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WO2019001947A1 - Procédé pour faire fonctionner un système de turbine à gaz - Google Patents

Procédé pour faire fonctionner un système de turbine à gaz Download PDF

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Publication number
WO2019001947A1
WO2019001947A1 PCT/EP2018/065486 EP2018065486W WO2019001947A1 WO 2019001947 A1 WO2019001947 A1 WO 2019001947A1 EP 2018065486 W EP2018065486 W EP 2018065486W WO 2019001947 A1 WO2019001947 A1 WO 2019001947A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling air
gas turbine
frequency
turbine
control device
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.)
Ceased
Application number
PCT/EP2018/065486
Other languages
German (de)
English (en)
Inventor
Fathi Ahmad
Tobias Buchal
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of WO2019001947A1 publication Critical patent/WO2019001947A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F02C9/16—Control of working fluid flow
    • F02C9/18—Control of working fluid flow by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • 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
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/76—Application in combination with an electrical generator
    • F05D2220/764—Application in combination with an electrical generator of the alternating current (A.C.) type
    • 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
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • 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
    • F05D2270/05—Purpose of the control system to affect the output of the engine
    • 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
    • F05D2270/11—Purpose of the control system to prolong engine life
    • 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
    • F05D2270/304—Spool rotational speed

Definitions

  • the invention relates to a method for operating a gas turbine plant comprising a gas turbine with a compressor and an expansion turbine, a driven by the gas turbine generator for generating a current with a predetermined desired frequency and a control device, wherein air from the compressor via Cooling air ducts of the expansion turbine is supplied as cooling air for cooling turbine components.
  • the invention further relates to a gas turbine installation comprising a gas turbine with a compressor and an expansion turbine, a generator driven by the gas turbine for generating a current with a predetermined desired frequency and a control device, wherein air from the compressor via cooling air lines in the expansion turbine as cooling air for cooling turbine components can be fed.
  • Methods are known for operating a gas turbine plant with a gas turbine and an electric generator.
  • the gas turbine is coupled to the generator via a common rotor shaft.
  • a fuel is burned into a hot gas in the gas turbine and converted into rotational energy in the rotor.
  • the gas turbine drives the generator via the rotor shaft, which then generates electricity at a fixed frequency.
  • the duration of the frequency deviations may be 5 minutes, but under certain circumstances may be significantly longer (eg 30 min), so that the total power of the power plant or the gas turbine plant is adversely affected.
  • frequency support - the gas turbine has to deliver more power. This is achieved, for example, by increasing the fuel supply of the gas turbine, which then provides the generator with more energy. However, by increasing the fuel supply, a hotter gas, which can lead to overfiring of the gas turbine. The gas components exposed to the gas can be damaged by the higher gas temperature.
  • the invention is therefore based on the object to propose an improved method for operating a gas turbine plant, which is characterized in particular by a lower lifetime consumption of the turbine components.
  • the object is achieved by a method for operating a gas turbine plant comprising a gas turbine with a compressor and an expansion turbine, a driven by the gas turbine generator for generating a current with a predetermined target frequency and a control device, wherein air from the compressor viade Kunststoffleii- tions of the expansion turbine is supplied as cooling air for cooling turbine components, wherein an actual frequency of the current is monitored by the control device over time and at a deviation of the actual frequency of the desired frequency, the control device generates a control signal through which the supply is reduced by cooling air to one or more of the turbine components.
  • a gas turbine plant comprising a gas turbine with a compressor and an expansion turbine, driven by the gas turbine generator for generating a current with a predetermined desired frequency and a control device, wherein air from the compressor via cooling air lines in the Expansion turbine as cooling air for cooling turbine components can be fed, wherein the control device with the desired frequency and an actual frequency is bespeisbar as input signals, and that upon detection of a deviation of the actual frequency of the desired frequency, the control device is set up for it to generate an actuating signal which reduces the supply of cooling air to one or more of the turbine components.
