Method and control device for controlling an electrical grid

Patent metadata

Field	Value
Publication number	US-10333347-B2
Application number	US-201615265219-A
Country	US
Kind code	B2
Filing date	Sep 14, 2016
Priority date	Oct 7, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

An electrical grid, using physical operating data of the electrical grid a current operating status of the electrical grid is determined by way of a network model of the electrical grid is provided. A first grid component is controlled as a function of a control signal by a regulator with a grid-component-internal control circuit which is adjustable via control parameters. A first component model of the first grid component is imported to determine a dynamic reaction of the first grid component to the control signal depending on the control parameters.

First claim

The invention claimed is:

1. A method for controlling an electrical grid with grid components, wherein
a) recording physical operating data of the grid components by sensors,
b) determining by way of the recorded physical operating data, a current operating status of the electrical grid by way of a network model of the electrical grid which spans the grid components,
c) controlling a first grid component as a function of a control signal by a regulator with a grid-component-internal control circuit which is adjustable via control parameters,
d) importing a first component model of the first grid component to determine a dynamic reaction of the first grid component to the control signal depending on the control parameters,
e) varying as part of an optimization procedure the control parameters, wherein the first component model as well as the network model, depending on the current operating status and the varied control parameters the dynamic reaction is determined and the control parameters are determined in such a way that the dynamic reaction fulfills a predetermined criterion, and
f) adjusting the regulator by the thus determined control parameters.

2. The method as claimed in claim 1 , wherein the control parameters are determined in such a way that the dynamic reaction of the first grid component stabilizes the electrical grid.

3. The method as claimed in claim 1 , wherein a second grid component of the electrical grid is regulated as a function of a second control signal,
that a second component model of the second grid component is imported to determine a second dynamic reaction of the second grid component to the second control signal and
that the dynamic reaction in step e) is determined by the second component model.

4. The method as claimed in claim 1 , wherein a plurality of dynamic reactions of a grid component to control signals is recorded by sensors, and
that a component model of the grid component is adjusted in such a way that it essentially reproduces the plurality of dynamic reactions.

5. The method as claimed in claim 1 , wherein a component model comprises structure data relating to a grid-component-internal structure of a grid component,
that a black box component model of the grid component is imported for determining output signals of the grid component as a function of input signals, and
the component model is adjusted in such a way that it essentially reproduces output signals determined by the black box component model taking into consideration the structure data.

6. The method as claimed in claim 5 , wherein the network model includes the black box component model.

7. The method as claimed in claim 1 , wherein from the first component model and/or the network model a first component model linearized around the current operating status and/or a network model linearized around the current operating status is generated.

8. The method as claimed in claim 7 , wherein the linearized first component model and/or the linearized network model dynamic oscillation modes of the electrical grid can be determined, and that the control parameters can be determined in such a way that the regulator counteracts the determined oscillation modes.

9. The method as claimed in claim 7 , wherein process stage the linearized first component model is used as the first component model and/or the linearized network model is used as the network model for determining the control parameters,
that a detailed simulation model, as a function of the current operating status and the determined control parameters a detailed dynamic reaction of the first network component is determined, and
that the regulator is adjusted by the determined control parameters if the detailed dynamic reaction fulfills the predetermined criterion.

10. The method as claimed in claim 9 , wherein as a detailed simulation model, the first component model, the second component model, the network model, a non-linear simulation model and/or a black box simulation model is used.

11. A control device for controlling an electrical grid with several grid components, set up for implementing a method according to claim 1 .

12. A non-transitory computer-readable storage medium comprising a computer program product for controlling an electrical grid as claimed in claim 1 .

Assignees

• Siemens Ag

Inventors

• Münz Ulrich

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J3/0014 Primary

  for preventing or reducing power oscillations in networks · CPC title

• H02J3/12

  Arrangements for adjusting voltage in AC networks by changing a characteristic of the network load · CPC title

• H02J3/36

  Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links · CPC title

• Y02E60/60

  Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD] · CPC title