Robust control design for load reduction on a liberty wind turbine

Publikationstyp
Conference Paper
Date Issued
2016-10
Sprache
English
Author(s)
Ossmann, Daniel  
Theis, Julian  orcid-logo
Flugzeug-Systemtechnik M-7  
Seiler, Peter  
TORE-URI
https://hdl.handle.net/11420/44525
Article Number
9719
Citation
ASME 2016 Dynamic Systems and Control Conference, DSCC 2016: 9719
Contribution to Conference
ASME 2016 Dynamic Systems and Control Conference, DSCC 2016  
Publisher DOI
10.1115/DSCC2016-9719
Publisher
ASME
ISBN
978-0-7918-5069-5
The increasing size of modern wind turbines also increases the structural loads on the turbine caused by effects like 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 H∞-norm optimal multivariable control design approach for an individual blade-pitch control law is presented. 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 takes into account 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 a high-fidelity nonlinear benchmark model.
Subjects
Blades
Control algorithms
Control equipment
Control systems
Design
Robust control
Stability
Stress
Turbines
Turbulence
Wind
Wind turbines
DDC Class
333.7: Natural Resources, Energy and Environment
620: Engineering