Abstract
Turbulence generated in the stable atmospheric boundary layer can contain vorticity that adversely affects wind turbine blade fatigue life. We investigated advanced control algorithms that mitigate the vortex/wind turbine interaction. State space control designs can meet multiple control objectives such as maintaining power regulation while mitigating blade flap bending moment amplitude. Weimplemented disturbance accommodating control (DAC) methods in a structural dynamics code to mitigate blade loads and maintain constant power production in above-rated wind speeds. As a best-case scenario, we implemented a disturbance model that incorporated very detailed vortex characteristics in full-state feedback. This reduced equivalent fatigue load as much as 30% compared to a standardproportional-integral (PI) controller. A realizable DAC controller that incorporates only the vertical shear component of the vortex reduced loads by 9% compared to a PI controller, and as much as 29% when the vortex was superimposed over normal turbulence.
Original language | American English |
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Number of pages | 15 |
State | Published - 2004 |
Event | Science of Making Torque from Wind 2004 Special Topic Conference - Delft, The Netherlands Duration: 19 Apr 2004 → 21 Apr 2004 |
Conference
Conference | Science of Making Torque from Wind 2004 Special Topic Conference |
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City | Delft, The Netherlands |
Period | 19/04/04 → 21/04/04 |
NREL Publication Number
- NREL/CP-500-35966
Keywords
- wind energy
- wind turbine
- wind turbine control system