EP2417395A2 - Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz - Google Patents

Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz

Info

Publication number
EP2417395A2
EP2417395A2 EP10713903A EP10713903A EP2417395A2 EP 2417395 A2 EP2417395 A2 EP 2417395A2 EP 10713903 A EP10713903 A EP 10713903A EP 10713903 A EP10713903 A EP 10713903A EP 2417395 A2 EP2417395 A2 EP 2417395A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
gas turbine
tendency
stability parameter
value
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.)
Granted
Application number
EP10713903A
Other languages
German (de)
English (en)
Other versions
EP2417395B1 (fr
Inventor
Malte Blomeyer
Eberhard Deuker
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 EP10713903.2A priority Critical patent/EP2417395B1/fr
Publication of EP2417395A2 publication Critical patent/EP2417395A2/fr
Application granted granted Critical
Publication of EP2417395B1 publication Critical patent/EP2417395B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • 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 invention relates to a method for analyzing the tendency to hum of a combustion chamber and a method for controlling the operation of a gas turbine with a combustion chamber, provided that hum of the combustion chamber is prevented.
  • combustion oscillations may occur. The occurrence of
  • Combustion vibration is also known as "combustion chamber hum.”
  • the combustor of the gas turbine tends to hum when the gas turbine is operated at a high turbine inlet temperature to achieve high thermal efficiency of the gas turbine.
  • the high turbine inlet temperature can be achieved by a correspondingly high combustion temperature in the combustion chamber, whereby the combustion chamber tends to hum.
  • Combustion vibrations are based on an interaction of the combustion air / fuel mixture flowing in the combustion chamber with the instantaneous combustion conversion in the flame.
  • the combustion vibrations cause increased mechanical and thermal stress on the combustion chamber structure and its suspension.
  • the combustion vibrations can suddenly occur in such a Intensity occur that the combustion chamber structure itself or other components of the gas turbine can be damaged.
  • the gas turbine is conventionally relieved of a high load gradient, thereby adversely reducing gas turbine output.
  • Remedy is the operation of the gas turbine with sufficient distance from the limit of self-excited combustion oscillations.
  • the limit of the self-excited combustion vibrations can unfavorably shift, so that for the most unfavorable environmental conditions, a sufficient distance from the limit of self-excited combustion vibrations must be maintained. It is disadvantageous that thus the upper power range of the gas turbine must be excluded and can not be driven.
  • the object of the invention is to provide a method for analyzing the rumble tendency of a combustion chamber, a method for controlling an operation of a gas turbine with a combustion chamber and a control device for controlling an operation of a gas turbine, the method being able to effectively operate the combustion chamber with sufficiently low rumbling tendency ,
  • the method according to the invention for analyzing the rumble tendency of a combustion chamber in an operating state comprises the steps of: operating the combustion chamber in the operating state; Detecting a thermoacoustic size of the
  • Combustion chamber is operated in an operating state with just yet permissible high Brummneist, the stability parameter is in this operating state on one of the thresholds; Quantify the rumble slope using the lower distance value and / or the upper distance value.
  • the threshold values can be selected depending on the operating and ambient conditions.
  • the magnitude of the amplitude values of the parameter changes moderately with the burning load of the combustion chamber and is only of limited significance for the purpose of
  • the stability parameter is calculated with the ratio value from the division of the amplitude value of the first resonance and the amplitude value of the second resonance.
  • the stability parameter is formed as the logarithm of the ratio. Further, it is preferable that the stability parameter is attenuated over time with a damping function. In this way, excessive transient changes in the stability parameter can advantageously be contained.
  • an attenuation function may be formed such that at a time instant n the stability parameter is formed from the arithmetic mean of the ratio value at time n and the ratio value at time n-1.
  • the characteristic is measured at the same time and for each site the local spectrum is determined, the local spectra having an envelope used as the spectrum.
  • the spectrum formed by the envelope is the entire possibly determined by spatial inhomogeneities operating state of Combustion chamber represents.
  • the combustion chamber is preferably designed as an annular combustion chamber rotationally symmetrical about an axis and has a plurality of points at which the parameters are measured, wherein the number of measuring points is reduced by utilizing the symmetry of vibration modes.
  • the parameter is the sound pressure in the combustion chamber and / or the acceleration of the combustion chamber structure.
