GB1265841A - - Google Patents
Info
- Publication number
- GB1265841A GB1265841A GB1265841DA GB1265841A GB 1265841 A GB1265841 A GB 1265841A GB 1265841D A GB1265841D A GB 1265841DA GB 1265841 A GB1265841 A GB 1265841A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- valve
- turbine
- control
- responsive
- 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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/24—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical electrical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
1,265,841. Programmed control. WESTINGHOUSE ELECTRIC CORP. March 28, 1969 [April19, 1968], No.16330/69. Heading G3N. [Also in Division F1] The flow of steam through at least one section of a steam turbine is determined by a steam valve controlled by a system responsive to a steam valve position demand, determined in accordance with a predetermined characterization required to satisfy an input demand for an operating variable placed under end control, which is correctively modified by the error between the actual and input demand valves of the variable. As shown, Fig.1 a three-stage axial flow turbine 10, driving an A .C . generator 16, is supplied at a constant steam pressure from a drum type steam boiler 26. The turbine is fed through throttle-inlet valves TV1-TV4 and governor-inlet valves GV1 -GV8 arcuately spaced about the turbine high-pressure casing. The turbine highpressure section 20 is interconnected with the intermediate pressure section 22 through a reheater 28, stop-valves SV preventing steam back flow and intercept valves IV provide overspeed protection. The low-pressure section 24 exhausts to a condenser 32. During start-up the valves GV1-GV8 are initially fully open and control is through valves TV1-TV4, at transfer the valves TV1-TV4 are fully open and valves GV1 -GV8 are operated in a predetermined sequence to reduce thermal stress. The valves TV1 are positioned by hydraulic actuators 42 controlled by position controls 50 responsive to position feedback from detectors PDT1-PDT4. Similarly, valves GV1-GV8 are positioned by actuators 44 operated by controls 52 responsive to position feedback from detectors PDG1-PDG8. The valves SV, IV are positioned by hydraulic actuators 46, 48, the valve IV being operated by a control 56 responsive to position feedback from a detector PD1 and the position of the valve SV is indicated by status contacts CSS. The signals from the valve position detectors PDTI-PDT4, PDG1-PDG8, PD1 status contacts GSS, a generated power detector 18, a phonicwheel speed detector 58, an impulse pressure detector 40 and a throttle pressure detector 38 are employed in a programmed computer operating system 60, Fig.2. The central processor 62 is interfaced with the turbine operating conditions through 1) a contact closure input system 64, responsive to interlock and protection status contacts 66 and the SV valve status contacts CSS, 2) an analogue input system 72, responsive to, impulse pressure and power detectors 40, 18 intercept throttle and governor valve position detectors PD1-PDG8 and miscellaneous sensors 74 comprising generator hydrogen coolant pressure and temperature detectors, (not shown) and 3) a pulse input system responsive to the speed detector 58. The control programme is entered into the central processor core through a tape reader system 78, datalogging being effected by a teletypewriter system 80 and a printer 82, and display by a device 98. The transfer of information through the computer'is effected by an interrupt system 84. The processor 62 carries out a plurality of control programmes, which are described in detail, whereby signals are derived to determine through a contact closure system 86 1) analogue outputs from a system 88 to auxiliary devices such as the hydrogen coolant system, (not shown), 2) alarm devices 94, 3) HP valve fluid and lubrication control by a system 87 and, 4) valve positioning signals from a system 90 to controls 50, 56, 52. A start signal is initiated manually through a supervisory control 68 and start-up cleared by interlock permissives, a throttle and governor valve programme is then periodically executed to bring the turbine up to synchronous speed, at a rate determined by a stored ramp curve of turbine speed versus time, through a feedback control loop operation. On load, a load reference demand signal is applied in a feed-forward load control loop which includes the programmed processor 62 the governor controls 52 and the governor valves GV1-GV8 with their position detectors PDG1-PDG8. A load reset feedback loop, employing the impulse pressure detector 40, applies a steady state correction to the load reference by being cascaded into the feed-forward load control loop.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72277968A | 1968-04-19 | 1968-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1265841A true GB1265841A (en) | 1972-03-08 |
Family
ID=24903352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1265841D Expired GB1265841A (en) | 1968-04-19 | 1969-03-28 |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE731550A (en) |
CA (1) | CA941492A (en) |
CH (1) | CH511365A (en) |
DE (1) | DE1919363A1 (en) |
FR (1) | FR2006555A1 (en) |
GB (1) | GB1265841A (en) |
NL (1) | NL6906078A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102536348A (en) * | 2010-12-16 | 2012-07-04 | 通用电气公司 | Method and system for controlling a valve of a turbomachine |
CN112888845A (en) * | 2018-05-09 | 2021-06-01 | Abb瑞士股份有限公司 | Turbine control system |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1433612A (en) * | 1972-04-24 | 1976-04-28 | Westinghouse Electric Corp | System for controlling and simulating operation of an electric pwer plant |
CN103033389B (en) * | 2012-12-29 | 2015-12-23 | 昆明醋酸纤维有限公司 | A kind of method of stand-by boiler interlock test of proterctive equipment |
CN113217119A (en) * | 2021-05-11 | 2021-08-06 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Stability judgment method for steam turbine speed regulating system |
-
1969
- 1969-03-28 GB GB1265841D patent/GB1265841A/en not_active Expired
- 1969-03-28 CA CA047,107A patent/CA941492A/en not_active Expired
- 1969-04-15 BE BE731550D patent/BE731550A/xx not_active IP Right Cessation
- 1969-04-16 DE DE19691919363 patent/DE1919363A1/en active Pending
- 1969-04-17 CH CH584969A patent/CH511365A/en not_active IP Right Cessation
- 1969-04-18 NL NL6906078A patent/NL6906078A/xx unknown
- 1969-04-18 FR FR6912220A patent/FR2006555A1/fr not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102536348A (en) * | 2010-12-16 | 2012-07-04 | 通用电气公司 | Method and system for controlling a valve of a turbomachine |
EP2508720A3 (en) * | 2010-12-16 | 2014-02-19 | General Electric Company | Method and system for controlling a valve of a turbomachine |
US9080466B2 (en) | 2010-12-16 | 2015-07-14 | General Electric Company | Method and system for controlling a valve of a turbomachine |
CN102536348B (en) * | 2010-12-16 | 2015-11-25 | 通用电气公司 | Restriction enters the method for the steam flow of turbo machine and improves the method and system of powered device flexibility |
CN112888845A (en) * | 2018-05-09 | 2021-06-01 | Abb瑞士股份有限公司 | Turbine control system |
Also Published As
Publication number | Publication date |
---|---|
CH511365A (en) | 1971-08-15 |
BE731550A (en) | 1969-09-15 |
NL6906078A (en) | 1969-10-21 |
CA941492A (en) | 1974-02-05 |
FR2006555A1 (en) | 1969-12-26 |
DE1919363A1 (en) | 1969-10-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |