Boots – shoes – and leggings
Patent
1973-11-06
1977-10-11
Wise, Edward J.
Boots, shoes, and leggings
290 40R, 60645, 415 15, 364101, 364108, F01D 1702, G05B 1500, G06F 1506
Patent
active
040537471
ABSTRACT:
An 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. In order to provide for making a noncontrolling computer available for control in a reliable and fast manner after it has been stopped for any reason, the system is arranged to structure the noncontrolling computer with certain initializing data over the data link. The initialization data includes turbine rotor stress calculated variables and other variables including boiler and turbine logicals and calibration variables.
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.
Possessky E. F.
Westinghouse Electric Corporation
Wise Edward J.
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