Boots – shoes – and leggings
Patent
1994-03-31
1996-05-14
Voeltz, Emanuel T.
Boots, shoes, and leggings
395900, 395907, 307 39, 60645, 290 52, H02J 312
Patent
active
055174248
ABSTRACT:
A method for automated control of a steam turbine during cyclic operation includes the steps of comparing current turbine loading with an anticipated load profile to generate a load error signal. Anticipated electrical load profiles correspond to the time of day, day of the week, month of the year, and historical data; operator input can vary such historical profiles as appropriate for unusual situations. The predicted load profile is categorized with respect to selected composite electrical load cycle profiles; weighted operating constraints are generated by means of a fuzzy inference calculation using electrical cycle profiles selected to correspond to the anticipated electrical load profile. Control signals for selected steam plant regulatory functions, such as steam supply valve position and boiler pressure, are produced by applying the fuzzy logic-generated weighted operating constraints and the load error signal so as to optimize turbine load-following efficacy, steam plant efficiency, and machinery stress reduction. These control signals are then applied to respective regulatory function actuators in the steam plant to implement the desired trajectory of steam plant operation.
REFERENCES:
patent: 4792911 (1988-12-01), Gonzalez et al.
patent: 5305230 (1994-04-01), Matsumoto et al.
patent: 5309485 (1994-05-01), Chao
patent: 5311421 (1994-05-01), Nomura et al.
patent: 5392320 (1995-02-01), Chao
patent: 5433079 (1995-07-01), Badami et al.
Mamdani E. H., et al., "Application of fuzzy algorithms for control of simple dynamic plant," Proceedings of IEE: Control & Science, vol. 121, No. 12, Dec. 1974, pp. 1585-1588.
Matsumoto, H., et al., "An operation support expert system based on on-line dynamics simulation and fuzzy . . . ," IEEE Trans. on Energy Conversion., vol. 8, No. 4, Dec. 1993, pp. 674-680.
A. Khotanzad, R.-C. Hwang, and D. Maratukulam, "Hourly Load Forecasting by Neural Networks," in IEEE Power Engineering Society Winter Meeting, (Columbus, OH), Feb. 1993.
A F. Armor, R. D. Hottenstein, I. A. Diaz-Tous, and N. F. Lansing, "Cycling Capabilty of Supercritical Turbines: A World Wide Assessment," in Fossil Plant Cycling Workshop, (Miami Beach, FL), 1985.
F. J. Hanzalek and P. G. Ipsen, "Boiler-Turbine Coordination during Startup and Loading of Large Units," in American Society of Mechanical Engineers, (Chicago, IL), Nov. 7-11, 1965.
J. Jelinek, "Cycling controllers for electric utilities," in EPRI Conference on Power Plan Controls and Automation, 1989.
K. Anderson, "Advanced control technology to reduce power plant stress," in ASME Publication, Paper #90-JPGC/Pwr-2, Boston, MA, Oct. 1990.
D. B. P. Gibbs, "Nonlinear model predictive control for fossil power plants," in Proc. American Control Conf., pp. vol. 4, pp. 3091-3098, Chicago, IL, Jun. 1992.
D. P. B. P. Gibbs, D. S. Weber, "Application of nonlinear model-based predictive control to fossil power plants," in Proc. 30th IEEE Conf. on Decision and Control, Dec. 1992.
H. F. Martin and J. G. J. Silvestri, "Turbine Cycle Performance Optimization," in EPRI Heat Rate Improvement Conference, (Richmond, VA), May 10-12 (1988).
C. C. Lee, "Fuzzy Logic in Control Systems: Fuzzy Logic Controller I and II," IEEE Systems, Man, and Cybernetics, vil. 20, No. 2, 1990.
C. E. Garcia and A. Morshedi, "Quadratic Programming Solution of Dynamic Matrix Control (QDMC)." Chem. Eng. Comun., vol. 46, pp. 073-087, 1986.
Bonissone Piero P.
Chiang Kenneth H.
Houpt Paul K.
Marcelle Kenneth A. W.
Weiss Joseph
Choi Kyle J.
Electric Power Research Institute Inc.
Voeltz Emanuel T.
LandOfFree
Steam turbine fuzzy logic cyclic control method and apparatus th does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steam turbine fuzzy logic cyclic control method and apparatus th, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steam turbine fuzzy logic cyclic control method and apparatus th will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1901528