Turbine control system

Details Turbine control system Turbine control system

G - Physics

05

D

341/96

G05D 13/62 (2006.01) F01D 17/18 (2006.01) F01D 17/24 (2006.01)

Patent

CA 1047626

TURBINE CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE A turbine control system for changing over a throt- tle governing operation of a steam turbine to a nozzle governing operation thereof and vice versa by controlling control valves on the basis of a main control flow-rate request signal comprises function generators grouped according to the two governing operations and operating to produce function outputs in response to the opening degrees of the control valves. The function outputs are biased according to the two governing operation and applied to respective high-value gates, the output signals of which are compared with the main control flow-rate request signal to control the opening degrees of the control valves in such a manner that the flow rate of steam introduced through the control valves into the steam turbine are maintained constant during the speed govern- ing operation changing period.

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