Method for designing and operating a wind power installation, wind power installation and wind farm

Patent metadata

Field	Value
Publication number	US-11668281-B2
Application number	US-202117318392-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	May 15, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A method for designing and operating a wind power installation for generating electrical power from wind, wherein the wind power installation has an aerodynamic rotor with rotor blades of which the blade pitch angle can be adjusted, wherein the rotor blades are populated with a plurality of vortex generators between the rotor blade root and the rotor blade tip, characterized in that a radius position up to which the population with the vortex generators in the longitudinal direction of the respective rotor blade is carried out is determined depending on a sound power level to be set at a site of the wind power installation. A rotor blade of a wind power installation, to an associated wind power installation and to a wind farm.

First claim

The invention claimed is:

1. A method for operating a wind power installation for generating electrical power from wind, wherein the wind power installation has an aerodynamic rotor with a plurality of rotor blades having adjustable blade pitch angles, wherein each of the plurality of rotor blades has a rotor blade root and a rotor blade tip, the method comprising:
determining a range of radius positions in a longitudinal direction of the respective rotor blade, wherein determining the range of the radius positions depends on a sound power level to be set at a site of the wind power installation, wherein the determining the range of the radius positions comprises determining two radius positions in the longitudinal direction of the respective rotor blade, and
arranging a plurality of vortex generators on the respective rotor blade between the range of the radius positions in a longitudinal direction.

2. The method according to claim 1 , comprising adjusting the blade pitch angles of the plurality of rotor blades depending on the sound power level to be set at the site of the wind power installation.

3. The method according to claim 2 , comprising operating the wind power installation at a rated rotor speed that is reduced in comparison to a power-optimized operating mode in a sound-reduced operating mode depending on the sound power level to be set at the site of the wind power installation.

4. The method according to claim 3 , wherein determining the range of the radius positions and adjusting the blade pitch angle of the respective rotor blades minimizes flow separation and power loss.

5. The method according to claim 3 , wherein determining the range of the radius positions further depends on the reduced rated rotor speed.

6. The method according to claim 3 , wherein the blade pitch angle of the rotor blades with which the wind power installation is operated such that, during hybrid operation containing operating time periods in the power-optimized operating mode and in the sound-reduced operating mode, production losses in the power-optimized operating mode are at least compensated for by production gains in the sound-reduced operating mode over a specific time period.

7. The method according to claim 1 , wherein determining the range of the radius positions depends on the sound power level such that an increase in the blade pitch angle is minimized in the event of a reduced sound power level due to a reduction in a rated rotor speed.

8. The method according to claim 1 , comprising setting the blade pitch angles for the plurality of rotor blades depending on the range of the radius positions for of the plurality of vortex generators.

9. The method according to claim 1 , wherein determining the range of the radius positions further depends on a specific rated power at a site of the wind power installation.

10. The method according to claim 1 , comprising:
storing a plurality of blade setting characteristic curves, and
selecting one blade setting characteristic curve from amongst the stored plurality of blade setting characteristic curves depending on the range of the radius positions determined for the plurality the vortex generators and using the one blade setting characteristic curve for setting the blade pitch angle.

11. The method according to claim 1 , wherein the range of the radius positions in the longitudinal direction of the respective rotor blade further depends on a proportion of a sound-reduced operating mode at a site of the wind power installation.

12. The method according to claim 11 , further comprising determining the blade pitch angle based on the proportion of the sound-reduced operating mode at the site of the wind power installation.

13. The method according to claim 1 , wherein arranging the plurality of vortex generators on the respective rotor blade includes linearly arranging the plurality of vortex generators on the respective rotor blade.

14. A rotor blade comprising:
a body extending from a rotor blade root to a rotor blade tip and having a suction side, a pressure side, and a plurality of vortex generators, wherein the plurality of vortex generators is arranged at least on the suction side between the rotor blade root and the rotor blade tip, wherein the plurality of vortex generators is arranged in a longitudinal direction of the rotor blade between a range of radius positions, wherein the range of radius positions is in dependence on a preset site-specific sound power level, wherein the range of the radius positions is two radius positions in the longitudinal direction of the respective rotor blade.

15. The rotor blade according to claim 14 , wherein the plurality of vortex generators are arranged starting from the rotor blade root, in a direction of the rotor blade tip, up to the radius position of the rotor blade such that, during sound-reduced operation at a rated rotor speed that is reduced in comparison to power-optimized operation and with setting of a blade pitch angle of the rotor blade matched to the arrangement of the plurality of vortex generators, a flow separation reduced rated rotor speed is prevented, and thereby minimizing a power loss.

16. A wind power installation comprising:
an aerodynamic rotor with a plurality of rotor blades of which blade pitch angles are configured to be adjusted, wherein the aerodynamic rotor is configured to be operated in a respective operating mode at a respective settable rated rotor speed, and
a control system, wherein the control system is configured to operate the wind power installation using the method according to claim 1 .

17. The wind power installation according to claim 16 , wherein at least one rotor blade of the plurality of rotor blades has a rotor blade root, a rotor blade tip, a suction side, a pressure side, and a plurality of vortex generators, wherein the plurality of vortex generators is arranged at least on the suction side between the rotor blade root and the rotor blade tip, wherein the plurality of vortex generators is arranged on the respective rotor blade in a longitudinal direction in a range of radius positions in dependence on a site-specific sound power level to be set.

18. A wind farm comprising:
a plurality of wind power installations, wherein at least one wind power installation of the plurality of installations is the wind power installation according to claim 16 .

Assignees

• Wobben Properties Gmbh

Inventors

• Messing Ralf

Classifications

• F03D7/0224 Primary

  Adjusting blade pitch · CPC title

• F05B2270/327

  Rotor or generator speeds · CPC title

• F05B2270/335

  Output power or torque · CPC title

• F05B2270/101

  to control rotational speed (n) · CPC title

• F03D7/0276

  controlling rotor speed, e.g. variable speed · CPC title