Power plants – Motive fluid energized by externally applied heat – Having condition responsive control
Patent
1980-09-29
1982-10-26
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Having condition responsive control
60657, F01K 1302
Patent
active
043555144
ABSTRACT:
Control device for a steam turbine having a high-pressure and a medium or low-pressure turbine part, includes a reheater, at least one live steam control valve disposed upstream of the high-pressure turbine part, at least one intercept control valve disposed upstream of the medium or low-pressure turbine part and downstream of the reheater, a control device having at least one turbine controller for simultaneously acting on the live steam control valve in accordance with a predetermined live steam valve characteristic and acting on the intercept control valve in accordance with a predetermined intercept valve characteristic, the live steam control valve and the intercept control valve having a normal characteristic correlation therebetween determining a correlation of high-pressure and medium or low-pressure steam mass flow, a limit detecting device associated with the high-pressure turbine part for responding when a predetermined thermal stress is reached in the high-pressure turbine part, and a positioning device controlled by the limit detecting device for changing the normal characteristic correlation and increasing the high-pressure steam mass flow in the steam mass flow correlation.
REFERENCES:
patent: 3561216 (1971-02-01), Moore, Jr.
patent: 3913329 (1975-10-01), Priluck
patent: 3928972 (1975-12-01), Osborne
Greenberg Laurence A.
Husar Stephen F.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Ostrager Allen M.
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