EP3022402B1 - Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre - Google Patents

Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre Download PDF

Info

Publication number
EP3022402B1
EP3022402B1 EP14771808.4A EP14771808A EP3022402B1 EP 3022402 B1 EP3022402 B1 EP 3022402B1 EP 14771808 A EP14771808 A EP 14771808A EP 3022402 B1 EP3022402 B1 EP 3022402B1
Authority
EP
European Patent Office
Prior art keywords
speed
steam turbine
overspeed protection
shaft system
gas turbine
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.)
Not-in-force
Application number
EP14771808.4A
Other languages
German (de)
English (en)
Other versions
EP3022402A2 (fr
Inventor
Martin Ophey
Thorsten Engler
Susanne Haas
Andreas Pahl
Marian-Peter Pieczyk
Martin Stapper
David Veltmann
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
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
Priority to EP14771808.4A priority Critical patent/EP3022402B1/fr
Priority to PL14771808T priority patent/PL3022402T3/pl
Publication of EP3022402A2 publication Critical patent/EP3022402A2/fr
Application granted granted Critical
Publication of EP3022402B1 publication Critical patent/EP3022402B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/02—Shutting-down responsive to overspeed
    • 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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/003—Arrangements for testing or measuring

Definitions

  • the invention relates to a method for testing an overspeed protection device of a single-shaft system.
  • a method for example from the EP-A-2 372 108 known.
  • a gas turbine, a steam turbine and a generator are arranged on a common strand.
  • the electrical energy is fed into an electrical network and the strand rotates at a speed corresponding to the rated speed of the single-shaft system, such as 50 Hz or 60 Hz.
  • the speed may increase to levels above the rated speed.
  • the single-shaft system is mechanically and thermally loaded excessively, resulting in a shortening of the life of the single-shaft system.
  • an overspeed protection device prevents further increase in the speed of the train, the limit speed being conventionally selected to be between the rated speed and the critical speed.
  • the overspeed protection device is checked by operating the single-shaft system in a test mode in which the threshold speed is lowered from the threshold speed during normal operation to thereby avoid excessive load on the single-shaft system during test operation.
  • test mode it would be desirable in test mode to use the same limit speed as in normal operation. Such a test is also compulsory in some countries, such as South Korea.
  • the object of the invention is to provide a method for testing an overspeed protection device of a single-shaft system, wherein the method does not lead to an excessive load on the single-shaft system.
  • the method according to the invention for testing an overspeed protection device of a single-shaft turbine having a gas turbine and a steam turbine comprises the steps of: b) operating the single-shaft system such that no steam is conducted into the steam turbine and the gas turbine drives the steam turbine; c) increasing the mass flow of the fuel introduced into the gas turbine such that the speed of the single-shaft system reaches a steam turbine limit speed, wherein the overspeed protection device is arranged such that a first overspeed protection is triggered as soon as the speed of the single-shaft system reaches the steam turbine limit speed; d) Check if the first overspeed protection is triggered.
  • the thermal load on the steam turbine during testing of the overspeed protection device is low, which gives the single-shaft system a long service life.
  • the method is easy to carry out because only the mass flow of the fuel introduced into the gas turbine is controlled in order to reach the steam turbine limit value speed.
  • the method preferably comprises the step of: a) evacuating the steam turbine. If there is a gas in the steam turbine during testing of the overspeed protection device, this is set in motion by the rotor of the steam turbine, which results in a release of so-called ventilation heat.
  • the ventilation heat can lead to a strong thermal load of the steam turbine, the strong thermal load leads to a shortening of the life of the steam turbine.
  • the single-shaft system preferably has a generator to which no electrical load is connected.
  • the steam turbine limit speed and the gas turbine limit speed may advantageously be slowed down and a critical speed of the single shaft system advantageously avoided.
  • excessive mechanical and thermal loading of the single-shaft system during testing of the overspeed protection device can be avoided, whereby the life of the single-shaft system is long.
  • the excessive load can be avoided with the method according to the invention even if the gas engine limit value speed and the steam turbine limit value speed the same limit speeds are used as in normal operation of the single-shaft system.
  • FIG. 1 shows a schematic view of a single-shaft system.
  • a single-shaft system 1 has a gas turbine 2, a steam turbine 3 and an electric generator 4.
  • the gas turbine 2 and the steam turbine 4 serve to generate rotational energy, wherein the rotational energy is converted in the generator 4 into electrical energy.
  • the generator 4 is arranged between the gas turbine 2 and the steam turbine 3.
  • the gas turbine 2 has a gas turbine shaft 5 and the steam turbine 3 has a steam turbine shaft 6.
  • the generator 4 and the gas turbine 2 are arranged together on the steam turbine shaft 6.
  • a separate generator shaft is provided for the generator 4, which is coupled by means of a coupling to the gas turbine shaft 5.
  • the figure shows that the steam turbine shaft 6 is connected to the gas turbine shaft 5 by means of a clutch 7.
  • the clutch 7 is arranged such that the clutch 7 engages as soon as the steam turbine 3 overhauls the gas turbine 2, and disengages when the speed of the steam turbine 3 is smaller than that of the gas turbine 2.
  • the clutch 7 may be, for example, an SSS clutch.
  • the clutch 7 is changed so that the gas turbine 2 can drive the steam turbine 3, so that the gas turbine 2 and the steam turbine 3 rotate at the same speed. This can be done, for example, that the clutch 7 is mechanically blocked.
  • the clutch 7 is removed and replaced by an intermediate shaft, by means of which the gas turbine shaft 5 and the steam turbine shaft 6 are firmly connected to each other.
  • the single-shaft system 1 has an overspeed protection device.
  • the overspeed protection device is configured such that a first overspeed protection is triggered when the speed of the steam turbine 3 reaches a steam turbine limit speed, and a second overspeed protection is triggered when the speed of the gas turbine 2 reaches a Gasurbinengrenzwertfitiere.
  • a first overspeed protection is triggered when the speed of the steam turbine 3 reaches a steam turbine limit speed
  • a second overspeed protection is triggered when the speed of the gas turbine 2 reaches a Gasurbinengrenzwertfitiere.
  • the method for testing an overspeed protection device of a single-shaft plant 1 having a gas turbine 2, a steam turbine 3 and a generator 4 to which no electric load is connected is carried out with the steps of: a) evacuating the steam turbine 3; a1) engaging the clutch; b) Operating the single-shaft system 1 such that no steam is conducted into the steam turbine 3 and the vacuum in the steam turbine 3 is maintained and the gas turbine 2 drives the steam turbine 3, so that the gas turbine 2 and the steam turbine 3 rotate at the same speed ; c) increasing the mass flow of the introduced into the gas turbine 2 fuel such that the speed of the single-shaft system 1 is a steam turbine limit speed achieved, wherein the overspeed protection device is arranged such that a first overspeed protection is triggered when the speed of the single-shaft system 1 reaches the steam turbine limit speed; d) Check if the first overspeed protection is triggered.
  • the steam turbine limit speed may be 106 to 108% of the rated speed and the gas turbine limit speed may be 0.1 to 0.5% greater than the steam turbine limit speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)

