GB1411814A - System and method for operating a steam turbine with independent overspeed protection - Google Patents
System and method for operating a steam turbine with independent overspeed protectionInfo
- Publication number
- GB1411814A GB1411814A GB4612572A GB4612572A GB1411814A GB 1411814 A GB1411814 A GB 1411814A GB 4612572 A GB4612572 A GB 4612572A GB 4612572 A GB4612572 A GB 4612572A GB 1411814 A GB1411814 A GB 1411814A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- steam
- overspeed
- turbine
- speed
- 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.)
- Expired
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
- 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
- F01K7/24—Control or safety 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Turbines (AREA)
Abstract
1411814 Steam turbines WESTINGHOUSE ELECTRIC CORP 6 Oct 1972 [14 Oct 1971] 46125/72 Heading F1T A steam turbine plant has an overspeed protection arrangement comprising three separate speed sensing systems and logic circuitry such that if any two of the sensing systems indicate a potential or actual overspeed condition then turbine steam flow control valves are closed. In Fig 1B a nuclear heated steam generator 102, 103 supplies steam through stop and governor valves 106, 108 to an H.P. turbine 110 and thence through a reheater (116) Fig. 1A (not shown), stop and interceptor valves (120, 118) to L.P. turbines (112, 114). The turbines drive an electric generator (122). In addition to the speed and other sensors controlling the steam valves during normal operation the plant includes three independent speed sensors 124-1, -2, -3 each with an associated check circuit 138, 140, 142. Each of the latter includes Fig. 2 (not shown), a comparator (210) to compare the sensed speed with an overspeed reference, e.g. 111% of synchronous speed, and a delay arrangement (220, 222) to sense any abrupt change in turbine speed, together with testpoints to check operation of the circuitry. Check circuits 138, 140, 142 are connected via relays 146, 148, 150, 152 &c. to a logic circuit 144 which includes duplicate AND-gates (172, 176) Fig. 4 (not shown), which operate to close the steam flow valves if a minimum of two check circuits emit signals indicating actual or potential overspeed or failure of the sensing system power supply. Thus it is possible to check operation of any one of circuits 138, 140, 142 during plant running without reducing overspeed protection. The steam flow valves 106, 108, (118, 120) are positioned by hydraulic actuators 130, 132, (136, 134) respectively and when the AND-gates (172, 176) emit overspeed signals solenoids 50, 51 operate to open valves 506, 508, Fig. 5, to cause rapid dumping of operating oil from each actuator cylinder 500 into a receiver 510, the steam valve thus closing under the action of spring 518. Receiver 510 is of heavy steel and has an associated shield (524, 526) Fig. 6 (not shown), to protect valves 506, 508 from turbine fragments. The receiver may include a blowout disc (528). Normal running of the plant may be controlled by a digital or analogue computer which may also be used to perform the function of check circuits 138, 140, 142 and of logic circuit 144.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00189322A US3829232A (en) | 1971-10-14 | 1971-10-14 | System and method for operating a steam turbine with dual hydraulic independent overspeed protection especially adapted for a nuclear reactor powered steam turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1411814A true GB1411814A (en) | 1975-10-29 |
Family
ID=22696820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4612572A Expired GB1411814A (en) | 1971-10-14 | 1972-10-06 | System and method for operating a steam turbine with independent overspeed protection |
Country Status (11)
Country | Link |
---|---|
US (1) | US3829232A (en) |
AT (1) | AT319977B (en) |
BE (1) | BE790020A (en) |
CA (1) | CA993508A (en) |
CH (1) | CH547442A (en) |
DE (1) | DE2248042A1 (en) |
FR (1) | FR2157478A5 (en) |
GB (1) | GB1411814A (en) |
