AWC validation methodology
report
This report describes a validation methodology for active wake control (AWC) by wake
redirection, a wind farm operation strategy aiming to increase the overall power production of the wind farm. The power gain is achieved by reducing wake effects through
intentional yaw misalignment of the rotors of upstream wind turbines to change the
path of the wakes and avoid impinging on downstream turbines.
The AWC validation methodology, described here, complies with the agreed requirements, and details on the following aspects:
• determination of reference wind velocity using nacelle anemometry
• determination of reference wind direction using nacelle anemometry
• data filtering and data binning
• dealing with turbine unavailability, curtailment and power­boosting
• calculation of power ratio per bin and overall, including relevant statistics
• impact of the choice of the toggle period on the accuracy of the results
• uncertainty assessment
A number of examples using real life data from several wind farms is used to illustrate
the most important components of the AWC validation methodology. Still, at the point
of preparing this document, no data is yet available from actual full­scale field tests
with AWC by yaw redirection, and therefore the method could not yet be fully tested.
This is planned to be done in the near future
redirection, a wind farm operation strategy aiming to increase the overall power production of the wind farm. The power gain is achieved by reducing wake effects through
intentional yaw misalignment of the rotors of upstream wind turbines to change the
path of the wakes and avoid impinging on downstream turbines.
The AWC validation methodology, described here, complies with the agreed requirements, and details on the following aspects:
• determination of reference wind velocity using nacelle anemometry
• determination of reference wind direction using nacelle anemometry
• data filtering and data binning
• dealing with turbine unavailability, curtailment and power­boosting
• calculation of power ratio per bin and overall, including relevant statistics
• impact of the choice of the toggle period on the accuracy of the results
• uncertainty assessment
A number of examples using real life data from several wind farms is used to illustrate
the most important components of the AWC validation methodology. Still, at the point
of preparing this document, no data is yet available from actual full­scale field tests
with AWC by yaw redirection, and therefore the method could not yet be fully tested.
This is planned to be done in the near future
Topics
TNO Identifier
880060
Publisher
TNO
Collation
58 p.
Place of publication
Petten