EP2131013A1 - Système de turbines à vapeur pour une centrale - Google Patents

Système de turbines à vapeur pour une centrale Download PDF

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Publication number
EP2131013A1
EP2131013A1 EP08007316A EP08007316A EP2131013A1 EP 2131013 A1 EP2131013 A1 EP 2131013A1 EP 08007316 A EP08007316 A EP 08007316A EP 08007316 A EP08007316 A EP 08007316A EP 2131013 A1 EP2131013 A1 EP 2131013A1
Authority
EP
European Patent Office
Prior art keywords
steam
live
valve
quick
turbine system
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Withdrawn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
EP08007316A
Other languages
German (de)
English (en)
Inventor
Carsten Graeber
Norbert Schindler
Carsten Dr. Weiss
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 EP08007316A priority Critical patent/EP2131013A1/fr
Priority to CN2009801132490A priority patent/CN102007274A/zh
Priority to EP09733333A priority patent/EP2288793A2/fr
Priority to KR1020107022819A priority patent/KR20100133427A/ko
Priority to RU2010146183/06A priority patent/RU2010146183A/ru
Priority to US12/937,294 priority patent/US20110146279A1/en
Priority to PCT/EP2009/053924 priority patent/WO2009127523A2/fr
Publication of EP2131013A1 publication Critical patent/EP2131013A1/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Withdrawn legal-status Critical Current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
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F01K7/165—Controlling means specially adapted therefor
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • 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
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F01K3/181—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters using nuclear heat

