Wind farm controller, controlled units and method for transmitting control variables from the wind farm controller to the controlled units

Patent metadata

Field	Value
Publication number	US-11085418-B2
Application number	US-201716329127-A
Country	US
Kind code	B2
Filing date	Aug 29, 2017
Priority date	Sep 5, 2016
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

Provided is a method for transmitting controlling control variables from a windfarm controller to units including at least one wind power installation or at least one energy store. The method include determining first and second controlling control variable components by the windfarm controller, outputting the first controlling control variable component in a first data packet, outputting the second controlling control variable component in a second data packet, receiving the first and second data packets by a first unit, and determining a controlling control variable from the first and second controlling control variable components. The first data packet has a receiver address which is assigned to the first unit and to at least one further unit, and the second data packet has a receiver address which is assigned to at least the first unit. Provided is a windfarm controller, a wind power installation and a windfarm configured to perform the method.

First claim

The invention claimed is:

1. A method for transmitting control variables from a controller to wind power installations or energy stores, comprising:
determining a first control variable component;
determining, by the controller, a second control variable component;
outputting the first control variable component in a first data packet;
outputting the second control variable component in a second data packet;
receiving, by at least one wind power installation or energy store, the first data packet including the first control variable component;
receiving, by the at least one wind power installation or energy store, the second data packet including the second control variable component; and
determining, by the at least one wind power installation or energy store, a control variable from the first control variable component and the second control variable component,
wherein the first data packet has a first receiver address that is assigned to the at least one wind power installation or energy store and to at least one further wind power installation or energy store, and the second data packet has a second receiver address that is assigned to the at least one wind power installation or energy store, and
wherein first data packets having respective first controlling control variable components are sent more frequently than second data packets having respective second controlling control variable components.

2. The method as claimed in claim 1 , comprising:
storing the first control variable component and the second control variable component in memory of the at least one wind power installation or energy store;
receiving a first further data packet with a further first control variable component;
after receiving the first further data packet with the further first control variable component, determining the control variable from the further first control variable component and the stored second control variable component;
receiving a second further data packet with a further second control variable component;
after receiving the second further data packet with the further second control variable component, determining the control variable from the stored first control variable component and the further second control variable component; and
storing the further first control variable component or the further second control variable component in the memory.

3. The method as claimed in claim 1 , comprising:
transmitting the first data packet and the second data packet cyclically or in an event-based manner.

4. The method as claimed in claim 1 , wherein:
the first control variable component corresponds to a first absolute or percentage value and the second control variable component corresponds to a second absolute or percentage value and the method comprises: determining the control variable by adding the first control variable component and the second control variable component; or
the first control variable component corresponds to an absolute or percentage value and the second control variable component corresponds to a factor and the method comprises: determining the control variable by multiplying the first control variable component by the second control variable component.

5. The method as claimed in claim 1 , wherein the control variable has values between a minimum value and a maximum value and the first control variable component has a value between 0 and 100% of a difference between the minimum value and maximum value and the second control variable component has a value between−100% and 100% of the difference between the minimum value and maximum value.

6. The method as claimed in claim 1 , comprising:
determining the first control variable component based on global parameters for a plurality of or all of the wind power installations or energy stores of a windfarm; and
determining the second control variable component based on specific parameters to the at least one wind power installation or energy store.

7. The method as claimed in claim 1 , comprising:
determining, by the controller, the first control variable component depending on a reference variable for the controller that is specified by a windfarm operator or network operator.

8. The method as claimed in claim 1 , wherein the second control variable component is defined for a specific at least one wind power installation or energy store depending on a reference variable which is defined with parameters specific to the specific at least one wind power installation or energy store.

9. The method as claimed in claim 1 , wherein the control variable is a power control variable including an active power control variable, a reactive power control variable, a voltage control variable or a frequency control variable.

10. A controller for a windfarm, comprising:
at least one data output configured to connect, via a data connection, to wind power installations or energy stores, and to transmit a first control variable component in a first data packet and a second control variable component in a second data packet, wherein the controller is configured to:
determine the first control variable component and the second control variable component, and wherein the first data packet has a first receiver address that is assigned to at least one wind power installation or energy store and to at least one further wind power installation or energy store, and the second data packet has a second receiver address that is assigned to the at least one wind power installation or energy store,
wherein first data packets having respective first controlling control variable components are sent more frequently than second data packets having respective second controlling control variable components.

11. The controller as claimed in claim 10 , comprising:
at least one data input configured to receive a reference variable from a network operator or a windfarm operator.

12. The controller as claimed in claim 10 , comprising:
a memory configured to store unit-specific parameters.

13. The controller as claimed in claim 10 , comprising:
at least one data input configured to connect at least one sensor that is an environmental sensor for determining at least one of wind direction or wind speed.

14. A wind power installation for a windfarm, comprising:
at least one data input configured to receive a first data packet including a first control variable component and a second data packet including a second control variable component; and
a computer configured to determine a control variable from the first control variable component and the second control variable component, wherein the first data packet has a first receiver address that is assigned to the wind power installation and to at least one further wind power installation, and the second data packet has a second receiver address that is assigned to the wind power installation,
wherein first data packets having respective first controlling control variable components are sent more frequently than second data packets having respective second controlling control variable components.

15. The wind power installation as claimed in claim 14 , wherein the computer is configured to add or multiply the first control variable component and the second control variable component, and the wind power installation comprises:
memory configured to store the first control variable component and the second control variable component.

16. The windfarm as claimed in claim 14 , comprising:
a windfarm controller; and
a plurality of wind power installations including the wind power installation.

Assignees

• Wobben Properties Gmbh

Inventors

• Giertz Helge

Classifications

• G05B2219/25208

  Control message, address and command portion · CPC title

• G05B2219/25211

  Broadcast mode, length message, command, address of originator and destination · CPC title

• G05B2219/25218

  Broadcast mode, originator, destinator address, command, check data · CPC title

• G05B19/106

  for selecting a program, variable or parameter · CPC title

• F03D7/048 Primary

  controlling wind farms · CPC title