GB1519833A - Turbine overspeed control systems - Google Patents

Turbine overspeed control systems

Info

Publication number
GB1519833A
GB1519833A GB39331/75A GB3933175A GB1519833A GB 1519833 A GB1519833 A GB 1519833A GB 39331/75 A GB39331/75 A GB 39331/75A GB 3933175 A GB3933175 A GB 3933175A GB 1519833 A GB1519833 A GB 1519833A
Authority
GB
United Kingdom
Prior art keywords
range
command signal
speed
steam
valve
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
Application number
GB39331/75A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1519833A publication Critical patent/GB1519833A/en
Expired legal-status Critical Current

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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type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

Abstract

1519833 Automatic control of speed GENERAL ELECTRIC CO 25 Sept 1975 [4 Oct 1974] 39331/75 Heading G3R For overspeed conditions, a steam valve in a steam turbine is controlled towards a closed position, by a non-linear command signal, so as to compensate for the non-linear relationship between valve movement and steam flow. In the embodiment, provided the turbine speed Vs is greater than the desired value A e.g. due to decrease in load, the command signal Vout is proportional to the overspeed error i.e. the difference between the actual speed and value A. In the range B, where the change in valve position has only a small effect on the steam flow, the command signal rises at a faster rate than in range D, where the valve position change has a more substantial effect on the steam flow. For larger errors, in range E, the command signal is limited. The command signal is generated Fig. 3 (not shown) by an amplifier (42) whose output is modified in range D by a further amplifier (61) and limited for measured values of turbine speed (using a voltage proportional to speed) less than the pre-set value A or in the range E.
GB39331/75A 1974-10-04 1975-09-25 Turbine overspeed control systems Expired GB1519833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US512808A US3913329A (en) 1974-10-04 1974-10-04 Turbine overspeed control system

Publications (1)

Publication Number Publication Date
GB1519833A true GB1519833A (en) 1978-08-02

Family

ID=24040665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39331/75A Expired GB1519833A (en) 1974-10-04 1975-09-25 Turbine overspeed control systems

Country Status (5)

Country Link
US (1) US3913329A (en)
JP (1) JPS5162203A (en)
CA (1) CA1038474A (en)
CH (1) CH599454A5 (en)
GB (1) GB1519833A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH621179A5 (en) * 1977-06-29 1981-01-15 Bbc Brown Boveri & Cie
DE2939534B2 (en) * 1979-09-28 1981-06-25 Kraftwerk Union AG, 4330 Mülheim Control device for steam turbines with reheating
AR029828A1 (en) * 2001-07-13 2003-07-16 Petrobras En S A METHOD FOR PRIMARY FREQUENCY REGULATION IN COMBINED CYCLE STEAM TURBINES
US7343744B2 (en) * 2005-07-27 2008-03-18 General Electric Company Method and system for controlling a reheat turbine-generator
EP2466077A1 (en) * 2010-12-17 2012-06-20 Alstom Technology Ltd Steam turbine overspeed protection
US9765636B2 (en) 2014-03-05 2017-09-19 Baker Hughes Incorporated Flow rate responsive turbine blades and related methods

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524091A (en) * 1970-05-26 1972-06-15 Sulzer Ag Device for shutting off a work medium

Also Published As

Publication number Publication date
CA1038474A (en) 1978-09-12
JPS5624763B2 (en) 1981-06-08
DE2542936B2 (en) 1977-04-21
US3913329A (en) 1975-10-21
DE2542936A1 (en) 1976-04-22
JPS5162203A (en) 1976-05-29
AU8276875A (en) 1977-01-06
CH599454A5 (en) 1978-05-31

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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

Effective date: 19920925