Definitions

  • the invention relates to a steam turbine system for a power plant and the power plant with the steam turbine system.
  • a nuclear power plant is operated, for example, with a pressurized water reactor.
  • fuel elements are provided in which, caused by atomic decomposition reactions, heat is released.
  • the heat is dissipated by a coolant, e.g. Water, discharged, with the steam produced in a steam generator live steam.
  • the live steam is conducted in a live steam line to a steam turbine, which is coupled to a generator to drive it.
  • a condenser is provided at the outlet of the steam turbine in which the expanded steam is condensed using a refrigerant and returned to the steam generator.
  • the steam turbine has a bleed steam outlet, is removed by the bleed steam for further use in the nuclear power plant.
  • the drive power of the steam turbine is determined by the temperature and the static pressure of the live steam, the static pressure in the condenser and the mass flow of the live steam entering the steam turbine and the mass flow of the bleed steam taken at a certain pressure level of the steam turbine.
  • a steam steam control valve is provided on the steam turbine.
  • a nominal operating state is defined in which the temperature and the static pressure of the live steam and the mass flow of the live steam is fixed.
  • nominal operating condition warranty point a steam turbine system
  • the live steam mass flow is defined as 100%.
  • an operating range is to be considered, which is determined by a variation of the temperature and the static pressure of the live steam and the live steam mass flow.
  • the steam turbine is designed for a stationary partial load operation with a constant mean coolant temperature in the upper load range.
  • Another operating condition to be considered in the design of the steam turbine is characterized by a reduced static pressure of the live steam.
  • the steam steam control valve is fully opened with a nominal or smaller steam quantity of the steam generator / reactor, so that the static pressure of the live steam is lowered and thus a lowering of the coolant temperature occurs (so-called “stretch-out operation").
  • the reduction of the static pressure of the live steam leads to an increase of the specific live steam volume, whereby a strong throttling of the fresh steam control valve in the nominal operating state is necessary.
  • a performance guarantee for the steam turbine is conventionally related to the nominal operating state, which is mobile only with the throttled steam control valve.
  • the operation of the steam turbine with throttled live steam valve is ineffective, whereby the thermal efficiency of the nuclear power plant is lowered.
  • the object of the invention is to provide a steam turbine system for a power plant and the power plant with the steam turbine system, wherein the power plant has a high thermal efficiency.
  • the steam turbine system according to the invention for the power plant has a steam turbine, which has at its live steam inlet a steam control valve and a tap steam outlet, and a live steam bypass line with a throttle valve at the entrance of the steam control valve and at the bleed steam outlet for conducting with the throttle valve throttled live steam from the upstream of Fresh steam control valve is connected to the Anzapfdampfaustritt, wherein the steam turbine with the steam control line and the steam bypass line are designed with the throttle valve such that the steam turbine is both in the nominal operating state at 100% live steam mass flow and in a special operating state at 100% fresh steam mass flow in each case with fully opened steam control valve wherein excess live steam mass flow relative to the nominal operating state at the entrance of the fresh steam control valve via the Frischdampfumgehungsle It is possible to pass the steam turbine past it or, at 100% live steam mass flow, to lower the static pressure of the live steam by passing a predetermined, proportion of the live steam mass flow via the live steam bypass line.
  • the proportion of the live steam which is supplied from a steam generator over the 100% live steam mass flow, not fed directly to the steam turbine, but passed via the live steam bypass line to the steam control valve and fed into the bleed steam outlet with the highest static pressure.
  • the steam control valve is fully open, whereby a loss of efficiency by a possible Throttling the live steam valve does not occur.
  • the 100% fresh steam mass flow corresponds to the live steam mass flow in the nominal operating state of the steam turbine.
  • the steam turbine needs less or no bleed steam to be taken because the live steam bypassing the steam bypass steam line is fed to the bleed steam outlet.
  • the thermal efficiency of the steam turbine system is high in a wide operating range of the steam turbine.
  • the power plant is able to participate in a frequency control / support of a power grid. If the power plant is, for example, a nuclear power plant, then with the steam turbine system possible power reserves of the nuclear reactor can be used without conversion of the steam turbine with appropriate operation, the steam turbine system having a high thermal efficiency in the nominal operating state.
  • the nuclear power plant has a higher operating flexibility, whereby a fuel change in the nuclear power plant can be delayed, so that a higher burnup of the fuel rods can be achieved.
  • the nuclear power plant in the so-called “stretch-out" operation to drive, in which the increased reactivity can be achieved by lowering the pressure of the live steam.
  • the steam turbine system according to the invention has a high thermal efficiency when the steam turbine is a saturated steam engine with a low live steam condition and thus a reduced expansion gradient.
  • the steam turbine is run at 100% live steam mass flow with fully opened steam control valve in the nominal operating state, so that in a wide operating range of the steam turbine system throttling the steam control valve in the nominal operating state not needs to be provided.
  • This is advantageous because even with a one percent throttling of the main steam control valve in the nominal operating state would be expected with a reduction in power of the steam turbine at the same reactor power of 0.13%.
  • the avoidance of the throttling of the fresh steam control valve in the nominal operating state due to the higher efficiency of the steam turbine system leads to a power gain of the power plant.
  • thermodynamic guaranteed values of the steam turbine system according to the invention are improved in the performance guarantee, because a corresponding throttling of the steam control valves can be omitted.
  • the live steam mass flow is preferably 102% to 115% of the live steam mass flow in the nominal operating state.
  • the power plant may utilize potential power reserves of the reactor / steam generator permanently in steady-state operation or alternatively for short-term power release in frequency control / frequency support requirements.
