Open AccessLoad reduction on a clipper liberty wind turbine with linear parameter‐varying individual blade pitch control
Author(s) -
Ossmann Daniel,
Theis Julian,
Seiler Peter
Publication year - 2017
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.2121
Subject(s) - clipper (electronics) , turbine , control theory (sociology) , pitch control , blade pitch , engineering , bandwidth (computing) , nonlinear system , wind power , controller (irrigation) , turbine blade , computer science , control (management) , aerospace engineering , mechanical engineering , physics , electrical engineering , telecommunications , artificial intelligence , agronomy , quantum mechanics , biology
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. Copyright © 2017 John Wiley & Sons, Ltd.