EP2927599A1 - Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs - Google Patents

Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs Download PDF

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Publication number
EP2927599A1
EP2927599A1 EP14162670.5A EP14162670A EP2927599A1 EP 2927599 A1 EP2927599 A1 EP 2927599A1 EP 14162670 A EP14162670 A EP 14162670A EP 2927599 A1 EP2927599 A1 EP 2927599A1
Authority
EP
European Patent Office
Prior art keywords
burner
fuel
fuel volume
volume flow
stages
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Withdrawn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
EP14162670.5A
Other languages
German (de)
English (en)
Inventor
Dieter Simon
Eberhard Deuker
Boris Ferdinand Kock
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 EP14162670.5A priority Critical patent/EP2927599A1/fr
Priority to PCT/EP2015/055837 priority patent/WO2015150099A1/fr
Priority to EP15710796.2A priority patent/EP3105508B1/fr
Publication of EP2927599A1 publication Critical patent/EP2927599A1/fr
Withdrawn legal-status Critical Current

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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
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/34—Feeding into different combustion zones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/20—Gas turbines
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/00013—Reducing thermo-acoustic vibrations by active means

Definitions

  • the present invention relates to a method for controlling a distribution of fuel to predetermined burner stages of at least one burner of a machine during a stationary engine operation, wherein the engine is in particular a gas turbine having a plurality of burners.
  • the maps can be supplemented by correction functions, such as an ambient temperature-dependent modulation of the guided to the individual burner stages fuel components.
  • correction functions such as an ambient temperature-dependent modulation of the guided to the individual burner stages fuel components.
  • a control is proposed according to the invention in which by gradual change of the fuel supply to the individual burner stages improved fuel allocation is determined by trial and error to keep the NOx content in the exhaust gas and the combustion stability below the predetermined limits.
  • An essential advantage of the method according to the invention is that an optimization of the fuel distribution always takes place automatically with changes in the ambient conditions or aging-related changes in the machine components, regardless of whether the influence of the changes on the combustion stability and / or on the NOx content in the exhaust gas are known or not.
  • the commissioning time of the machine can be carried out within a very short period of time thanks to the method according to the invention.
  • Conventional devices can be used as measuring devices. Measuring devices for determining the proportion of NOx in the exhaust gas are well known in the prior art. For example, sound sensors, pressure sensors or the like can serve as measuring devices for detecting the combustion stability. Whether the machine is in steady-state operation can be determined, for example, by monitoring the machine output.
  • the fuel volume flow in the newly performed step d) becomes equal by a predetermined value Direction as in the previous step d) changed. If the fuel volume flow has been increased in the previous step d), for example, it will be increased again in the step d) which has been carried out again. On the other hand, if the fuel volume flow was reduced in the previous step d), then it is also reduced in the renewed step d).
  • step f if, after performing a fuel volume flow change in step d), a deterioration of an evaluation variable is detected in step f), the fuel volume flow change performed in the previous step d) is reversed in the step d) carried out again. This prevents further deterioration from taking place.
  • the fuel volume flow has been increased when step d) is carried out for the first time it will now be reduced on the basis of the initial variable. If it was reduced when the step d) was carried out for the first time, it is now increased on the basis of the starting variable.
  • step c) if in step c) both an exceedance of the limit value for the combustion stability as well as an exceedance of the limit value for the NO x fraction in the exhaust gas are determined, only an improvement in step f) the evaluation parameter for the combustion stability or only an improvement in the evaluation of the NOx component in the exhaust gas considered.
  • one of the controlled variables receives a priority.
  • the steps b) to g), after having been carried out in accordance with step h) for all of the predetermined burner stages, are carried out again for the first burner stage.
  • an execution of the complete process cycle is followed by another process cycle so that the control can respond to changing disturbances.
  • the portion of the fuel volume flow by which the fuel supply of a burner stage is increased or reduced in step d) is preferably subtracted from the fuel volume flow of at least one of the other burner stages or at least added to one of the other burner stages, so that the total fuel flow volume supplied to the burner stages is kept constant , Accordingly, the machine performance is influenced only slightly or not at all by the regulation according to the invention.
  • the splitting of that portion of the fuel volume flow by which the fuel supply of a burner stage in step d) is increased or reduced to the other burner stages can be effected, for example, in equal proportions, proportionally to the current fuel distribution or in another manner.
  • the method according to the invention is terminated when no exceeding of limit values is detected in step c) or the machine leaves the stationary mode.
  • the latter can be determined, for example, by monitoring the machine performance.