  • the steam turbine system preferably has a main steam line with a quick-action valve which is connected to the main steam control valve for supplying the live steam mass flow, the main steam bypass line being connected between the main steam control valve and the quick-closing valve of the main steam line.
  • the live steam bypass line is branched off downstream of the quick-closing valve of the main steam line of this, which is protected by the quick-closing valve of the main steam line and the live steam bypass line.
  • the quick-acting valve in the live steam bypass line is a control valve with safety function educated. As a result, it is advantageous to provide only a single valve in the main steam bypass line.
  • the fish steam bypass line is connected upstream of the quick-acting valve.
  • the fresh steam control valve is a quick-closing control valve with safety function for double protection.
  • the pipe incorporation is simple and for a valve test operation no corresponding modifications need to be provided, so that this conditional restrictions are prevented.
  • a quick-closing valve is provided at the live steam inlet and the live steam bypass line has a quick-acting valve which is installed upstream of the throttle valve.
  • the steam turbine is protected at its live steam inlet and the bypass line.
  • the quick-closing valve of the live steam by-pass line is coupled to the quick-steam valve at the live steam inlet, so that the quick-closing valve of the fresh steam bypass line triggers on the live steam inlet with the quick-closing valve.
  • the throttle valve is coupled to the bleed steam inlet, so that the throttle valve throttles the live steam to the bleed steam pressure in the bleed steam outlet.
  • the bypass mass flow via the live steam bypass line is regulated by the throttle valve, so that the live steam pressure required by the reactor / steam generator can be set in the main steam line when the main steam control valves are fully open.
  • the steam turbine system has a bleed steam line which is connected to the bleed steam outlet and into which the live steam bypass line opens.
  • the power plant according to the invention with the steam turbine system has to reheat the live steam on a reheater to which the bleed steam can be supplied.
  • the steam turbine system has the live steam bypass line through which steam is supplied to the bleed steam with the throttle valve.
  • the live steam supplied to the steam turbine via the live steam bypass line is supplied to the reheater for superheating the live steam, whereby the power plant has a high thermal efficiency.
  • the reheater is made in two stages.
  • bypass mass flow can be significantly increased before it comes to a direct introduction of the throttled bypass mass flow into the steam turbine.
  • a check valve is provided at the bleed steam outlet, upstream of which the live steam bypass line opens.
  • a steam turbine system 100 has a steam turbine 110 and a steam turbine 111.
  • the steam turbines 110 and 111 have a live steam inlet 112 to 115 for the live steam inlet and a bleed steam outlet 116 for the removal of bleed steam.
  • fresh steam control valves 117 to 120 are provided at the steam recesses 112 to 115.
  • To protect the live steam inlets 112 to 115 and the steam turbine are connected to these quick-closing valves 121 to 124.
  • the steam turbine system 100 has live steam lines 125 to 128, which are respectively connected to the live steam inlets 112 to 115.
  • a bleed steam line 129 is provided at the bleed steam outlet 116.
  • the steam turbine system 100 has a live steam bypass line 130, which is connected to the inlet of the main steam control valves 117 to 120 and the bleed steam outlet 116, so that live steam can be conducted past the inlet of the fresh steam control valves 117 to 129 to the bleed steam outlet 116 at the steam turbines 110 and 111 in the live steam bypass line 130 is.
  • the fish steam by-pass line 130 connected upstream of the quick-closing valve.
  • a quick-closing valve 131 and subsequently a throttle valve 132 are provided, as seen in the flow direction.
  • the quick-closing valve 131 is coupled to the quick-closing valve 121 so that both quick-acting valves 121 to 124 and 131 trigger synchronously when a triggering event (for example, overspeed) is correspondingly reached.
  • the throttle valve 132 is regulated depending on the vapor pressure downstream of the main steam bypass passage 130, so that the main steam is throttled from the entrance of the main steam control valves 117 to 120 to the tap vapor exit 116.
  • live steam lines 125 to 128 are provided, in which live steam for operating the steam turbine 110 and 111 is provided.
  • live steam for operating the steam turbine 110 and 111 is provided in the main steam lines 125 to 128.
  • quick-acting valves 146 to 149 are provided for securing the live steam inlet and the steam turbine.
  • check valves 170 and 171 are provided in the bleed line 129, with which a return flow in the bleed steam line 129 can be prevented.
  • the live steam bypass line 130 branches off in the main steam lines 125 to 128 between the quick-closing valves 146 to 149 and the inlet of the fresh steam control valves 117 to 120 and opens into the tapping steam line 129 between the non-return valve 171 and the tapping steam outlet 116.
  • control valves 150 and 151 are provided parallel to the quick-closing valves 146 to 149.
  • the steam turbine system 100 includes reheaters 140 and 141, each having a first reheater stage 142 and 143 and a second reheater stage 144 and 145 have.
  • second heating pipes 162 and 163 branch off downstream of the non-return flap 170, in which tapping steam is conducted to the first reheater stages 142 and 143.
  • first heating steam lines 160 and 161 are provided at the second reheater stages 144 and 145 for supplying live steam, which is fed into the main steam line 125 to 128 upstream of the quick-closing valves 146 to 149.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Control Of Turbines (AREA)
EP08007316A 2008-04-14 2008-04-14 Système de turbines à vapeur pour une centrale Withdrawn EP2131013A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP08007316A EP2131013A1 (fr) 2008-04-14 2008-04-14 Système de turbines à vapeur pour une centrale
CN2009801132490A CN102007274A (zh) 2008-04-14 2009-04-02 发电厂的汽轮机系统
EP09733333A EP2288793A2 (fr) 2008-04-14 2009-04-02 Système de turbine à vapeur pour centrale électrique
KR1020107022819A KR20100133427A (ko) 2008-04-14 2009-04-02 발전 설비용 증기 터빈 시스템
RU2010146183/06A RU2010146183A (ru) 2008-04-14 2009-04-02 Паротурбинная установка для электростанций
US12/937,294 US20110146279A1 (en) 2008-04-14 2009-04-02 Steam turbine system for a power plant
PCT/EP2009/053924 WO2009127523A2 (fr) 2008-04-14 2009-04-02 Système de turbine à vapeur pour centrale électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08007316A EP2131013A1 (fr) 2008-04-14 2008-04-14 Système de turbines à vapeur pour une centrale

