Abstract
This paper studies the active rotor load controller design for a large wind turbine via individual pitch control (IPC). A multivariable IPC is designed to reject the periodic load disturbances, in an optimal manner, by penalizing the control effort according to the pitch actuator constraints. Frequency response analysis of the well-known multi-blade coordinate (MBC) transformation describes how the rotational speed variations influence the flexible modes of the blades. Therefore, a multivariable plant is constructed in the frequency-domain, compatible with applying the disturbance rejection control approaches. Then, a mixed sensitivity H∞ optimization problem is formulated based on the obtained MIMO model. The performance of the synthesized controller is analyzed and compared with the PI-based IPC. Finally, the dynamic load mitigation of the developed controller is studied through the fatigue load analysis with a high-fidelity aeroelastic simulator. Results show a significant amount of load alleviation in return for an even lower level of the pitch activity, with respect to the PI-based IPC.
Original language | English |
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Title of host publication | Proceedings of the 2016 American Control Conference (ACC 2016) |
Editors | George Chiu, Katie Johnson, Danny Abramovitch |
Place of Publication | Piscataway, NJ, USA |
Publisher | IEEE |
Pages | 3163-3169 |
ISBN (Print) | 978-1-4673-8682-1 |
DOIs | |
Publication status | Published - 2016 |
Event | American Control Conference (ACC), 2016 - Boston, MA, United States Duration: 6 Jul 2016 → 8 Jul 2016 |
Conference
Conference | American Control Conference (ACC), 2016 |
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Abbreviated title | ACC 2016 |
Country/Territory | United States |
City | Boston, MA |
Period | 6/07/16 → 8/07/16 |
Keywords
- Blades
- Aerodynamics
- Rotors
- Wind turbines
- Actuators
- MIMO
- Mathematical model