  • partial streams are taken within the compressor or at the compressor outlet and fed to a so-called secondary air system, which is used for cooling the turbine blading.
  • a so-called secondary air system which is used for cooling the turbine blading.
  • Such a system is described, for example, in WO 2015/178897.
  • several streams of cooling air from the compressor are led to the turbine stages via separate cooling air ducts in which valves for controlling the cooling air flow are installed. In this way, only part of the compressor intake mass flow flows through the combustion chamber as primary air.
  • the invention is based on the recognition that the cooling of the turbine components, in particular of the turbine blading, leads to a reduction of the thermal efficiency of the gas turbine, since the compressor air used for cooling can no longer participate as a primary air in the combustion process.
  • the invention provides that the cooling air supply is reduced at least to some of the turbine components in order to counteract the power losses caused by fluctuations in the generated grid frequency and thereby increase the efficiency of the gas turbine.
  • the short duration of the deviations from the nominal network frequency i.d.R., only a few minutes) has no significant negative effect on the service life of the affected turbine components.
  • the operating method according to the invention of a turbine system is thus distinguished by an improved service life consumption of the turbine components, in particular the turbine blading.
  • the supply of cooling air to a second stage of vanes is thus distinguished by an improved service life consumption of the turbine components, in particular the turbine blading.
  • the supply of cooling air is reduced by 50%, in particular by 30%, in particular in the range of 10-15%.
  • the reduction depends on the order of magnitude of the deviations of the current mains frequency from the nominal frequency and on which of the cooling air flows is throttled.
  • a 10-15% reduction in cooling air to the second or third vane stage over a period of less than 1 minute is sufficient to achieve approximately 1 MW of power recovery.
  • the cooling air ducts have valves and when the setpoint frequency is undershot, the valves are at least partially closed via the control signal.
  • Valves which are already present in the cooling air pipes of a secondary air system, represent the simplest technical means with which the cooling air flow can be influenced. For this purpose, only a coupling of the control device, which monitors the actual frequency of the electric current that can be generated by the generator, with the control of the valves is required.
  • FIG. 1 shows a gas turbine plant 1 comprising a gas turbine 2 with a rotor shaft 3, which is coupled to a generator 4.
  • a control device 5 serves to monitor the frequency of the current which is generated by the generator 4 during operation of the gas turbine plant 1.
  • the gas turbine 2 further comprises a compressor 7, a combustion chamber 8 and an expansion turbine 9. Driebes the gas turbine plant 1, the compressor 7 sucks air L and compresses them. The compressed air is passed as primary air to the combustion chamber 8, where it is mixed with a fuel B and burned to a flue gas RG. From the combustion chamber 8, the flue gas RG is guided to the expansion turbine 9, in which it relaxes in a pulse-transmitting manner on the rotor shaft 3 of the gas turbine plant 1 and drives it. The rotational energy of the rotor shaft 3 is supplied to the generator 4, which converts it into electrical energy in the form of an electric current having a predetermined frequency of 50 Hz or 60 Hz.
  • a portion of the compressed air L is taken from the compressor and fed via cooling air lines 14 of the expansion turbine 9 as cooling air K for cooling turbine blades, in particular the guide vanes, not shown here.
  • three cooling air ducts 14 are provided, which take cooling air K from different areas of the compressor 7 and feed it into different vane stages.
  • a valve 15 is integrated, via which the cooling air flow is regulated.
  • the valves 15 are controlled by the control device 5.
  • the control device 5 has two inputs 10, 11. At an input 10 is a setpoint value f 0 of the frequency and at the other input 11 a particular time-resolved actual value f (t) of the frequency of the generated current.
  • a frequency deviation of the actual value f (t) from the desired value f 0 can be detected by the control device 5.
  • the control device 5 can then generate at its output 12 an output signal which is fed as a control signal 16 to the valves 15 in order to regulate the cooling air flows. If the actual value f (t) of the frequency falls below the nominal value f 0l , the control device 5 generates an output signal which serves as a control signal 16 for the position of the valves 15, so that the amount of cooling air K, in particular to the second and / or the third stage of vanes is reduced. It is provided that the amount of deviation exceeds a threshold value ⁇ before the method for frequency support is initiated.
  • the flow of cooling air can vary depending on the vane level and how far the