  • the method according to the invention for controlling an operation of a gas turbine with a combustion chamber comprises the steps of: performing the previous method for analyzing the tendency to hum of the combustion chamber of the gas turbine during its operation; once the quantification of the rumble tendency indicates that the stability parameter has reached at least one of the threshold values, reducing the output power of the gas turbine.
  • the stability parameter can be used directly as a controlled variable for operating the gas turbine.
  • the instantaneous load of the gas turbine is directly correlated to the stability parameter, so that with the stability parameter, a power control of the gas turbine with regard to the avoidance of the hum of the combustion chamber can be accomplished.
  • the method of controlling the operation of the gas turbine further includes the step of: once the quantification of the rumble tendency indicates that the stability parameter has reached a predetermined distance value to at least one of the threshold values, controlling the operation of the gas turbine to reduce the rumble tendency.
  • the turbine outlet temperature is reduced by changing the compressor air mass flow into the combustion chamber as a manipulated variable compared to their target value and / or the temperature of the fuel is changed in the combustion chamber as a control variable to its desired value and / or spatial distribution of the fuel supply to the combustion chamber as a manipulated variable is changed from its desired value and / or - if more than one burner stages are available - the division is changed to different burner stages as a manipulated variable to its desired value.
  • the manipulated variable is preferably reset to its desired value.
  • the method of controlling the operation of the gas turbine comprises the step of, once the quantification of the rumble tendency indicates that the stability parameter has reached a predetermined and low rumble-defining distance value to at least one of the thresholds, controlling the operation of the gas turbine such that the operation the gas turbine is optimized in particular with regard to output power, emission and / or fuel consumption.
  • a control device for controlling an operation of a gas turbine is set up to carry out the aforementioned method.
  • Figure 2 is a diagram of the time course of a
  • FIG. 4 shows a diagram of a control curve for the gas turbine with power increase.
  • the parameter is the sound pressure in a combustion chamber, which occurs during operation of the combustion chamber.
  • the sound pressure in the combustion chamber can be measured, for example, with one or more microphones in the combustion chamber.
  • the spectrum 1 results when the Brummneist the combustion chamber is low. If the operating state of the combustion chamber is changed in such a way that the tendency to humming increases, the spectrum 1 changes into the spectrum 1 '. If the operating state of the combustion chamber is further changed, that the rumbling tendency increases and reaches a just yet permissible limit range, the spectrum 1 'changes into the spectrum 1 ".As a first resonance, the spectra 1, 1', 1" first amplitude maximum 2, 2 ', 2 "and as a second resonance a second amplitude maximum 3, 3', 3" on.
  • FIG. 2 shows a coordinate system over whose abscissa 8 the time from 0 to 2 minutes is plotted.
  • the left ordinate 6 is the stability parameter and the right ordinate 7 is a turbine outlet temperature.
  • the curve 10 of the turbine outlet temperature is 579 0 C. This results in the operating state in the combustion chamber, in which the
  • Stability parameter 6 with 0.3, as shown in the course curve 9 at time 0.75 minutes in FIG. Finally, the course of the turbine outlet temperature 10 is raised to a first level 11. As shown in FIG. 2, the course 9 of the stability parameter 6 is decreasing over time, which is an indication of the combustion chamber's tendency to increase over time.
  • FIG. 2 also shows the course of the acceleration 14 of the combustion chamber structure, which is essentially constant until the turbine outlet temperature 10 is raised to the first level 11. If the turbine outlet temperature 10 is increased to a second level 12, then the course 9 of the stability parameter 6 continues to drop and, in the combustion chamber, finally, hum occurs.
  • the hum has the consequence that with it self-excited combustion vibrations the
  • Combustion structure is strongly vibrated, causing the acceleration increases 14 to an acceleration peak 15 abruptly.
  • the acceleration tip 15 is so high that damage to the combustion chamber structure is to be expected. Therefore, in order to prevent damage to the combustor structure, the gas turbine is shut down, as shown by a rapid drop in the curve 10 of the turbine exit temperature in FIG.
  • a threshold value 16 of the stability parameter 6 is plotted at 0.1.
  • the course 9 of the stability parameter 6 falls below (drawn in FIG. 2 by 17) the threshold value 16 at a first time 18, which is 1.55 minutes.
  • the first time 18 is advanced 15 seconds from the second point in time 19, when the acceleration peak 15 occurs. If, during operation of the gas turbine, the threshold value 16 is fallen below the stability parameter 6, a response time of 15 seconds remains, according to FIG. 2, during which the operation of the gas turbine is to be changed with a view to weakening the rumble tendency, such that the hum of the combustion chamber and thus the resulting rapid shutdown of the gas turbine can be avoided.
