EP2100010A2 - Aube de turbine - Google Patents

Aube de turbine

Info

Publication number
EP2100010A2
EP2100010A2 EP07857858A EP07857858A EP2100010A2 EP 2100010 A2 EP2100010 A2 EP 2100010A2 EP 07857858 A EP07857858 A EP 07857858A EP 07857858 A EP07857858 A EP 07857858A EP 2100010 A2 EP2100010 A2 EP 2100010A2
Authority
EP
European Patent Office
Prior art keywords
steam
power plant
steam power
pressure
generator
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
EP07857858A
Other languages
German (de)
English (en)
Other versions
EP2100010B1 (fr
Inventor
Stefan Glos
Matthias Heue
Ernst-Wilhelm Pfitzinger
Norbert Pieper
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 EP07857858.0A priority Critical patent/EP2100010B1/fr
Publication of EP2100010A2 publication Critical patent/EP2100010A2/fr
Application granted granted Critical
Publication of EP2100010B1 publication Critical patent/EP2100010B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting

Definitions

  • the invention relates to a method for increasing the steam mass flow of a high-pressure steam turbine of a steam power plant, in particular a steam power plant with intermediate overheating, during a start-up phase of the steam power plant, especially during idling of the steam power plant.
  • the boiler of the power plant When starting or starting a fossil-fired power plant, the boiler of the power plant is first driven to minimum load (usually 30 to 40%).
  • the live steam generated during this run-up phase is usually first bypassed the steam turbine during (so-called) bypass operation.
  • the live steam In systems with reheating, the live steam is passed through a high-pressure bypass station, sprayed to a lower temperature level and then directed into the cold line of reheat.
  • the steam, which leaves the hot stream of reheat is fed through a medium-pressure bypass station and, after cooling, fed into the condenser by means of injection water.
  • a high pressure level in the reheat (usually about 20-30 bar) is an effective cooling of the acted upon with flue gas reheater pipes is guaranteed.
  • the invention has for its object to provide a method by which can be reduced without great effort and cost as possible before adjusting the network synchronization during a start-up phase of a steam power plant high temperatures.
  • This object is achieved according to the invention with the above-mentioned method for increasing the steam mass flow of a high-pressure steam turbine of a steam power plant, which in particular has a reheat, during a start-up phase, and in particular during idling of the steam power plant in which a generator of the steam power plant Synchronization with a power supply network at least one electrical load is switched on.
  • the no-load power is artificially increased on the electrical side, accompanied by a corresponding increase in the steam mass flow already before synchronization with a power supply network.
  • the high-pressure turbine of a steam power plant with an increased steam mass flow can generate more power in such a way that the generator is already energized early and electrical consumers are switched on before the grid synchronization.
  • This electrically generated power is dissipated to electrical consumers, preferably in the form of resistors. given, which must be cooled accordingly.
  • the associated with the process according to the invention increased steam mass flow before mains synchronization causes in particular the high-pressure turbine less ventilated at idle and therefore the Abdampf Scheme and the line of the cold
  • Strangs the reheat even at very high steam temperatures can be designed with less expensive materials, especially because the temperature differences between idling and rated load operation are no longer so pronounced.
  • the electrical load preferably in the form of an electrical resistance, is arranged in a feedwater tank of the steam power plant in order to supply the electrical power
  • the electrical load is arranged in a condensate collecting tank of a condenser of the steam power plant.
  • a cooling of the electrical load can also be achieved by arranging the electrical load in the cooling water of the steam power plant, wherein both main cooling water and secondary cooling water can be used for cooling.
  • the invention further relates to a steam power plant, with which the inventive method is feasible, with a generator, a high-pressure steam turbine and at least one electrical load, which can be connected during a start-up phase of the steam power plant to the generator to before synchronization of the generator with To increase a power supply network, a steam mass flow of the high-pressure steam turbine.
  • the electrical load is preferably arranged in a feedwater tank of the steam power plant, in a Kondensationsammel constituteer a condenser of the steam power plant or in the cooling water of the steam power plant.
  • FIG. 1 shows the structure of a steam power plant according to the invention.
  • the steam power plant 10 includes, inter alia, a boiler 12, a high pressure turbine 14, a medium pressure turbine 16, a low pressure turbine 18, a generator 20, a condenser 22 with sump 24 , a feedwater tank 26 with degasser, live steam lines 28 and a support line 30.
  • the boiler 12 When starting or starting up the steam power plant 10, the boiler 12 is initially driven to minimum load (usually 30-40%), wherein the generated steam is usually initially passed by the high-pressure turbine 14 (bypass operation).
  • the bypass operation is realized here by closing the quick-action valve 32 or control valve 34 arranged in the steam inflow region of the high-pressure turbine 14, wherein the live steam is conducted via a high-pressure bypass station 36, sprayed to a lower temperature level and then supplied to a reheat 38 , first the cold strand 40 of the reheat.
  • the steam leaving the hot leg 42 of the ZU is fed via a medium pressure Diverter station 44 and passed after cooling by injection water into the condenser 22. Due to a high pressure level in the intermediate superheating 38 (usually approx. 20-30 bar), effective cooling of the reheater pipes treated with flue gas is ensured.
  • the high pressure in the cold section 40 of the reheating at the outlet of the high-pressure turbine 14 leads to temperatures which are particularly high in the hot-air turbine. or warm start are significantly higher than in rated load operation.
  • the reason for this is low temperature degradation or ventilation in the high pressure turbine 14 at low steam mass flows.
  • An increase in this idling mass flow is not possible due to the speed control, since the turbine-generator train can still deliver power to the grid. Only after synchronization with the network can the power and thus the mass flow be increased, but the temperature differences between the steam and the components of the turbines must not become too large.
  • the exhaust area of the high pressure turbine 14 and the cold reheat line 40 this means that they are exposed to greatly elevated and rapidly changing temperatures, which may involve the use of expensive materials to design the exhaust steam section of the high pressure turbine 14 and cold leg 40 require reheat.
  • At least one electrical load in the form of an electrical resistor 46 is switchably coupled to the generator 20 (see dotted lines in FIG.
  • the resistor 46 and the resistors 46 may be arranged according to the invention for their cooling in the feedwater tank 26, in the condensate collection tank 24 or in the cooling water. If, according to the invention, the generator 20 is prematurely energized before synchronization of the generator 20 with a power supply network, one or more can several of the electrical resistors 46 are switched on. Thus, the idling power on the electrical side is artificially increased even before synchronization, along with a corresponding increase in the steam mass flow.
  • the tubes of the reheat 38 are already cooled more, since less steam has to be drawn from the cold strand 40 of the reheat over the support line 30 onto the feed water tank 26 in order to ensure degassing.
  • the idle now higher mass flow through the high-pressure turbine 14 leads to a greater degradation of the enthalpy and thus lower high-pressure Abdampftemperaturen.
  • increasing the idle power from 5 to 15 MW would bring about a reduction of the high-pressure steaming temperature from 580 ° C. to 510 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

