EP3022401A2 - Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlage - Google Patents
Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlageInfo
- Publication number
- EP3022401A2 EP3022401A2 EP14766939.4A EP14766939A EP3022401A2 EP 3022401 A2 EP3022401 A2 EP 3022401A2 EP 14766939 A EP14766939 A EP 14766939A EP 3022401 A2 EP3022401 A2 EP 3022401A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- steam turbine
- overspeed protection
- gas turbine
- 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.)
- Granted
Links
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 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 limit speed is lowered from the limit speed during normal operation to thereby avoid excessive load on the single-shaft system during test operation.
- 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 system comprising a gas turbine and a steam turbine, which has a coupling by means of which the steam turbine can be coupled to the single-shaft system, comprises the steps of: a) disengaging the clutch; b) operating the gas turbine and the steam turbine at their nominal speed; c) increasing the mass flow of steam introduced into the steam turbine such that the speed of the steam turbine reaches a steam turbine limit speed, the overspeed protection device being arranged to initiate a first overspeed protection when the speed of the steam turbine reaches the steam turbine limit speed; d) Check if the first overspeed protection is triggered.
- the disengagement of the clutch can be done by the clutch mechanically rebuilt or removed at standstill of the single-shaft system.
- the coupling is hydraulically or electrically disengaged.
- the steam turbine can advantageously rotate at a higher speed than the gas turbine.
- the gas turbine can rotate at such a low rotational speed that the gas turbine is not excessively loaded, as a result of which a long service life of the gas turbine can be achieved with the method according to the invention.
- the steam turbine is not coupled to the generator so that a possible discharge of an electrical load connected to the generator will not result in an increase in the speed of the steam turbine.
- the critical speed of the steam turbine can be avoided even if, when testing the overspeed protection device, the same steam turbine limit speed as in normal operation of the single-shaft system is used.
- the method is preferably performed with the step: dl) interrupting the mass flow of steam introduced into the steam turbine in the event that the first overspeed protection is triggered. Because the clutch is disengaged, interrupting the mass flow will not affect the gas turbine, which will interfere with the test during the test
- Overspeed protection device can be operated independently of the steam turbine.
- the method comprises the steps: e) increasing the speed of the gas turbine such that the speed of the
- Gas turbine reaches a GasurbinengrenzwertFiere, wherein the overspeed protection device is arranged such that a second overspeed protection is triggered when the speed of the gas turbine reaches the GasturbinengrenzwertFiere; f) Check if the second overspeed protection is triggered.
- the first and second overspeed protection can be independently tested.
- the gas turbine limit speed and the steam turbine limit speed may be selected independently of each other. Thus, it is possible to select the gas turbine limit speed greater than, equal to or less than the steam turbine limit speed.
- the single-shaft system has a generator to which an electrical load is connected and step e) is carried out by dropping the electrical load.
- step e) is preferably carried out by increasing the mass flow of the fuel introduced in the gas turbine. It is preferred that an electrical load is connected to the generator, which is selected so low that after a drop in the load, the speed of the gas turbine increases so that it remains below the Gasturbinengrenzwertfitiere, and step e) by increasing the mass flow of in Gas turbine introduced fuel takes place. If the gas turbine limit value is reached by increasing the mass flow of the fuel, then the gas turbine limit value can be approached slowly, whereby the achievement of a critical speed, which would lead to an excessive load on the gas turbine, is advantageously prevented. The critical speed of the gas turbine can be avoided even if, when testing the overspeed protection device, the same gas turbine limit speed is used as during 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 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 together on the
- the single-shaft system 1 has an overspeed protection device.
- the overspeed protection device is set up such that a first overspeed protection is triggered as soon as the speed of the steam turbine 3 reaches a steam turbine limit speed, and a second overspeed protection is triggered as soon as the speed of the gas turbine 2 reaches a gas turbine limit value speed.
- the gas turbine limit speed may be less than, equal to, or greater than the steam turbine limit speed.
- the mass flow of the steam can be interrupted.
- the mass flow of the fuel can be interrupted.
- the clutch 7 is disengaged so that the gas turbine 2 and the steam turbine 3 can rotate independently of each other.
- the disengagement of the clutch 7 can be done by a mechanical conversion or removal of the clutch 7.
- the disengagement of the clutch 7 can take place by means of an electric motor or hydraulically.
- the method for testing an overspeed protection device of a gas turbine 2, a generator 4 to which no electric load is connected, and a steam turbine 3 having single-shaft system 1 having a clutch 7, by means of the steam turbine 3 to the single-shaft system 1 can be coupled, with the steps carried out: a) disengagement of the clutch 7 by an expansion of the clutch 7; b) operating the gas turbine 2 and the steam turbine 3 at their rated speed; c) increasing the mass flow of the steam introduced into the steam turbine 3 such that the speed of the steam turbine 3 reaches a steam turbine limit speed, the overspeed protection device being arranged to trigger a first overspeed protection as soon as the speed of the steam turbine 3 reaches the steam turbine limit speed; d) Check if the first overspeed protection is triggered; dl) interrupting the mass flow of steam introduced into the steam turbine 3 in the event that the first overspeed protection is triggered; e) increasing the speed of the gas turbine 2 such that the speed of the gas turbine 2 reaches a Gasurbinengrenzwert
- the method for testing an overspeed protection device of a gas turbine 2, a generator 4 to which an electrical load is connected, and a single-shaft system 1 having a steam turbine 3, which has a clutch 7, by means of the steam turbine 3 to the single-shaft system 1 can be coupled, carried out with the steps: a) disengaging the clutch 7; b) operating the gas turbine 2 at its rated speed and with the generator 4 connected electrical load and the steam turbine 3 at their rated speed; c) increasing the mass flow of steam introduced into the steam turbine 3 such that the speed of the steam turbine 3 reaches a steam turbine limit speed, wherein the overspeed protection device is arranged such that a first overspeed protection is triggered when the speed of the steam turbine 3, the steam turbine limit speed reached; d) Check if the first overspeed protection is triggered; dl) interrupting the mass flow of steam introduced into the steam turbine 3 in the event that the first overspeed protection is triggered; e) increasing the speed of the gas turbine 2 by dropping the electrical load by opening the switch
- the steam turbine limit speed may be 104% to 107% of the rated speed and the gas turbine limit speed may be equal to the steam turbine speed limit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14766939T PL3022401T3 (pl) | 2013-09-17 | 2014-09-08 | Sposób testowania systemu ochrony przed nadobrotami w urządzeniu jednowałowym |
EP14766939.4A EP3022401B1 (de) | 2013-09-17 | 2014-09-08 | Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlage |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13184828.5A EP2848775A1 (de) | 2013-09-17 | 2013-09-17 | Verfahren zum Testen einer Überdrehzahlschutzeinrichtung einer Einwellenanlage |
PCT/EP2014/069067 WO2015039907A2 (de) | 2013-09-17 | 2014-09-08 | Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlage |
EP14766939.4A EP3022401B1 (de) | 2013-09-17 | 2014-09-08 | Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3022401A2 true EP3022401A2 (de) | 2016-05-25 |
EP3022401B1 EP3022401B1 (de) | 2017-08-30 |
Family
ID=49182156
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13184828.5A Withdrawn EP2848775A1 (de) | 2013-09-17 | 2013-09-17 | Verfahren zum Testen einer Überdrehzahlschutzeinrichtung einer Einwellenanlage |
EP14766939.4A Not-in-force EP3022401B1 (de) | 2013-09-17 | 2014-09-08 | Verfahren zum testen einer überdrehzahlschutzeinrichtung einer einwellenanlage |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13184828.5A Withdrawn EP2848775A1 (de) | 2013-09-17 | 2013-09-17 | Verfahren zum Testen einer Überdrehzahlschutzeinrichtung einer Einwellenanlage |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP2848775A1 (de) |
KR (1) | KR101849864B1 (de) |
PL (1) | PL3022401T3 (de) |
WO (1) | WO2015039907A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6944406B2 (ja) * | 2018-03-29 | 2021-10-06 | 三菱パワー株式会社 | 一軸コンバインドサイクルプラント、一軸コンバインドサイクルプラントの試験方法および一軸コンバインドサイクルプラントの制御装置 |
Family Cites Families (5)
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 |
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 |
EP2458180A1 (de) * | 2010-11-30 | 2012-05-30 | Siemens Aktiengesellschaft | Verfahren zum Betreiben einer Gasturbine bei Lastabwurf, Vorrichtung zum Regeln des Betriebs einer Gasturbine sowie Kraftwerk |
-
2013
- 2013-09-17 EP EP13184828.5A patent/EP2848775A1/de not_active Withdrawn
-
2014
- 2014-09-08 KR KR1020167009642A patent/KR101849864B1/ko active IP Right Grant
- 2014-09-08 WO PCT/EP2014/069067 patent/WO2015039907A2/de active Application Filing
- 2014-09-08 PL PL14766939T patent/PL3022401T3/pl unknown
- 2014-09-08 EP EP14766939.4A patent/EP3022401B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2015039907A2 * |
Also Published As
Publication number | Publication date |
---|---|
PL3022401T3 (pl) | 2018-02-28 |
EP3022401B1 (de) | 2017-08-30 |
KR101849864B1 (ko) | 2018-04-17 |
WO2015039907A3 (de) | 2015-05-14 |
KR20160055879A (ko) | 2016-05-18 |
EP2848775A1 (de) | 2015-03-18 |
WO2015039907A2 (de) | 2015-03-26 |
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