Boots – shoes – and leggings
Patent
1973-10-05
1978-05-16
Wise, Edward J.
Boots, shoes, and leggings
290 40R, 415 15, 60645, 364300, 364110, G05B 1500, F01D 1702
Patent
active
040900657
ABSTRACT:
A steam turbine is provided with an automatic digital computer controller and a backup analog controller which are interfaced with an electrohydraulic position control for the turbine throttles and governor valves. Valve position signals are generated by transducers and applied to the valve position control along with position setpoint signals from the computer or the backup controller for the purpose of generating valve control signals which drive the valves until the position setpoints are satisfied. The position signals are also applied to the computer where they are compared to the computer valve position setpoints. The automatic controller and the analog backup controller each have a speed/load control which generates the valve position setpoints in accordance with a speed or load reference, and the backup control tracks the computer setpoints during automatic control. The backup control position setpoint signals are also applied to the computer during automatic control there they are also compared to the computer valve position setpoints. If any comparison results in a difference in excess of a predetermined deadband valve, the computer generates a contingency signal to indicate a valve not functioning or backup not tracking.
REFERENCES:
patent: 3552872 (1971-01-01), Giras et al.
patent: 3555251 (1971-01-01), Shavit
patent: 3561216 (1971-02-01), Moore, Jr.
patent: 3564273 (1971-02-01), Cockrell
patent: 3588265 (1971-06-01), Berry
Application of the Prodac 50 System to Direct Digital Control, J. C. Belz, G. J. 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. Hirschberg, Siemens Review XXXV(1968) No. 12, pp. 471-476.
Braytenbah Andrew
Podolsky Leaman
Possessky E. F.
Westinghouse Electric Corp.
Wise Edward J.
LandOfFree
System and method for operating a steam turbine with protection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for operating a steam turbine with protection , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for operating a steam turbine with protection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1198734