  • FIGS. 3 and 4 are similar to the diagram in FIG. 2 and show an operation of the gas turbine with the proviso of preventing hum of the combustion chamber.
  • the Brummneist the combustion chamber may increase, for example, that decreases in a compressor of the gas turbine due to wear or contamination, the pressure ratio. Further, the Brummneist the combustion chamber may increase by the fact that the ambient temperature and thus the compressor inlet temperature increases during operation of the gas turbine. For example, be the gas turbine at a level of
  • Turbine exit temperature operated, as it shows the trajectory 10 at the origin of the abscissa in FIG. Caused by, for example, one of the aforementioned Influences increase the Brummne Trent the combustion chamber, so that the course 9 of the stability parameter 6 drops. Without intervention in the operation of the gas turbine, this process would continue until eventually the combustion chamber starts to hum.
  • a second threshold value 16 ' is plotted at 0.2, which lies above the first threshold value 16 (threshold value 16 at 0.1).
  • the fuel supply into the combustion chamber is reduced at a third time 20 by means of a control device for the gas turbine such that the curve 10 of the turbine outlet temperature within 3 seconds at the fourth time 21 7 lowers by 1 Kelvin.
  • Stability parameter 6 braked and vice versa, so that finally the trajectory 9 of the stability parameter 6 exceeds the threshold 16 'again at the fifth time 22.
  • the lowering of the turbine outlet temperature 7 by 1 Kelvin was not sufficient to achieve a sufficiently large distance to the hum of the combustion chamber, so falls after the fifth time 22, the curve 9 of the stability parameter 6 again and falls below the threshold 16 '.
  • Turbine exit temperature 7 is lowered again by 1 Kelvin, which in turn slows down the course 9 of the stability parameter 6 and vice versa, until finally the curve 9 of the stability parameter 6 has exceeded the threshold value 16 '.
  • Turbine outlet temperature 7 can be raised in its course 10 back to the original level.
  • Stability parameter 6 such that it comes to reaching the threshold value 16 at 0.1, which would be carried out at this shortfall 17 an emergency shutdown of the gas turbine.
  • the drop of the curve 9 of the stability parameter 6 is decelerated and vice versa, so that finally the curve 9 of the stability parameter 6 exceeds the threshold value 16 'at 0.2 and thereafter the threshold value 16 " 0.4, so that the turbine outlet temperature 7 can be traced over the course 10 shown in FIG. 4 to the correspondingly required level 10 ', whereby the tendency to hum of the combustion chamber always remains so low in that an emergency shutdown of the gas turbine need not be made.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Testing Of Engines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Un procédé d'analyse de la tendance au ronflement d'une chambre de combustion en état de fonctionnement présente les étapes suivantes : mise en fonctionnement de la chambre de combustion en état de fonctionnement; saisie d'une grandeur thermoacoustique du volume de gaz de la chambre de combustion et/ou d'une grandeur de vibration de la structure de la chambre de combustion en état de fonctionnement et détermination d'une grandeur caractéristique à partir de la grandeur thermoacoustique et/ou de la grandeur de vibration; détermination du spectre (1, 1', 1'') des grandeurs caractéristiques en état de fonctionnement en tant que variation de l'amplitude de la grandeur caractéristique au cours du temps; identification d'une première résonance et d'une deuxième résonance de la grandeur caractéristique à l'aide du spectre (1, 1', 1''); détermination de la valeur d'amplitude (2, 2', 2'') de la première résonance et de la valeur d'amplitude (3, 3', 3'') de la deuxième résonance; calcul d'un paramètre de stabilité (9, 9') comme fonction de la valeur d'amplitude (2, 2', 2'') de la première résonance et de la valeur d'amplitude (3, 3', 3'') de la deuxième résonance; détermination de la valeur d'écart inférieur et/ou de la valeur d'écart supérieur, auxquelles le paramètre de stabilité (9, 9') se situe au-delà d'une valeur seuil inférieure prédéterminée (16) et/ou en deçà d'une valeur seuil supérieure prédéterminée, la valeur seuil (16) étant choisie de sorte que lorsque la chambre de combustion en état de fonctionnement fonctionne avec une tendance au ronflement juste supérieure à ce qui est toléré, le paramètre de stabilité (9, 9') se situe dans cet état de fonctionnement à l'une des valeurs seuil (16); et quantification de la tendance au ronflement au moyen de l'écart inférieur et/ou de l'écart supérieur.
EP10713903.2A 2009-04-08 2010-04-07 Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz Active EP2417395B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10713903.2A EP2417395B1 (fr) 2009-04-08 2010-04-07 Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09157596A EP2239505A1 (fr) 2009-04-08 2009-04-08 Procédé d'analyse de la tendance d'une chambre de combustion à émettre des bruits à basse fréquence et procédé de commande d'une turbine à gaz
PCT/EP2010/054585 WO2010115921A2 (fr) 2009-04-08 2010-04-07 Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz
EP10713903.2A EP2417395B1 (fr) 2009-04-08 2010-04-07 Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz

