Steam turbine control system and method of controlling the ratio

Details Steam turbine control system and method of controlling the ratio Steam turbine control system and method of controlling the ratio

1976-10-19

1978-10-17

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having condition responsive control

415 17, 290 40C, 364494, F22D 112

Patent

active

041201590

ABSTRACT:
In a steam turbine-generator with means for determining a load demand signal in accordance with a load reference signal, means for determining the valve opening under each admission mode of full-arc and partial-arc in accordance with said load demand signal and means for adjusting the ratio between valve openings under the each admission mode in accordance with a load change the ratio of steam flow under each of the admission modes is controlled in accordance with a load change so as to minimize the thermal stresses and thereby reduce the turbine load changing time.

REFERENCES:
patent: 3097489 (1963-07-01), Eggenberger et al.
patent: 3561216 (1971-02-01), Moore
patent: 3723018 (1973-03-01), Uchiyama et al.
patent: 3956897 (1976-05-01), Zitelli et al.

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