Automation system and method for automated adaptation of a power plant control

Patent metadata

Field	Value
Publication number	US-9568898-B2
Application number	US-201214232280-A
Country	US
Kind code	B2
Filing date	Apr 11, 2012
Priority date	Jul 13, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An automatic adaptation of a control of a technical system, in particular of a power plant, is provided. Control circuits are created for controlling the technical system, wherein at least one control circuit and a second control circuit are coupled using a decoupling member. The decoupling member has at least one adaptable parameter. The at least one adaptable parameter of the decoupling member is automatically adapted in an online operation of the technical system to an actual, dynamic process behavior of the technical system, i.e., automatic online adaptation.

First claim

The invention claimed is:

1. A method for the automatic adaptation of a technical plant control,
in which control circuits are created for the control of the technical plant, in which at least a first control circuit and a second control circuit are decoupled using a decoupling element which has at least one adaptable parameter, and
the at least one adaptable parameter of the decoupling element is automatically adapted in an online operation of the technical plant to an actual dynamic process behavior of the technical plant, the method comprising:
measuring the actual dynamic process behavior of the technical plant,
determining a theoretical optimum process behavior of the technical plant through simulation using a model of the technical plant, and
modifying the at least one adaptable parameter of the decoupling element until the actual dynamic process behavior of the technical plant corresponds to the theoretical optimum process behavior of the technical plant in a predefinable scope or quality wherein the decoupling element comprises a reactive-current element adapted in such a way that an output signal of a noise-compensated theoretical decoupling element is reduced to the extent that a change in the first control circuit impacts on the second control circuit and the second control circuit responds accordingly.

2. The method according to claim 1 , wherein the decoupling element contains a derivative lag or delay element.

3. The method according to claim 1 , wherein the decoupling element comprises the noise-compensated theoretical decoupling element.

4. The method according to claim 1 , wherein an automatically adaptable decoupling factor is taken into account in the decoupling element as the at least one parameter automatically adapts in the online operation of the technical plant wherein the decoupling factor is a strength of the decoupling.

5. The method according to claim 1 , wherein a dead band is taken into account in the automatic online adaptation in the theoretical optimum process behavior of the technical plant.

6. The method according to claim 1 , wherein the technical plant is a power plant.

7. The method according to claim 1 , further comprising automatic decoupling of the first and the second control circuit.

8. The method according to claim 1 , wherein adaptation of the control is implemented in a commissioning of the technical plant and/or during an operation of the technical plant.

9. The method according to claim 1 , wherein the decoupling element is determined using a predefined dynamic response.

10. The method according to claim 1 , wherein the automatic online adaptation is terminated when the actual dynamic process behavior lies in a dead band that is taken into account in the theoretical optimum process behavior.

11. The method in according to claim 1 , wherein the technical plant is a steam power plant.

12. A system with a control for a technical plant, the system comprising:
a decoupling element having at least one adaptable parameter wherein the at adaptable parameter of the decoupling element is automatically adapted in an online least one operation of the technical plant to an actual dynamic process behavior of the technical plant;
control circuits of the technical plant, in which at least a first control circuit and a second control circuit are decoupled using the decoupling element;
a sensor system measuring the actual dynamic process behavior of the technical plant; and
an automation system to determine a theoretical optimum process behavior of the technical plant through simulation using a model of the technical plant, and modify the at least one adaptable parameter of the decoupling element until the actual dynamic process behavior of the technical plant corresponds to the theoretical optimum process behavior of the technical plant in a predefinable scope or quality wherein the decoupling element comprises a reactive-current element adapted in such a way that an output signal of a noise-compensated theoretical decoupling element is reduced to the extent that a change in the first control circuit impacts on the second control circuit and the second control circuit responds accordingly.

13. The system according to claim 12 , wherein the decoupling element contains a derivative lag or delay element.

14. The system according to claim 12 , wherein an automatically adaptable decoupling factor is taken into account in the decoupling element as the at least one parameter automatically adapts in the online operation of the technical plant wherein the decoupling factor is a strength of the decoupling.

15. The system according to claim 12 , wherein a dead band is taken into account in the automatic online adaptation in the theoretical optimum process behavior of the technical plant.

16. A system with a control for a technical plant, the system comprising:
a decoupling element having at least one adaptable parameter wherein the at least one adaptable parameter of the decoupling element is automatically adapted in an online operation of the technical plant to an actual dynamic process behavior of the technical plant;
control circuits of the technical plant, in which at least a first control circuit and a second control circuit are decoupled using the decoupling element; and
an automation system to determine a theoretical optimum process behavior of the technical plant through simulation using a model of the technical plant, and modify the at least one adaptable parameter of the decoupling element until an actual dynamic process behavior of the technical plant corresponds to the theoretical optimum process behavior of the technical plant in a predefinable scope or quality wherein the decoupling element comprising a derivative lag element.

17. The system according to claim 16 , wherein the automatic online adaptation is terminated when the actual dynamic process behavior lies in a dead band that is taken into account in the theoretical optimum process behavior.

18. The system according to claim 16 , wherein the technical plant is a steam power plant.

19. The system according to claim 16 , wherein the decoupling element comprises a reactive-current element adapted in such a way that an output signal of a noise-compensated theoretical decoupling element is reduced to the extent that a change in the first control circuit impacts on the second control circuit and the second control circuit responds accordingly.

Assignees

• Groganz Julian
• Rupp Joachim
• Wendelberger Klaus
• Siemens Ag

Inventors

• Groganz Julian
• Rupp Joachim
• Wendelberger Klaus

Classifications

• G05B13/04 Primary

  involving the use of models or simulators · CPC title

• G05B13/042 Primary

  in which a parameter or coefficient is automatically adjusted to optimise the performance · CPC title