Full-scale test of trailing edge flaps on a Vestas V27 wind turbine: active load reduction and system identification

Damien Castaignet, Thanasis K. Barlas, Thomas Buhl, Niels Kjølstad Poulsen, Jens Jakob Wedel-Heinen, Niels A. Olesen, Christian Bak, Taeseong Kim

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A full-scale test was performed on a Vestas V27 wind turbine equipped with one active 70 cm long trailing edge flap on one of its 13 m long blades. Active load reduction could be observed in spite of the limited spanwise coverage of the single active trailing edge flap. A frequency-weighted model predictive control was tested successfully on this demonstrator turbine. An average flapwise blade root load reduction of 14% was achieved during a 38 minute test, and a reduction of 20% of the amplitude of the 1P loads was measured. A system identification test was also performed, and an identified linear model, from trailing edge flap angle to flapwise blade root moment, was derived and compared with the linear analytical model used in the model predictive control design model. Flex5 simulations run with the same model predictive control showed a good correlation between the simulations and the measurements in terms of flapwise blade root moment spectral densities, in spite of significant differences between the identified linear model and the model predictive control design model.
Original languageEnglish
JournalWind Energy
Volume17
Issue number4
Pages (from-to)549–564
ISSN1095-4244
DOIs
Publication statusPublished - 2014

Keywords

  • Trailing edge flaps
  • Active load reduction
  • System identification
  • Full-scale test

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