Turbine control system

Details Turbine control system Turbine control system

1975-09-04

1976-09-21

Husar, C. J.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

With input signal of independent condition

415 17, 290 40R, F01B 2504

Patent

active

039816087

ABSTRACT:
A turbine control system for changing two speed governing operations of a steam turbine from a throttle governing operation to a nozzle governing operation and vise versa by controlling steam control valves comprises function generators grouped according to the two speed governing operations and operated by a main control flow-rate request signal to produce function outputs which are applied to respective low-value gate circuits, means for comparing the sum of the outputs of the gate circuits and the main control flowrate request signal, and means for varying the main control flowrate request signal with the aid of the difference between the signals thus compared in such a manner that while one of the outputs of the gate circuits decreases, the other output increases to supplement the decrease, whereby the steam control valves are gradually operated with the output of the turbine being kept unchanged during the operating mode changing operation.

REFERENCES:
patent: 3340883 (1967-09-01), Peternel
patent: 3342195 (1967-09-01), Wagner
patent: 3446224 (1969-05-01), Zwicky, Jr.
patent: 3452258 (1969-06-01), Thompson
patent: 3757130 (1973-09-01), Uchiyama et al.
patent: 3891344 (1975-06-01), Brayenbah

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