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Publication numberUS3898441 A
Publication typeGrant
Publication dateAug 5, 1975
Filing dateNov 6, 1973
Priority dateNov 6, 1973
Also published asCA1031419A, CA1031419A1
Publication numberUS 3898441 A, US 3898441A, US-A-3898441, US3898441 A, US3898441A
InventorsGuy E Davis, Iii William D Ghrist, Ray C Hoover
Original AssigneeWestinghouse Electric Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Multiple computer system for operating a power plant turbine with manual backup capability
US 3898441 A
Abstract
The electric power plant including a steam generator and a steam turbine is operated by a control system including two redundant digital computers. Switching circuitry is provided for coupling one of the computers through interface equipment to the steam generator and the turbine and a generator according to programmed computer control. A data link is established between the computers to transfer manual/automatic status and other needed data from the control computer to the standby computer. A system is provided for detecting when certain hardware and software malfunctions have occurred and for responsively transferring control to the standby computer. The standby computer is tracked to the control computer so that control computer transfer can be made reliably without disturbing the electric power generation process. Manual backup controls are provided for the steam generator and the steam turbine and the system is organized to transfer particular or all control loops to manual operation manually under operator selection or automatically in response to the existence of certain conditions. The capability for transfer to manual control is interfaced with the computer transfer system.
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Description  (OCR text may contain errors)

Davis et a1.

1 1 MULTIPLE COMPUTER SYSTEM FOR OPERATING A POWER PLANT TURBINE WITH MANUAL BACKUP CAPABILITY [75] Inventors: Guy E. Davis, Martinez, Calif.; Ray

C. Hoover, Murrysville; William D. Ghrist, III, Washington, both of Pa,

[73] Assignee: Westinghouse Electric Corporation,

Pittsburgh, Pa,

[22] Filed: Nov. 6, 1973 [2]] Appl. No.: 413,271

[52] US. Cl 235/l5l.21; 444/1; 290/40 R;

[51] Int. Cl... Fld 17/02; Gb /00; G06f 15/06 [58] FieldofSearch ..235/151.21, 151.3,151;

[56] References Cited UNITED STATES PATENTS 3,552,872 l/197l Giras et a1. 415/17 3,555,251 1/1971 Shavit 235/151 3,561,216 2/1971 Moore,Jr.,, 60/73 3,564,273 2/1971 Cockrell 415/17 X 3,588,265 6/1971 Berry 415/17 X OTHER PUBLICATIONS Application of the Prodac 50 System to Direct Digital Control, J. C. Belz, G. .1. Kirk & P, S. Radcliffe, IEEE Intl. Conv. Rec. Part 3, 1965, pp. 102-122. Monitoring and Automatic Control in Steam Power Stations by Process Computer, E. Doetsch & G.

Aug. 5, 1975 Hirschberg, Siemens Review XXXV (1968), No. 12, pp. 471476.

[5 7} ABSTRACT The electric power plant including a steam generator and a steam turbine is operated by a control system including two redundant digital computers. Switching circuitry is provided for coupling one of the comput ers through interface equipment to the steam genera tor and the turbine and a generator according to pro grammed computer control. A data link is established between the computers to transfer manual/automatic status and other needed data from the control computer to the standby computer. A system is provided for detecting when certain hardware and software malfunctions have occurred and for responsively transferring control to the standby computer. The standby computer is tracked to the control computer so that Control computer transfer can be made reliably without disturbing the electric power generation pro cess. Manual backup controls are provided for the steam generator and the steam turbine and the system is organized to transfer particular or all control loops to manual operation manually under operator selection or automatically in response to the existence of certain conditions. The capability for transfer to man ual control is interfaced with the computer transfer system.

17 Claims, 4] Drawing Figures POWER DETECTOR DETECTOR so SPEED oerzcnou SYSTEM 44 f 2 HYDRAU L 1C ACTUATOR 46 HYDRAULIC ACTUATORS as as ZSESTEE ONTROLLER 5 DUE TOR CONTROL STE M DEV CESI T AM [22 seuisnme SYSTEM I I i 1" 1 I l I l 1 I I I I l L l TV4 STEAM 1 t sP 5P I 8 1 THROTTLE GOVER VALVE ALv'E POSITION u POSITION CONTROLS CONTROLS I ,40 I 42 %%%l%d "am VALVE VALVE ACTUATORS ACTUATORS t g HIGH pnsssuac HYDRAULIC FLUID SUPPLY PATENTED AUG 5|975 SHEET FIG. IB.

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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
US3978659 *Feb 19, 1975Sep 7, 1976Westinghouse Electric CorporationBumpless transfer in shifting control command between the primary and backup control systems of a gas turbine power plant
US4161027 *Oct 4, 1976Jul 10, 1979Electric Power Research Institute, Inc.Digital protection system for transmission lines and associated power equipment
US4276593 *Mar 30, 1979Jun 30, 1981Beckman Instruments, Inc.Transfer system for multi-variable control units
US4368520 *Sep 29, 1980Jan 11, 1983Westinghouse Electric Corp.Steam turbine generator control system
US4486148 *May 17, 1982Dec 4, 1984Michigan Consolidated Gas CompanyMethod of controlling a motive power and fluid driving system
US4635209 *Oct 31, 1984Jan 6, 1987Westinghouse Electric Corp.Overspeed protection control arrangement for a steam turbine generator control system
US7146257 *Mar 28, 2003Dec 5, 2006Kabushiki Kaisha ToshibaElectric power plant general control system
US7584024 *Feb 8, 2005Sep 1, 2009Pegasus Technologies, Inc.Method and apparatus for optimizing operation of a power generating plant using artificial intelligence techniques
US8340824Oct 5, 2007Dec 25, 2012Neuco, Inc.Sootblowing optimization for improved boiler performance
US8498746Sep 7, 2012Jul 30, 2013Neuco, Inc.Sootblowing optimization for improved boiler performance
US8973535 *Feb 14, 2011Mar 10, 2015Honeywell International Inc.Steam-generator temperature control and optimization
US9058029 *Mar 31, 2011Jun 16, 2015Brad RadlSystem and method for creating a graphical control programming environment
US9163828Oct 31, 2011Oct 20, 2015Emerson Process Management Power & Water Solutions, Inc.Model-based load demand control
US9217565 *Feb 7, 2011Dec 22, 2015Emerson Process Management Power & Water Solutions, Inc.Dynamic matrix control of steam temperature with prevention of saturated steam entry into superheater
US20050228545 *Mar 28, 2003Oct 13, 2005Toshihiko TanakaElectric power plant general control system
US20060178762 *Feb 8, 2005Aug 10, 2006Pegasus Technologies, Inc.Method and apparatus for optimizing operation of a power generating plant using artificial intelligence techniques
US20110131995 *Jun 9, 2011Honeywell International Inc.Steam-generator temperature control and optimization
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
US20120253479 *Mar 31, 2011Oct 4, 2012Brad RadlSystem and Method for Creating a Graphical Control Programming Environment
Classifications
U.S. Classification700/287, 60/646, 415/1, 290/40.00R, 700/82, 714/E11.81
International ClassificationG06F11/20
Cooperative ClassificationG06F11/2097, G06F11/2038, G06F11/2028
European ClassificationG06F11/20P6, G06F11/20U