  • the settings of the fuel volume flows to the individual burner stages, which are carried out in the context of carrying out steps b) to h), are preferably stored in matrices clustered according to engine power and ambient temperature. A restart of the machine can then be carried out based on a stored matrix, which is used as a map.
  • the method described below is for controlling a distribution of fuel to different burner stages of a plurality of annularly arranged burners of a gas turbine during a stationary gas turbine operation.
  • Each burner includes a pilot burner and a plurality of premix burners.
  • the pilot burner defines a first burner stage of a burner.
  • the premix burners of each burner form a second and a third burner stage. All pilot burners are supplied with fuel via a common first loop.
  • all premix burners of the second burner stage and all premix burners of the third burner stage are each supplied with fuel via a common second or third ring line.
  • burner stages is basically variable, as far as at least two burner stages are provided, which are supplied with fuel separately from each other.
  • a limit value for an evaluation parameter for the combustion stability or the buzzing behavior is determined. Further, in step S1, a threshold value for a NOx amount evaluation quantity in the exhaust gas is defined.
  • the limit values each form upper limits which should not be exceeded during stationary gas turbine operation.
  • a second step S2 the evaluation parameter for the combustion stability and the evaluation quantity for the NOx content in the exhaust gas during stationary engine operation are detected using suitable measuring devices, and cached, wherein the amounts of fuel that are supplied to the individual firing stages during steady-state operation, are known.
  • the stationary gas turbine operation can be determined, for example, by monitoring the engine power.
  • sound sensors, pressure sensors or the like can serve as measuring devices for detecting the combustion stability.
  • devices based on various measuring principles are available, which directly determine the proportion of NOx.
  • step S3.1 the measurement results cached in step S2 are compared with the limit values defined in step S1. If it is found in the context of such a comparison that none of the limit values has been exceeded, then step S2 is carried out again. If, on the other hand, it is determined in step S3 that at least one of the limit values has been exceeded, the fuel supply to the first burner stage is changed by a predetermined value in a further step S4.1. In other words, the first burner stage is now supplied with a predetermined amount of more or less fuel.
  • step S5.1 the combustion stability evaluation amount and the NOx amount evaluation amount in the exhaust gas are newly detected and latched in step S5.1 using the aforementioned measuring devices.
  • step S6.1 it is then assessed whether at least one of the control variables buffered in step S5.1 represents an improvement over one of the control variables buffered in step S2. If it is determined in step S6.1 that the change of the fuel supply in step S4.1 did not result in a deterioration of an evaluation variable, the fuel supply to the first burner stage in step S4.2 again becomes a predetermined value in the same direction as in step S4 .1 changed. If the fuel supply was increased in step S4.1, then it is in Step S4.2 increased again. On the other hand, if the fuel supply was reduced in step S4.1, it is also reduced in step S4.2. Then, the control variables are detected again using the measuring devices in step S5.2 and buffered.
  • step S6.2 it is evaluated in step S6.2 whether at least one of the control variables buffered in step S5.2 represents an improvement compared to the control variables buffered in step S5.2. If it is again determined in step S6.2 that the fuel supply in step S4.2 did not result in a deterioration of an evaluation variable, in step S4.3 the fuel supply is again changed in the same direction by a predetermined value, whereupon steps S5.3 and S6.3 are carried out in an analogous manner.
  • step S6.n 2, 3
  • step S4.n-1 the fuel supply is reset to that of step S4.n-1. Thereafter, the above-described procedure is sequentially applied to the second and the third burner stage.
  • step S3 If both exceeding of the limit value for the combustion stability and the exceeding of the limit value for the NOx content in the exhaust gas are determined in step S3, then only an improvement in the evaluation parameter for the combustion stability or in step S4.1 Improvement of the evaluation parameter for the NOx content in the exhaust gas is taken into account. In other words, one of the scores is given priority.
  • the method is terminated as soon as the gas turbine leaves the stationary mode or if no exceeding of limit values is determined in step S3.
  • the settings of the fuel supply to the individual burner stages which were made in the context of carrying out the method according to the invention, are stored in matrices clustered according to machine performance and ambient temperature. A restart of the machine can then be based on a stored matrix, which is then used as a map. As soon as the machine returns to stationary machine operation after restarting, the method according to the invention is carried out again.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
EP14162670.5A 2014-03-31 2014-03-31 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs Withdrawn EP2927599A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14162670.5A EP2927599A1 (fr) 2014-03-31 2014-03-31 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs
PCT/EP2015/055837 WO2015150099A1 (fr) 2014-03-31 2015-03-19 Procédé de régulation de la répartition du combustible sur différents étages de brûleur
EP15710796.2A EP3105508B1 (fr) 2014-03-31 2015-03-19 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14162670.5A EP2927599A1 (fr) 2014-03-31 2014-03-31 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs

Publications (1)

Publication Number Publication Date
EP2927599A1 true EP2927599A1 (fr) 2015-10-07

Family

ID=50389960

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14162670.5A Withdrawn EP2927599A1 (fr) 2014-03-31 2014-03-31 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs
EP15710796.2A Active EP3105508B1 (fr) 2014-03-31 2015-03-19 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15710796.2A Active EP3105508B1 (fr) 2014-03-31 2015-03-19 Procédé de réglage d'une distribution de carburant sur plusieurs étages de brûleurs

Country Status (2)

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EP (2) EP2927599A1 (fr)
WO (1) WO2015150099A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090133379A1 (en) * 2007-11-28 2009-05-28 Robert Eleazar Mendoza Active combustion control for a turbine engine
US20090217672A1 (en) * 2006-01-19 2009-09-03 Siemens Aktiengesellschaft Fuel Ratio Control in a Combustion Apparatus with Multiple Fuel Supply Lines
US20100300108A1 (en) * 2009-05-26 2010-12-02 Alstom Technologies, Ltd. Stabilizing a gas turbine engine via incremental tuning
EP2442031A1 (fr) * 2010-10-13 2012-04-18 Siemens Aktiengesellschaft Dispositif de combustion doté d'une alimentation en carburant à répartition pulsée
US20130173074A1 (en) * 2009-05-08 2013-07-04 Gas Turbine Efficiency Sweden Ab Automated tuning of multiple fuel gas turbine combustion systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090217672A1 (en) * 2006-01-19 2009-09-03 Siemens Aktiengesellschaft Fuel Ratio Control in a Combustion Apparatus with Multiple Fuel Supply Lines
US20090133379A1 (en) * 2007-11-28 2009-05-28 Robert Eleazar Mendoza Active combustion control for a turbine engine
US20130173074A1 (en) * 2009-05-08 2013-07-04 Gas Turbine Efficiency Sweden Ab Automated tuning of multiple fuel gas turbine combustion systems
US20100300108A1 (en) * 2009-05-26 2010-12-02 Alstom Technologies, Ltd. Stabilizing a gas turbine engine via incremental tuning
EP2442031A1 (fr) * 2010-10-13 2012-04-18 Siemens Aktiengesellschaft Dispositif de combustion doté d'une alimentation en carburant à répartition pulsée

Also Published As

Publication number Publication date
EP3105508B1 (fr) 2019-06-19
WO2015150099A1 (fr) 2015-10-08
EP3105508A1 (fr) 2016-12-21

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