Control device and method comprising a steam turbine

The invention relates to a regulating device comprising a steam turbine with a power value (12) and at least one steam control valve (2) in front of a high-pressure turbine portion (3), a steam turbine control system (100) comprising a power controller (40) with an opening controller or pressure regulator (50) is provided, wherein the aperture controller or pressure regulator (50) acts regulating at least the position of the steam control valve (2), and wherein the steam turbine control system (100) is cascaded, wherein the power controller (40) is designed as a master controller and at least the subsequent opening controller or pressure regulator (50) as a sequence controller, and wherein the power controller (40) calculates an opening or pressure setpoint as a master controller of a power value (12) and a predetermined power setpoint value (13), and wherein the aperture controller or pressure regulator (50) sets as a sequence controller, at least the position of the steam control valve (2), on the basis of this pressure setpoint and a pressure feedback obtained (14) or an opening command value and a Offnungsistwertes determined. The invention also relates to a method.