Claims (4)

  1. Procédé de contrôle d'un dispositif de protection vis-à-vis du surrégime d'une installation (1) mono-arbre ayant une turbine (2) à gaz et une turbine (3) à vapeur, comprenant les stades :
    b) on fait fonctionner l'installation (1) mono-arbre de manière à ne pas envoyer de vapeur dans la turbine (3) à vapeur et de manière à ce que la turbine (2) à gaz entraîne la turbine (3) à vapeur ;
    c) on augmente le courant massique du combustible envoyé à la turbine (2) à gaz, de manière à ce que le régime de l'installation (1) mono-arbre atteigne un régime de valeur limite de la turbine à vapeur, le dispositif de protection vis-à-vis du surrégime étant conçu de manière à déclencher une première protection vis-à-vis d'un surrégime dès que le régime de l'installation (1) mono-arbre atteint le régime de valeur limite de la turbine à vapeur ;
    d) on contrôle si la première protection vis-à-vis d'un surrégime est déclenchée.
  2. Procédé suivant la revendication 1,
    comprenant les stades :
    e) augmentation du courant massique du combustible introduit dans la turbine (2) à gaz, de manière à ce que le régime de l'installation (1) mono-arbre atteigne un régime de valeur limite de la turbine à gaz, qui est plus grand que le régime de valeur limite de la turbine à vapeur, le dispositif de protection vis-à-vis du surrégime étant conçu de manière à déclencher une deuxième protection vis-à-vis du surrégime dès que le régime de l'installation (1) mono-arbre atteint le régime de valeur limite de la turbine à gaz ;
    f) contrôle si la deuxième protection vis-à-vis du surrégime est déclenchée.
  3. Procédé suivant la revendication 1 ou 2,
    comprenant le stade :
    a) mise sous vide de la turbine (3) à vapeur.
  4. Procédé suivant une des revendications 1 ou 3,
    dans lequel l'installation (1) mono-arbre a une génératrice (4) à laquelle une charge électrique n'est pas raccordée.
EP14771808.4A 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre Not-in-force EP3022402B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14771808.4A EP3022402B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre
PL14771808T PL3022402T3 (pl) 2013-09-17 2014-09-08 Sposób kontroli urządzenia chroniącego przed nadmierną prędkością obrotową instalacji jednowałowej

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13184814.5A EP2848771A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre
PCT/EP2014/069068 WO2015039908A2 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre
EP14771808.4A EP3022402B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre

Publications (2)

Publication Number Publication Date
EP3022402A2 EP3022402A2 (fr) 2016-05-25
EP3022402B1 true EP3022402B1 (fr) 2017-08-16

Family

ID=49182151

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13184814.5A Withdrawn EP2848771A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre
EP14771808.4A Not-in-force EP3022402B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13184814.5A Withdrawn EP2848771A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre

Country Status (4)

Country Link
EP (2) EP2848771A1 (fr)
KR (1) KR101834098B1 (fr)
PL (1) PL3022402T3 (fr)
WO (1) WO2015039908A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112664284A (zh) * 2020-12-24 2021-04-16 上海电气电站设备有限公司 基于汽轮机运行的保护系统及保护方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301499A (en) * 1990-06-28 1994-04-12 General Electric Company Overspeed anticipation and control system for single shaft combined cycle gas and steam turbine unit
JP3930462B2 (ja) * 2003-08-01 2007-06-13 株式会社日立製作所 一軸コンバインドサイクル発電設備及びその運転方法
US8365583B2 (en) * 2010-03-23 2013-02-05 General Electric Company Method and system for testing an overspeed protection system of a powerplant machine
US8756939B2 (en) * 2010-03-23 2014-06-24 General Electric Company Method and system for testing an overspeed protection system of a powerplant machine
FR2962165B1 (fr) * 2010-07-02 2014-05-02 Turbomeca Detection de survitesse d'une turbine libre par mesure sur couplemetre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL3022402T3 (pl) 2018-01-31
WO2015039908A3 (fr) 2015-05-28
KR20160042448A (ko) 2016-04-19
EP3022402A2 (fr) 2016-05-25
EP2848771A1 (fr) 2015-03-18
WO2015039908A2 (fr) 2015-03-26
KR101834098B1 (ko) 2018-03-02

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