System and method for operating a steam turbine with digital computer control having integrator limit
Patent
·
OSTI ID:6518332
A system and method are described for automatically starting, synchronizing and operating a steam turbine, proportional plus integral feedback control utilizing digital computer systems is adapted to correspond to physical valve operation by applying integration limits. Useful for both speed and load control modes of operation, the demand signal is compared with prior values thereof, and the differential is both multiplied by a proportional gain factor, and integrated in the computer utilizing numerical integration techniques. The integrated total is kept within a desired range by applying upper and lower limits, and the limited integral is combined with the proportional factor, further limited, as desired, and appropriately scaled for use as a process variable.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 4053746
- OSTI ID:
- 6518332
- Country of Publication:
- United States
- Language:
- English
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