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Publication numberUS3911286 A
Publication typeGrant
Publication dateOct 7, 1975
Filing dateSep 11, 1973
Priority dateApr 26, 1972
Publication numberUS 3911286 A, US 3911286A, US-A-3911286, US3911286 A, US3911286A
InventorsRobert Uram
Original AssigneeWestinghouse Electric Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
System and method for operating a steam turbine with a control system having a turbine simulator
US 3911286 A
Abstract
A steam turbine is provided with an automatic digital computer control and a backup analog control which function in load and speed control loops during the positioning of the turbine inlet valves for speed and load control. An operator panel is provided with a test switch for transferring the turbine operation to backup control and for connecting the automatic control to a turbine simulator stored in the computer when it is desired to use the on-line computer for training, checkout or maintenance without disturbing the power generation process.
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Uram

Oct. 7, 1975 SYSTEM AND METHOD FOR OPERATING A STEAM TURBINE WITH A CONTROL SYSTEM HAVING A TURBINE SIMULATOR OTHER PUBLICATIONS Application of the Prodac 50 System to Direct Digital 1 Inventors: RobertUram, East i b Pa. Control; .I. c. Belz, o. J. Kirk & P. s. Radcliffe, IEEE 1 Int]. Con Ree, Part 3, 1965, 102-122. [73] Assignee: Westinghouse Electric Corporation, pp

pimburgh Pa Momtormg and Automatic Control In Steam Power Stations by Process Computer, E. Doetsch & G. [22] Fil d p 1973 Hirschberg, Siemens Review XXXV (1968), No. 12, 1211 Appl. No.: 396,160 471-476 Primary ExaminerEugene G. Botz Related US Application Data Asszstant Exammer-Edward J. WIse A Attorney, Agent, or FIrmE. F. Possessky [63] ContInuatIon of Scr. No. 247,852, April 26, 1972,

abandoned.

[57] ABSTRACT [52] 290/40; 235/15121; 60/646; A steam turbine is provided with an automatic digital 444/1 computer control and a backup analog control which IIII. f i i d and speed control loops during the [58] held of Search 235/5121 15134 1513 positioning of the turbine inlet valves for speed and 235/15 1; 415/17; 60/64 66; 290/40 load control. An operator panel is provided with a test 40 F; 340/1725; 444/1 switch for transferring the turbine operation to backup I control and for connecting the automatic control to a [56] References C'ted turbine simulator stored in the computer when it is de- UNITED STATES PATENTS sired to use the on-line computer for training, check- 3,552,872 l/l971 Giras et al. 415/17 out or maintenance without disturbing the power gen- 3,555,251 [/1971 Shavit v. 235/151 eration process. 3,561,216 2/1971 Moore, Jr. 60/73 D 3,564,273 2 1971 Cockrcll 415/17 x 39 Clams, 35 Drawing Flgures o e POWER lMPULSE DETECTOR PRESSURE l9 DETECTOR STEAM LOAD GVI - 2 20 11+ Q 22 .4 l I I H.F. LP. L2 :3 lgfig flfi TURBINE TURBINE TURBINE GENERATOR 5151-5 SECTION SECTION SECTION eve l STEAM REHEATER sv lV CONDENSER l ass 1 L L29 J C55 ol ANALOG DIGITAL SPEED SPEED DETECTOR DETECTOR 52 HYDRgl/JLIC 58] 1.59 355% ACTUATOR POSITI N 12. CONTROLS 44 I HYDRAULIC HYDRAULIC GOVVERNOR ACTUIAYI'ORS 56 AcTuAT Rs 49 11/ 7 posmou HIGH PRESSURE CONTROLS HYDRAULIC FLUID SUPPLY Berry 415/17 X U. S. Pat ent Oct. 7,1975 Sheet2 of 28 3,911,286