L'invention concerne un procédé (10) pour augmenter le débit massique de vapeur d'une turbine à vapeur haute pression (14) d'une centrale à vapeur (10), en particulier d'une centrale à vapeur (10) à surchauffe intermédiaire (38), pendant une phase de démarrage de la centrale à vapeur (10), en particulier également pendant un fonctionnement au ralenti de la centrale à vapeur (10), selon lequel au moins un consommateur électrique (46) est connecté à un générateur (20) de la centrale à vapeur (10) avant une synchronisation avec un réseau d'alimentation électrique. L'invention concerne en outre une centrale à vapeur (10), comprenant un générateur (20), une turbine à vapeur haute pression (14) et au moins un consommateur électrique (46), qui peut être connecté au générateur (20) pendant une phase de démarrage de la centrale à vapeur (10), en particulier également pendant un fonctionnement au ralenti de la centrale à vapeur, pour augmenter un débit massique de la turbine à vapeur haute pression (14) avant une synchronisation du générateur (20) avec un réseau d'alimentation électrique.
EP07857858.0A 2007-01-04 2007-12-19 Procédé pour accroître le débit de vapeur dans une turbine à vapeur haute pression d'une centrale lors de la mise en route de la centrale Not-in-force EP2100010B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07857858.0A EP2100010B1 (fr) 2007-01-04 2007-12-19 Procédé pour accroître le débit de vapeur dans une turbine à vapeur haute pression d'une centrale lors de la mise en route de la centrale

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07000140A EP1953350A3 (fr) 2007-01-04 2007-01-04 Aube de turbine
EP07857858.0A EP2100010B1 (fr) 2007-01-04 2007-12-19 Procédé pour accroître le débit de vapeur dans une turbine à vapeur haute pression d'une centrale lors de la mise en route de la centrale
PCT/EP2007/064237 WO2008080854A2 (fr) 2007-01-04 2007-12-19 Aube de turbine

Publications (2)

Publication Number Publication Date
EP2100010A2 true EP2100010A2 (fr) 2009-09-16
EP2100010B1 EP2100010B1 (fr) 2015-07-15

