EP2848774A1 - Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre - Google Patents

Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre Download PDF

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Publication number
EP2848774A1
EP2848774A1 EP13184821.0A EP13184821A EP2848774A1 EP 2848774 A1 EP2848774 A1 EP 2848774A1 EP 13184821 A EP13184821 A EP 13184821A EP 2848774 A1 EP2848774 A1 EP 2848774A1
Authority
EP
European Patent Office
Prior art keywords
speed
steam turbine
gas turbine
overspeed protection
steam
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Withdrawn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
EP13184821.0A
Other languages
German (de)
English (en)
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
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 EP13184821.0A priority Critical patent/EP2848774A1/fr
Priority to PL14766940T priority patent/PL3055515T3/pl
Priority to KR1020167009640A priority patent/KR101834101B1/ko
Priority to PCT/EP2014/069069 priority patent/WO2015039909A2/fr
Priority to EP14766940.2A priority patent/EP3055515B1/fr
Publication of EP2848774A1 publication Critical patent/EP2848774A1/fr
Withdrawn legal-status Critical Current

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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
    • F01D21/003—Arrangements for testing or measuring
    • 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

Definitions

  • the invention relates to a method for testing an overspeed protection device of a single-shaft system.
  • 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.
  • testing is 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 inventive method for testing an overspeed protection device of a gas turbine and a steam turbine having single shaft system comprises the following steps: a) providing a first speed measuring device for measuring the speed of the steam turbine, wherein the first speed measuring device at least one mounted on the shaft of the single-shaft system marker and a fixed scanning device by means of which the at least one marking is detectable when the marking is moved past the scanning device; b) increasing the number of marks of the first speed measuring device, whereby the speed measured by the first speed measuring device is higher than the actual speed; c) increasing the mass flow of the steam introduced into the steam turbine and / or the fuel introduced into the gas turbine such that the measured speed of the steam turbine 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 measured speed the steam turbine reaches the steam turbine limit speed; d) Check if the first overspeed protection is triggered.
  • the achievement of a critical speed can be advantageously avoided, whereby an excessive load of the single-shaft system is inhibited. Achieving the critical speed can be advantageously avoided even if during testing for the steam turbine limit speed the same steam turbine limit speed as in normal operation of the single-shaft system is used.
  • the method is easy to carry out, because starting from the normal operation for checking the overspeed protection device other than increasing the number of marks no further changes to the single-shaft system must be made.
  • the method comprises the steps of: e) coupling the steam turbine to the gas turbine such that the actual speed of the steam turbine corresponds to the actual speed of the gas turbine; f) increasing the mass flow of the steam introduced into the steam turbine and / or the fuel introduced into the gas turbine such that the measured speed of the gas turbine reaches a Gasurbinengrenzwertfitiere which is higher than the steam turbine limit speed, wherein the overspeed protection device is arranged such that a second overspeed protection is triggered when the measured speed of the gas turbine reaches the Gasurbinengrenzwertfitress; g) Check if the second overspeed protection is triggered.
  • the first overspeed protection and the second overspeed protection can be successively checked.
  • the method preferably comprises the steps of: a1) providing a second rotational speed measuring device for measuring the rotational speed of the gas turbine, the second rotational speed measuring device having at least one marking attached to the shaft of the single-shaft system and a stationary scanning device by means of which the at least one marking is detectable, when the marker is moved past the scanning device; b1) increasing the number of markings of the second speed measuring device, whereby the speed measured by the second speed measuring device becomes higher than the actual speed; e) increasing the mass flow of the steam introduced into the steam turbine and / or the fuel introduced into the gas turbine such that the measured speed of the gas turbine reaches a gas turbine limit speed which is higher than the steam turbine limit speed, wherein the overspeed protection device is set up such that a second overspeed protection is triggered as soon as the measured speed of the gas turbine reaches the gas turbine limit speed; f) Check if the second overspeed protection is triggered.
  • the first and the second overspeed protection can be checked irrespective of whether the steam turbine is coupled to the gas turbine or not. Due to the higher gas turbine limit speed compared to the steam turbine limit speed, the first and second overspeed protection can be checked sequentially and thus independently.
  • the steam turbine is coupled to the single-shaft system by means of a clutch, the clutch engaging as soon as the steam turbine would overtake the gas turbine and disengaging when the speed of the steam turbine is less than that of the gas turbine, step c) being performed is that the steam turbine is accelerated faster than the gas turbine, whereby the clutch remains engaged.
  • the gas turbine and the steam turbine thus rotate at the same speed, while the steam turbine accelerates to its steam turbine limit, and it is thus advantageously ensured that while the speed of the gas turbine does not reach a critical speed.
  • the method comprises the step of: d1) interrupting the mass flow of the steam introduced into the steam turbine in the event that the first overspeed protection is triggered.
  • d1 interrupting the mass flow of the steam introduced into the steam turbine in the event that the first overspeed protection is triggered.
  • it is also conceivable only to lower the mass flow of the steam so as to keep the speed of the steam turbine below a critical speed. Breaking or lowering the mass flow of the steam will cause the clutch to disengage and the gas turbine thus rotated independently of the steam turbine.
  • the second overspeed protection thus only the gas turbine is accelerated, whereby the load of the steam turbine is low.
  • the single-shaft system preferably has a generator to which no electrical load is connected.
  • the mechanical and thermal load of the single-shaft system during testing of the overspeed protection device is low.
  • this critical speeds can be avoided because a drop of the load can not be done, which would result in a sharp increase in the speed of the single-shaft system.
  • the method preferably comprises the step of: h) removing the markers added in steps b) and / or b1). Should this step be forgotten before the single-shaft system is operated again in normal operation after checking the overspeed protection device, this poses no safety risk, because the actual speed of the single-shaft system can not reach a critical speed.
  • 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 3 are used 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 5.
  • a separate generator shaft is provided, which is coupled by means of a coupling to the gas turbine shaft 5.
  • an electrical load 10 is connected by means of a switch 9 to an electrical terminal 8 of the generator 4.
  • the switch 9 is opened to test the overspeed protection device, so that no electrical load acts on the generator 4.
  • the steam turbine shaft 6 is connected to the gas turbine shaft 5 by means of a clutch 7.
  • the clutch 7 is arranged to engage when the steam turbine 3 overhauls the gas turbine 2, which means that the rotational speed of the steam turbine 3 is higher than the rotational speed of the gas turbine 2. Once the clutch 7 is engaged, the gas turbine 2 and the steam turbine 3 rotate at the same speed.
  • the clutch 7 is further arranged to disengage when the steam turbine 3 rotates slower than the gas turbine 2.
  • the clutch 7 may be, for example, an SSS clutch.
  • the gas turbine 2 When starting the one-shaft system 1, the gas turbine 2 is first accelerated, the clutch 7 is disengaged. The waste heat of the gas turbine 2 is used to drive the steam turbine 3. Once the steam turbine 3 is also accelerated, couples the clutch 7 a.
  • the single-shaft system has a first rotational speed measuring device for measuring the rotational speed of the steam turbine 3.
  • the first speed measuring device has at least one mark attached to the steam turbine shaft 6 and a fixed first scanning device by means of which the mark attached to the steam turbine shaft 6 is detectable when the mark is moved past the first scanning device.
  • the markings attached to the steam turbine shaft 6 are arranged such that their number can easily be increased or decreased. If the number of markings attached to the steam turbine shaft 6 is increased, but it is assumed that the number of markings applied to the steam turbine shaft 6 has remained the same when determining the rotational speed, the rotational speed measured by means of the first rotational speed measuring device is greater than the actual rotational speed.
  • the steam turbine shaft 6 may, for example, have a grooved wheel and the teeth or the grooves of the grooved wheel may be the markings.
  • the steam turbine shaft 6 may have ten strips.
  • two more strips are added, but in determining the speed it is assumed that there are only ten strips. If the first scanning device measures 600 strips per second and passes it, the result is a measured speed of 60 revolutions per second (60 Hz), with the actual speed being 50 revolutions per second (50 Hz).
  • the single-shaft system has a second rotational speed measuring device for measuring the rotational speed of the gas turbine 3.
  • the second speed measuring device has at least one marking attached to the gas turbine shaft 5 and a fixed second scanning device by means of which the marking attached to the gas turbine shaft 5 is detectable when it is moved past the second scanning device.
  • the second speed measuring device is set up analogously to the first speed measuring device.
  • 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.
  • the first overspeed protection for example, the mass flow of the steam can be interrupted.
  • the second overspeed protection the mass flow of the fuel can be interrupted.
  • the method for testing an overspeed protection device of a single shaft installation 1 having a gas turbine 2, a steam turbine 3 and a generator 4 to which no electrical load is connected is carried out with the following steps: a) providing a first speed measuring device for measuring the Speed of the steam turbine 3, wherein the first speed measuring device has at least one attached to the shaft 6 of the single-shaft system 1 marking in the form of teeth of a Nutrads the shaft 6 and a stationary scanning device by means of which the at least one tooth is detectable when the tooth on the scanning device is moved past; a1) coupling the steam turbine 3 to the gas turbine 2 such that the actual speed of the steam turbine 3 corresponds to the actual speed of the gas turbine 2; b) increasing the number of teeth of the first speed measuring device whereby the speed measured by the first speed measuring device becomes higher than the actual speed; c) increasing the mass flow of the steam introduced into the steam turbine 3 and / or the fuel introduced into the gas turbine 2 in such a way that the measured speed of the steam turbine 3 reaches a
  • the method for testing an overspeed protection device of a single shaft turbine 1 having a gas turbine 2, a steam turbine 3 and a generator 4 to which no electrical load is connected is coupled to the steam turbine shaft 6 by means of a clutch 7 to the gas turbine shaft wherein 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, with the following steps: a) providing a first speed measuring device for measuring the speed of the Steam turbine 3, wherein the first speed measuring device has at least one attached to the steam turbine shaft 6 of the single-shaft system 1 marker and a fixed first scanning, by means of which the at least one mark is detectable when the attached to the steam turbine shaft 6 mark on the first scanning vorb is moved; a1) providing a second speed measuring device for measuring the rotational speed of the gas turbine 2, wherein the second speed measuring device at least one attached to the gas turbine shaft 5 of the single-shaft system 1 marker and a fixed second scanning device, by means of which
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
EP13184821.0A 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre Withdrawn EP2848774A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP13184821.0A EP2848774A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre
PL14766940T PL3055515T3 (pl) 2013-09-17 2014-09-08 Sposób kontroli urządzenia do ochrony przed nadobrotami układu jednowałowego
KR1020167009640A KR101834101B1 (ko) 2013-09-17 2014-09-08 단축 시스템의 과속도 보호 장치의 검사 방법
PCT/EP2014/069069 WO2015039909A2 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre
EP14766940.2A EP3055515B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13184821.0A EP2848774A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre

Publications (1)

Publication Number Publication Date
EP2848774A1 true EP2848774A1 (fr) 2015-03-18

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP13184821.0A Withdrawn EP2848774A1 (fr) 2013-09-17 2013-09-17 Procédé de contrôle d'un dispositif de protection contre le surrégime d'une installation à un arbre
EP14766940.2A Not-in-force EP3055515B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP14766940.2A Not-in-force EP3055515B1 (fr) 2013-09-17 2014-09-08 Procédé pour vérifier un dispositif de protection contre le surrégime d'une installation mono-arbre

Country Status (4)

Country Link
EP (2) EP2848774A1 (fr)
KR (1) KR101834101B1 (fr)
PL (1) PL3055515T3 (fr)
WO (1) WO2015039909A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3232015A1 (fr) * 2016-04-12 2017-10-18 Siemens Aktiengesellschaft Chaîne cinématique de turbomachine et procédé de couplage de la chaîne cinématique de turbomachine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952500B (zh) * 2016-07-15 2017-08-08 重庆红江机械有限责任公司 一种柴油机安全保护装置
CN114352361B (zh) * 2022-01-24 2023-10-27 重庆江增船舶重工有限公司 一种汽轮机危急遮断器组件超速试验工具及其使用方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199256A (en) * 1989-01-26 1993-04-06 General Electric Company Overspeed protection for a gas turbine/steam turbine combined cycle
EP2372108A2 (fr) * 2010-03-23 2011-10-05 General Electric Company Procédé et système pour tester le système de protection contre l'excès de vitesse d'une machine de centrale électrique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199256A (en) * 1989-01-26 1993-04-06 General Electric Company Overspeed protection for a gas turbine/steam turbine combined cycle
EP2372108A2 (fr) * 2010-03-23 2011-10-05 General Electric Company Procédé et système pour tester le système de protection contre l'excès de vitesse d'une machine de centrale électrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3232015A1 (fr) * 2016-04-12 2017-10-18 Siemens Aktiengesellschaft Chaîne cinématique de turbomachine et procédé de couplage de la chaîne cinématique de turbomachine
WO2017178185A1 (fr) * 2016-04-12 2017-10-19 Siemens Aktiengesellschaft Ligne de turbomachines et procédé d'accouplement de la ligne de turbomachines
CN109072709A (zh) * 2016-04-12 2018-12-21 西门子股份公司 涡轮机系和用于耦联涡轮机系的方法

Also Published As

Publication number Publication date
KR20160055878A (ko) 2016-05-18
KR101834101B1 (ko) 2018-03-02
PL3055515T3 (pl) 2018-04-30
EP3055515A2 (fr) 2016-08-17
EP3055515B1 (fr) 2017-11-01
WO2015039909A3 (fr) 2015-05-28
WO2015039909A2 (fr) 2015-03-26

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