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Load reduction on a clipper liberty wind turbine with linear parameter-varying individiual blade pitch control
Publikationstyp
Journal Article
Date Issued
2017
Sprache
English
Journal
Volume
20
Issue
10
Start Page
1771
End Page
1786
Citation
Wind energy 20 (10): 1771-1786 (2017)
Publisher DOI
Publisher
Wiley
The increasing size of modern wind turbines also increases the structural loads caused by effects such as turbulence orasymmetries in the inflowing wind field. Consequently, the use of advanced control algorithms for active load reductionhas become a relevant part of current wind turbine control systems. In this paper, an individual blade pitch control law isdesigned using multivariable linear parameter-varying control techniques. It reduces the structural loads both on the rotatingand non-rotating parts of the turbine. Classical individual blade pitch control strategies rely on single-control loops withlow bandwidth. The proposed approach makes it possible to use a higher bandwidth since it accounts for coupling at higherfrequencies. A controller is designed for the utility-scale 2.5 MW Liberty research turbine operated by the University ofMinnesota. Stability and performance are verified using the high-fidelity nonlinear simulation and baseline controllers thatwere directly obtained from the manufacturer
Subjects
load reduction
robust control
wind turbine control
DDC Class
333.7: Natural Resources, Energy and Environment
620: Engineering