Publications (1)

Publication Number Publication Date
EP2131013A1 true EP2131013A1 (fr) 2009-12-09

Family

ID=41165404

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08007316A Withdrawn EP2131013A1 (fr) 2008-04-14 2008-04-14 Système de turbines à vapeur pour une centrale
EP09733333A Withdrawn EP2288793A2 (fr) 2008-04-14 2009-04-02 Système de turbine à vapeur pour centrale électrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09733333A Withdrawn EP2288793A2 (fr) 2008-04-14 2009-04-02 Système de turbine à vapeur pour centrale électrique

Country Status (6)

Country Link
US (1) US20110146279A1 (fr)
EP (2) EP2131013A1 (fr)
KR (1) KR20100133427A (fr)
CN (1) CN102007274A (fr)
RU (1) RU2010146183A (fr)
WO (1) WO2009127523A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120071751A (ko) 2010-12-23 2012-07-03 엘지디스플레이 주식회사 디스플레이 장치
US8926273B2 (en) 2012-01-31 2015-01-06 General Electric Company Steam turbine with single shell casing, drum rotor, and individual nozzle rings
KR101989516B1 (ko) * 2012-09-24 2019-06-14 삼성전자주식회사 반도체 패키지
JP6185338B2 (ja) * 2013-08-29 2017-08-23 ヤンマー株式会社 発電装置
EP3040525B1 (fr) 2015-01-05 2020-08-26 General Electric Technology GmbH Turbine à vapeur à plusieurs étages pour la production d'énergie

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EP1854964A1 (fr) * 2006-05-10 2007-11-14 Siemens Aktiengesellschaft Utilisation de la turbine à vapeur pour la régulation primaire de la fréquence dans des installations de production d'énergie
EP1881164A1 (fr) * 2006-07-21 2008-01-23 Ansaldo Energia S.P.A. Dispositif pour la regulation des vannes d'ârret d'une installation à turbines à vapeur

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US4455836A (en) * 1981-09-25 1984-06-26 Westinghouse Electric Corp. Turbine high pressure bypass temperature control system and method
EP0079598A2 (fr) * 1981-11-13 1983-05-25 Westinghouse Electric Corporation Système de by-pass pour turbine à vapeur
JPS60175711A (ja) * 1984-02-23 1985-09-09 Mitsubishi Heavy Ind Ltd 発電機負荷制限動作装置
EP1854964A1 (fr) * 2006-05-10 2007-11-14 Siemens Aktiengesellschaft Utilisation de la turbine à vapeur pour la régulation primaire de la fréquence dans des installations de production d'énergie
EP1881164A1 (fr) * 2006-07-21 2008-01-23 Ansaldo Energia S.P.A. Dispositif pour la regulation des vannes d'ârret d'une installation à turbines à vapeur

Also Published As

Publication number Publication date
WO2009127523A3 (fr) 2009-12-23
EP2288793A2 (fr) 2011-03-02
KR20100133427A (ko) 2010-12-21
CN102007274A (zh) 2011-04-06
WO2009127523A2 (fr) 2009-10-22
US20110146279A1 (en) 2011-06-23
RU2010146183A (ru) 2012-05-20

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