Method and device for controlling the temperature of steam for a steam power plant
AssigneeSiemens Aktiengesellschaft
InventorsBernhard Meerbeck, Joachim Rupp, Michael Treuer, Tobias Weissbach, Klaus Wendelberger
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Abstract
A state controller, in order to output a desired steam temperature as a controlled variable, feeds back several steam states in a superheater for superheating steam using a monitor, which calculates the steam states, and the desired steam temperature is forwarded to a further controller for controlling the temperature. In order to achieve a stable and accurate control of the steam temperature, it is proposed that the state controller be a linear quadratic controller.
Claims21
-15. (canceled)
A method for controlling the temperature of steam for a steam power plant, comprising:
- feeding back a plurality of steam states in a superheater by a state controller for superheating the steam using an observer;
- calculating the plurality of steam states by the observer;
- feeding back the plurality of steam states by the observer for an output of a steam target temperature as a manipulated variable;
- and
- forwarding the steam target temperature to a further controller for controlling the temperature,
- wherein the state controller is a linear quadratic regulator.
A device for controlling the temperature of steam for a steam power plant, comprising:
- a state controller for outputting a steam target temperature as a manipulated variable by feeding back a plurality of steam states of a superheater for superheating the steam;
- an observer which calculates the plurality of steam states;
- and
- a further controller for controlling a temperature on the basis of the steam target temperature,
- wherein the state controller is a linear quadratic controller.
Dependencies are inferred from the claim text.