas total amount abundance,
It is turned down after first opening greatly, a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Inner most premixing nozzle is adjusted again, is first opened
It is turned down after big, a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；It is each from burner internal to outside adjustment successively again
Nozzle turns down after first opening greatly, and a zone of reasonableness is determined by pressure fluctuation and fire inspection intensity；Finally integrate each fuel control valve
Relationship and the most zone of reasonableness of effect selection one are simultaneously modified in the control parameter of unit.
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