Publications (2)

Publication Number Publication Date
EP2417395A2 true EP2417395A2 (fr) 2012-02-15
EP2417395B1 EP2417395B1 (fr) 2018-09-05

Family

ID=41010879

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09157596A Withdrawn EP2239505A1 (fr) 2009-04-08 2009-04-08 Procédé d'analyse de la tendance d'une chambre de combustion à émettre des bruits à basse fréquence et procédé de commande d'une turbine à gaz
EP10713903.2A Active EP2417395B1 (fr) 2009-04-08 2010-04-07 Procédé d'analyse de la tendance au ronflement d'une chambre de combustion et procédé de commande d'une turbine à gaz

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09157596A Withdrawn EP2239505A1 (fr) 2009-04-08 2009-04-08 Procédé d'analyse de la tendance d'une chambre de combustion à émettre des bruits à basse fréquence et procédé de commande d'une turbine à gaz

Country Status (5)

Country Link
EP (2) EP2239505A1 (fr)
CN (1) CN102713438B (fr)
ES (1) ES2700444T3 (fr)
RU (1) RU2548233C2 (fr)
WO (1) WO2010115921A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2520863B1 (fr) * 2011-05-05 2016-11-23 General Electric Technology GmbH Procédé de protection d'un moteur à turbine à gaz contre des valeurs de processus dynamique élevées et moteur de turbine à gaz pour l'exécution de ce procédé
EP3045676A1 (fr) 2015-01-13 2016-07-20 Siemens Aktiengesellschaft Procédé destiné à éviter un détachement de courant rotatif
EP3101343A1 (fr) * 2015-06-05 2016-12-07 Siemens Aktiengesellschaft Procede de commande intelligent avec des seuils variables sur la base des lectures de vibration
RU2618774C1 (ru) * 2016-01-11 2017-05-11 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Уфимский государственный авиационный технический университет" Способ контроля вибрационного горения в камере сгорания газотурбинного двигателя
DE102019204422A1 (de) 2019-03-29 2020-10-01 Siemens Aktiengesellschaft Vorhersage einer Verbrennungsdynamik einer Gasturbine

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Also Published As

Publication number Publication date
RU2011145037A (ru) 2013-05-20
WO2010115921A2 (fr) 2010-10-14
ES2700444T3 (es) 2019-02-15
WO2010115921A3 (fr) 2013-03-14
EP2417395B1 (fr) 2018-09-05
RU2548233C2 (ru) 2015-04-20
CN102713438B (zh) 2014-09-10
CN102713438A (zh) 2012-10-03
EP2239505A1 (fr) 2010-10-13

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