초록 ▼

In a steam turbine used with a power plant operated under variable pressure of the steam which is fed to the turbine through control valves, the control apparatus is arranged to control the control valves according to a signal obtained by adding an opening set signal with a compensation signal which

In a steam turbine used with a power plant operated under variable pressure of the steam which is fed to the turbine through control valves, the control apparatus is arranged to control the control valves according to a signal obtained by adding an opening set signal with a compensation signal which is determined in dependence on a difference between a turbine stage steam pressure signal and a signal derived by multiplying the opening set signal with a ratio of the actual value of the control valve inlet steam pressure to a rated value thereof.

대표청구항 ▼

An apparatus for controlling a steam turbine of a thermal power plant operated under a variable steam pressure, the apparatus comprising means for detecting a turbine stage pressure and for supplying an output signal thereof, means for controlling an opening of control valve means provided at an inl

An apparatus for controlling a steam turbine of a thermal power plant operated under a variable steam pressure, the apparatus comprising means for detecting a turbine stage pressure and for supplying an output signal thereof, means for controlling an opening of control valve means provided at an inlet side of the steam turbine, means for detecting a steam pressure at the inlet side of said control valve means and for providing an output signal thereof, and means for receiving the output signals from said turbine stage pressure detecting means and said steam pressure detecting means and for providing a modified opening set signal to the controlling means whereby the opening of the control valve means is controlled on the basis of said turbine stage pressure and the steam pressure at the inlet of said control valve means.