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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)
  • Control Of Turbines (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un système (1) de turbine à gaz comportant une turbine à gaz (2) pourvue d'un compresseur (7) et d'une turbine de détente (9), un générateur (4) entraîné par la turbine à gaz (2) et destiné à produire un courant à une fréquence théorique (fo) prédéfinie, ainsi qu'un dispositif de commande (5), l'air (L) étant amené du compresseur (7) en passant par des conduites (14) d'air de refroidissement de la turbine de détente (9) sous la forme d'un air de refroidissement (K) destiné à refroidir les éléments de la turbine. Une fréquence réelle (f(t)) du courant est surveillée dans le temps et, lors d'un écart entre la fréquence réelle (f(t)) et la fréquence théorique (fo), le dispositif de commande (5) génère un signal de réglage (16) par l'intermédiaire duquel l'amenée d'air de refroidissement (K) à un ou plusieurs des éléments de turbine est réduite. Le rendement de la turbine à gaz (2) est augmenté par le fait que les pertes de puissance dues aux fluctuations de la fréquence de réseau produite sont contrecarrées.
PCT/EP2018/065486 2017-06-29 2018-06-12 Procédé pour faire fonctionner un système de turbine à gaz Ceased WO2019001947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017211010.4A DE102017211010A1 (de) 2017-06-29 2017-06-29 Verfahren zum Betrieb einer Gasturbinenanlage
DE102017211010.4 2017-06-29

Publications (1)

Publication Number Publication Date
WO2019001947A1 true WO2019001947A1 (fr) 2019-01-03

Family

ID=62750932

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/065486 Ceased WO2019001947A1 (fr) 2017-06-29 2018-06-12 Procédé pour faire fonctionner un système de turbine à gaz

Country Status (2)

Country Link
DE (1) DE102017211010A1 (fr)
WO (1) WO2019001947A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174606A2 (fr) * 2000-07-21 2002-01-23 Mitsubishi Heavy Industries, Ltd. Méthode de régulation pour une turbine à gaz
EP1507078A1 (fr) 2003-08-11 2005-02-16 Siemens Aktiengesellschaft Procédé de fonctionnement d'une installation de turbine à gaz et installation fonctionnant selon ce procédé
DE102008029941A1 (de) * 2007-10-16 2009-05-07 E.On Kraftwerke Gmbh Dampfkraftanlage und Verfahren zur Regelung der Leistung einer Dampfkraftanlage
EP2562369A1 (fr) * 2011-08-22 2013-02-27 Alstom Technology Ltd Méthode pour opérer une turbine à gaz et turbine à gaz pour exécuter la méthode
EP2594749A2 (fr) * 2011-11-15 2013-05-22 Hitachi Ltd. Turbine à gaz à deux arbres
WO2015178897A1 (fr) 2014-05-21 2015-11-26 Siemens Energy, Inc. Système de purge externe basé sur un éjecteur pour une turbine à gaz

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105587351B (zh) * 2008-03-25 2018-12-21 通用电器技术有限公司 发电站设备及其运行方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174606A2 (fr) * 2000-07-21 2002-01-23 Mitsubishi Heavy Industries, Ltd. Méthode de régulation pour une turbine à gaz
EP1507078A1 (fr) 2003-08-11 2005-02-16 Siemens Aktiengesellschaft Procédé de fonctionnement d'une installation de turbine à gaz et installation fonctionnant selon ce procédé
DE102008029941A1 (de) * 2007-10-16 2009-05-07 E.On Kraftwerke Gmbh Dampfkraftanlage und Verfahren zur Regelung der Leistung einer Dampfkraftanlage
EP2562369A1 (fr) * 2011-08-22 2013-02-27 Alstom Technology Ltd Méthode pour opérer une turbine à gaz et turbine à gaz pour exécuter la méthode
EP2594749A2 (fr) * 2011-11-15 2013-05-22 Hitachi Ltd. Turbine à gaz à deux arbres
WO2015178897A1 (fr) 2014-05-21 2015-11-26 Siemens Energy, Inc. Système de purge externe basé sur un éjecteur pour une turbine à gaz

Also Published As

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