Family

ID=39580471

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07000140A Withdrawn EP1953350A3 (fr) 2007-01-04 2007-01-04 Aube de turbine
EP07857858.0A Not-in-force EP2100010B1 (fr) 2007-01-04 2007-12-19 Procédé pour accroître le débit de vapeur dans une turbine à vapeur haute pression d'une centrale lors de la mise en route de la centrale

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07000140A Withdrawn EP1953350A3 (fr) 2007-01-04 2007-01-04 Aube de turbine

Country Status (5)

Country Link
US (1) US8387388B2 (fr)
EP (2) EP1953350A3 (fr)
JP (1) JP5027887B2 (fr)
CN (1) CN101573511B (fr)
WO (1) WO2008080854A2 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4240155B1 (ja) * 2008-03-06 2009-03-18 三浦工業株式会社 蒸気システム
CA2788178C (fr) * 2010-01-27 2018-02-27 United Technologies Corporation Systeme de production d'energie a suivi de charge a cycle de rankine a caloporteur organique (orc), et procede d'exploitation
NO331329B1 (no) * 2010-02-18 2011-11-28 Energreen As Fluidkjolt lastmotstand for bruk ved energiproduksjon og anvendelse av denne
KR20140123048A (ko) * 2012-01-19 2014-10-21 지멘스 악티엔게젤샤프트 발전소용 보조 증기 발생기
EP2738458B2 (fr) * 2012-11-30 2023-05-24 Lumenion AG Centrale électrique et procédé de génération de courant électrique
DE102013205053B4 (de) * 2013-03-21 2015-05-07 Kraftwerke Mainz-Wiesbaden AG Verfahren zum Betrieb eines einen Wasser-Dampf-Kreislauf aufweisenden Kraftwerks
US20160251984A1 (en) * 2013-11-26 2016-09-01 John Gibble Supplemental heating in waste heat recovery
EP2918796A1 (fr) * 2014-03-13 2015-09-16 Siemens Aktiengesellschaft Centrale à vapeur dotée d'un générateur de vapeur comprenant une armature de maintien de pression à tambour
CN105041388B (zh) * 2015-07-04 2017-04-05 国网山东省电力公司滨州供电公司 一种发电设备以及发电设备的电网同步方法
CN105781641B (zh) * 2015-07-04 2018-03-20 佛山恒益发电有限公司 火力发电厂发电设备以及电网同步控制方法
DE102019216616A1 (de) * 2019-10-29 2021-04-29 Siemens Aktiengesellschaft Anlage mit elektrischem Speicher zum schnelleren Anfahren einer Dampfturbine und Verfahren

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US2811837A (en) * 1956-08-24 1957-11-05 Gen Electric Governing system for reheat turbine
US3216199A (en) * 1962-05-15 1965-11-09 United Aircraft Corp Power conversion system
US3875384A (en) * 1973-11-06 1975-04-01 Westinghouse Electric Corp Protection system for transferring turbine and steam generator operation to a backup mode especially adapted for multiple computer electric power plant control systems
US3943718A (en) * 1974-01-07 1976-03-16 Berry Clyde F Steam generation system
US4368520A (en) * 1980-09-29 1983-01-11 Westinghouse Electric Corp. Steam turbine generator control system
US4474012A (en) * 1983-07-13 1984-10-02 General Electric Company Steam turbine pressure rate limiter
CZ382892A3 (en) * 1992-02-20 1993-09-15 Asea Brown Boveri Device with a gas turbine and method for starting thereof
DE4432960C1 (de) * 1994-09-16 1995-11-30 Steinmueller Gmbh L & C Verfahren zum Betrieb eines Dampfkraftwerkes und Dampfkraftwerk
DE10227709B4 (de) * 2001-06-25 2011-07-21 Alstom Technology Ltd. Dampfturbinenanlage sowie Verfahren zu deren Betrieb
US6951105B1 (en) * 2004-04-20 2005-10-04 Smith Edward J Electro-water reactor steam powered electric generator system
JP2008534851A (ja) * 2005-03-30 2008-08-28 アルストム テクノロジー リミテッド 接続可能な補助グループから成るタービン装置を始動する方法

Non-Patent Citations (1)

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Title
See references of WO2008080854A2 *

Also Published As

Publication number Publication date
WO2008080854A2 (fr) 2008-07-10
US8387388B2 (en) 2013-03-05
JP2010514985A (ja) 2010-05-06
EP1953350A2 (fr) 2008-08-06
US20100313564A1 (en) 2010-12-16
EP1953350A3 (fr) 2009-01-07
CN101573511A (zh) 2009-11-04
EP2100010B1 (fr) 2015-07-15
JP5027887B2 (ja) 2012-09-19
WO2008080854A3 (fr) 2009-01-29
CN101573511B (zh) 2012-08-22

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