Back to results
US 4,355,514 AGranted
Control device for steam turbines with reheater
AssigneeKraftwerk Union Aktiengesellschaft
InventorRolf Reifenberg
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeKraftwerk Union Aktiengesellschaft
InventorRolf Reifenberg
Estimating the term…
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.
Control device for a steam turbine having a high-pressure and a medium or low-pressure turbine part, comprising 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 said reheater, control means having at least one turbine controller for simultaneously acting on said live steam control valve in accordance with a predetermined live steam valve characteristic and acting on said intercept control valve in accordance with a predetermined intercept valve characteristic, said live steam control valve and said intercept control valve having a normal characteristic correlation therebetween determining a correlation of high-pressure and medium or low-pressure steam mass flow, limit detecting means associated with said high-pressure turbine part for responding when a predetermined thermal stress is reached in said high-pressure turbine part, and positioning means controlled by said limit detecting means for changing said normal characteristic correlation and increasing said high-pressure steam mass flow in said steam mass flow correlation.
Dependencies are inferred from the claim text.