U.S. Patent -0 ;t. 7,1975 Sheet-4 of 28 3,911,286

mm OE US. Patent Oct. 7,1975 Sheet 5 of 23 3,911,286

US. Patent Oct. 7,1975 Sheet 6 of 28 3,911,286

US. Patent Oct. 7,1975 Sheet 7 Of28 3,911,286

"26 PLANT gm 2 COMMANDER TASK L DATA TAS K LINK I852 INTERRUPT T T ERROR f SE%L\J/%NNCTES OF PANEL LAMPS INTERRUPT PROGRAM "58x VALVE L I852] INTERRUPT PLANT CCI 15 suBROuTINE REFERENCfl .854 III2 m0 H28 I r r sTATus xf af gu PANEL PANEL LOGIC LI mgs TASK TASKS I NTERRUPT CONTACTS I9IO OPERATOR S SPEED PANEL "56 SELECTION TURBINE BUTTONS PROGRAM 2022 TRIP "so DECODER INTERRUPT L|85O f Z5553 I??? #0 TASK I CHANNEL \-20I8 85%? ERROR INTERRUPT I LQCELLEE B2 l CONTROL VALVES 1 MONITOR AUXILIARY TASK sTOP SYNCHRONIZER L 1 INITIAL TASK 52 {I814 sPOLOOP TI PRE-sET r LOAD VALVE FLASH cONTROL POSITON ./|8l2 L TASK OLOsE Gv H36 Hi6 ANALOG SCAN BREAKER H41] TASK OPEN NTERRuPT ATS 34 I L vIsuAL BREAKER DISPLAY TASK II40- ATs PERIODCS CONTAiT1OLtJTPUTS TEST ATS H48 42/ ANALOG H TAS K CONVERSION ANALOG 1 ROUTINE DISPLAY DIGITAL 1/0 PR RAMM R MEssAGE F n44 WRITER CONSOLE TASK LOGGING TRENO TYPEWRITER RECORDER Sheet 11 of 28 3,911,286

U.S. Patent Oct. 7,1975

U.S. Pat ent 00. 7,1975 Sheet '17 of 22 3- 3,911,286

I24 /I I I0 SEQUENCE OF LOG: EVENTS TASK INTERRUPT PROGRAM CONTACT LOGIC mpuvs sures AUXILIARY 32 CONTROL MEL SYNCHRONIZER ANALOG OUTPUTS TASK EVERY TASK w,

sec Hi4 IOI2 ANALOG INPUTS ANALOG so: I

TASK Ans U.S. Pat ent 0m. 7,1975 Sheet 19 of 28 3,911,286

u h #OmuZOU vwdw 0-004 VNQI

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3552872 *Apr 14, 1969Jan 5, 1971Westinghouse Electric CorpComputer positioning control system with manual backup control especially adapted for operating steam turbine valves
US3555251 *Dec 6, 1967Jan 12, 1971Honeywell IncOptimizing system for a plurality of temperature conditioning apparatuses
US3561216 *Mar 19, 1969Feb 9, 1971Gen ElectricThermal stress controlled loading of steam turbine-generators
US3564273 *Nov 9, 1967Feb 16, 1971Gen ElectricPulse width modulated control system with external feedback and mechanical memory
US3588265 *Apr 19, 1968Jun 28, 1971Westinghouse Electric CorpSystem and method for providing steam turbine operation with improved dynamics
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4029951 *Oct 21, 1975Jun 14, 1977Westinghouse Electric CorporationTurbine power plant automatic control system
US4096699 *Feb 23, 1977Jun 27, 1978Westinghouse Electric Corp.Auxiliary manual turbine controller
US4270055 *Dec 30, 1977May 26, 1981Westinghouse Electric Corp.System and method for transferring the operation of a turbine-power plant between single and sequential modes of turbine valve operation
US4490808 *Mar 31, 1982Dec 25, 1984Hydro QuebecElectronic simulator for the simulation of a hydro-turbine
US4794544 *Mar 26, 1987Dec 27, 1988Woodward Governor CompanyMethod and apparatus for automatically index testing a kaplan turbine
US5621654 *Apr 15, 1994Apr 15, 1997Long Island Lighting CompanySystem and method for economic dispatching of electrical power
US7275025 *Dec 27, 2000Sep 25, 2007General Electric CompanyMethod and system for analyzing performance of a turbine
US7288921 *Jun 25, 2004Oct 30, 2007Emerson Process Management Power & Water Solutions, Inc.Method and apparatus for providing economic analysis of power generation and distribution
US7385300Mar 13, 2007Jun 10, 2008Emerson Process Management Power & Water Solutions, Inc.Method and apparatus for determining actual reactive capability curves
US7474080Sep 12, 2007Jan 6, 2009Emerson Process Management Power & Water Solutions, Inc.Method and apparatus for providing economic analysis of power generation and distribution
US8014992 *May 31, 2007Sep 6, 2011William H SmithElectric power system training simulation software and process for electric power system training
US8744634 *Nov 19, 2010Jun 3, 2014General Electric CompanySafety instrumented system (SIS) for a turbine system
US20120040299 *Feb 7, 2011Feb 16, 2012Emerson Process Management Power & Water Solutions, Inc.Dynamic matrix control of steam temperature with prevention of saturated steam entry into superheater
US20120130553 *Nov 19, 2010May 24, 2012General Electric CompanySafety instrumented system (sis) for a turbine system
Classifications
U.S. Classification290/40.00R, 703/3, 700/84, 700/6, 703/18, 60/646, 700/82
International ClassificationF01D17/24
Cooperative ClassificationG06K13/0825, F01D17/24
European ClassificationG06K13/08A4, F01D17/24