Method and apparatus for controlling a steam turbine of a power station unit

A method of controlling a steam turbine of a power station unit that includes steam turbine and a steam generator, with the output signal of a turbine controller of a control system acting on an adjusting mechanism of a turbine inlet valve arrangement, said method according the steps of:

• adding to said output signal of said turbine controller, at a summation point, a further signal as to valve opening rated value;
• computing said further signal from the load setpoint of said turbine controller according to the following division relationship, which governs said steam turbine:
• electrical ouput/steam pressure=inlet valve opening;
• and
• supplying said further signal to said summation point at a value based on said computed magnitude and a magnitude derived by multiplying said computed magnitude by a factor which deviates from unity;
• said computing being carried out for division of electrical output rated value and pressure rated value relatively into the electrical output rated value for controlling the valve arrangement not only initially but rather during entire output operation with which magnitude of valve adjusting value is decoupled from dynamics of the entire operation including actual output and with which advantageously via course of rated values via said computing there is anticipation of adjusting magnitude changes of said turbine controller that is relieved thereof and then must only compensate for disturbing influences of the control system.