Governing system for use in sliding-pressure type turbine power

Details Governing system for use in sliding-pressure type turbine power Governing system for use in sliding-pressure type turbine power

1978-05-30

1980-05-20

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having condition responsive control

290 52, F01K 1302

Patent

active

042032970

ABSTRACT:
A governing system for use in a sliding-pressure type turbine power plant, in which a target level for a main steam pressure is automatically set in response to a load demand, while two or more regulating valves are controlled according to a valve-positioning signal so as to eliminate a deviation of an actual load from a load demand, whereupon a target level for the main steam pressure is corrected, based on the diviation of the actual opening from the target opening of each regulating valve, whereby the main pressure generated in a boiler is regulated to a corrected target level. This governing system includes a valve driving mechanism functioning such that all regulating valves be opened at a time in a range up to a given opening, and thereafter the regulating valves be opened one after another, commensurate to the magnitude of a control signal, after entering a range beyond the aforenoted given opening.

REFERENCES:
patent: 3097488 (1963-07-01), Eggenberger
patent: 3545207 (1970-12-01), Barber
patent: 4120159 (1978-10-01), Matsumoto

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