IT (1) | IT968942B (en) |
NL (1) | NL7213866A (en) |
ZA (1) | ZA727070B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2461610A (en) * | 2008-07-10 | 2010-01-13 | Gen Electric | Method and system to facilitate over-speed protection |
US8321119B2 (en) | 2008-07-10 | 2012-11-27 | General Electric Company | Methods and systems to facilitate over-speed protection |
CN103850724A (en) * | 2012-11-29 | 2014-06-11 | 中广核工程有限公司 | System and method for achieving emergent shutdown of steam turbine in nuclear power station |
CN115126552A (en) * | 2022-07-26 | 2022-09-30 | 中国船舶重工集团公司第七0四研究所 | Through-flow valve block structure with safety valve arranged outside machine |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3891344A (en) * | 1972-10-14 | 1975-06-24 | Westinghouse Electric Corp | Steam turbine system with digital computer position control having improved automatic-manual interaction |
US3994623A (en) * | 1975-02-11 | 1976-11-30 | Compressor Controls Corporation | Method and apparatus for controlling a dynamic compressor |
CH617247A5 (en) * | 1977-06-30 | 1980-05-14 | Charmilles Sa Ateliers | |
US4217617A (en) * | 1978-09-22 | 1980-08-12 | General Electric Company | Turbine trip circuit |
US4318093A (en) * | 1980-02-25 | 1982-03-02 | General Electric Company | Logic circuit monitor |
US4464577A (en) * | 1982-06-18 | 1984-08-07 | General Electric Company | Turbine speed control |
US6853930B2 (en) * | 2001-02-27 | 2005-02-08 | Hitachi, Ltd. | System for aiding the preparation of operation and maintenance plans for a power generation installation |
GB2427972A (en) * | 2005-07-01 | 2007-01-10 | Ics Triplex Technology Ltd | Turbine speed monitor and overspeed trip |
CN110080837B (en) * | 2019-06-06 | 2023-12-08 | 东方电气自动控制工程有限公司 | Control module adopting three-out-of-two logic voting |
-
0
- BE BE790020D patent/BE790020A/en unknown
-
1971
- 1971-10-14 US US00189322A patent/US3829232A/en not_active Expired - Lifetime
-
1972
- 1972-09-28 CA CA152,719A patent/CA993508A/en not_active Expired
- 1972-09-29 DE DE19722248042 patent/DE2248042A1/en active Pending
- 1972-10-03 ZA ZA727070A patent/ZA727070B/en unknown
- 1972-10-06 GB GB4612572A patent/GB1411814A/en not_active Expired
- 1972-10-10 CH CH1478572A patent/CH547442A/en not_active IP Right Cessation
- 1972-10-10 AT AT868372A patent/AT319977B/en active
- 1972-10-13 NL NL7213866A patent/NL7213866A/xx unknown
- 1972-10-13 IT IT30461/72A patent/IT968942B/en active
- 1972-10-13 FR FR7236349A patent/FR2157478A5/fr not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2461610A (en) * | 2008-07-10 | 2010-01-13 | Gen Electric | Method and system to facilitate over-speed protection |
GB2461610B (en) * | 2008-07-10 | 2012-01-11 | Gen Electric | Methods and systems to facilitate over-speed protection |
US8224552B2 (en) | 2008-07-10 | 2012-07-17 | General Electric Company | Methods and systems to facilitate over-speed protection |
US8321119B2 (en) | 2008-07-10 | 2012-11-27 | General Electric Company | Methods and systems to facilitate over-speed protection |
CN103850724A (en) * | 2012-11-29 | 2014-06-11 | 中广核工程有限公司 | System and method for achieving emergent shutdown of steam turbine in nuclear power station |
CN103850724B (en) * | 2012-11-29 | 2015-12-23 | 中广核工程有限公司 | A kind of nuclear power station realizes the system and method for steam turbine emergency shutdown |
CN115126552A (en) * | 2022-07-26 | 2022-09-30 | 中国船舶重工集团公司第七0四研究所 | Through-flow valve block structure with safety valve arranged outside machine |
CN115126552B (en) * | 2022-07-26 | 2024-06-04 | 中国船舶集团有限公司第七〇四研究所 | Flow valve group structure with safety valve arranged outside machine |
Also Published As
Publication number | Publication date |
---|---|
US3829232A (en) | 1974-08-13 |
CH547442A (en) | 1974-03-29 |
AU4750072A (en) | 1974-04-11 |
FR2157478A5 (en) | 1973-06-01 |
NL7213866A (en) | 1973-04-17 |
BE790020A (en) | 1973-04-12 |
CA993508A (en) | 1976-07-20 |
DE2248042A1 (en) | 1973-04-19 |
AT319977B (en) | 1975-01-27 |
IT968942B (en) | 1974-03-20 |
ZA727070B (en) | 1973-06-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |