Load reduction on a clipper liberty wind turbine with linear parameter-varying individual blade pitch control

Daniel Ossmann, Julian Theis, Peter J Seiler Jr

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The increasing size of modern wind turbines also increases the structural loads caused by effects such as turbulence or asymmetries in the inflowing wind field. Consequently, the use of advanced control algorithms for active load reduction has become a relevant part of current wind turbine control systems. In this paper, an individual blade pitch control law is designed using multivariable linear parameter-varying control techniques. It reduces the structural loads both on the rotating and non-rotating parts of the turbine. Classical individual blade pitch control strategies rely on single-control loops with low bandwidth. The proposed approach makes it possible to use a higher bandwidth since it accounts for coupling at higher frequencies. A controller is designed for the utility-scale 2.5 MW Liberty research turbine operated by the University of Minnesota. Stability and performance are verified using the high-fidelity nonlinear simulation and baseline controllers that were directly obtained from the manufacturer.

Original languageEnglish (US)
Pages (from-to)1771-1786
Number of pages16
JournalWind Energy
Volume20
Issue number10
DOIs
StatePublished - Oct 1 2017

Fingerprint

Wind turbines
Turbomachine blades
Structural loads
Turbines
Bandwidth
Controllers
Turbulence
Control systems

Keywords

  • load reduction
  • robust control
  • wind turbine control

Cite this

Load reduction on a clipper liberty wind turbine with linear parameter-varying individual blade pitch control. / Ossmann, Daniel; Theis, Julian; Seiler Jr, Peter J.

In: Wind Energy, Vol. 20, No. 10, 01.10.2017, p. 1771-1786.

Research output: Contribution to journalArticle

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