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US 10,267,512 B2Granted
Multi-variable state closed-loop control for a steam generator of a thermal power plant
AssigneeSiemens Aktiengesellschaft
InventorsAnnette Barenbrügge, Fabian Bargiel, Lutz Hanel, Bernhard Meerbeck, Michael Treuer, Klaus Wendelberger
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Abstract
A device for closed-loop control of a plurality of state variables of a steam generator of a thermal power plant is provided. In order to achieve stable and exact closed-loop control of the plurality of state variables, a multi-variable control/controller controls the plurality of state variables and uses a linear quadratic controller for this multi-variable control/controller.
Claims10
A method for closed-loop control of a plurality of state variables in a steam generator of a thermal power plant, comprising:
- providing a spatially discretized steam generator model of the steam generator of the thermal power plant, wherein the steam generator has at least one evaporator and a superheater, wherein the steam generator has a plurality of discretized volume elements with a constant volume, and wherein the spatially discretized steam generator model has at least one of energy and mass balance set by way of the plurality of discretized volume elements;
- simultaneously controlling the plurality of state variables using a multi-variable state controller, the multi-variable state controller being a linear quadratic controller, wherein the multi-variable state controller uses the spatially discretized steam generator model.
Dependencies are inferred from the claim text.