Active load reduction by means of trailing edge flaps on a wind turbine blade

Ian Couchman, Damien Castaignet, Niels Kjølstad Poulsen, Thomas Buhl, Jens Jakob Wedel-Heinen, Niels Anker Olesen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


This paper presents the blade fatigue load reduction achieved with a trailing edge flap during a full scale test on a Vestas V27 wind turbine. A frequency-weighted linear model predictive control (MPC) is tuned to decrease flapwise blade root fatigue loads at the frequencies where most of the blade damage occurs, i.e. the 1P and 2P frequencies (respectively 1 and 2 events per revolution). Frequency-weighted MPC is chosen for its ability to handle constraints on the trailing edge flap deflection and to optimise its actuation in order to decrease wear and tear of the actuator. The controller was first tested in aero-servo-elastic simulations, before being implemented on a Vestas V27 wind turbine. Consistent load reduction is achieved during the full-scale test. An average of 14% flapwise blade root fatigue load reduction is measured.
Original languageEnglish
Title of host publicationProceedings of the American Control Conference 2014
Publication date2014
ISBN (Print)978-1-4799-3274-0
Publication statusPublished - 2014
Event2014 American Control Conference - Hilton Portland & Executive Tower , Portland, OR, United States
Duration: 4 Jun 20146 Jun 2014


Conference2014 American Control Conference
LocationHilton Portland & Executive Tower
Country/TerritoryUnited States
CityPortland, OR


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