In this article, a theory of adaptive disturbance rejection control is used to design an individual blade pitch controller to reduce the loading in a utility-scale wind turbine. The goal of the adaptive disturbance rejection control is to regulate the blade pitch angle individually to reduce the asymmetrical loading in blade due to vertical wind shear and also to reject the unnecessary disturbance introduced by the wind turbulence. The applicability of the theory is illustrated by implementing the controller in the National Renewable Energy Laboratory’s 5-MW nonlinear, high-fidelity wind turbine model and simulating it in MATLAB/Simulink.
BalasMJLeeYKendallL (1998) Disturbance tracking control theory with application to horizontal axis wind turbines. In: Proceedings of 17th ASME wind energy symposium, Reno, NV, 12–15 January.
2.
BossanyiEA (2003) Individual blade pitch control for load reduction. Wind Energy6: 119–128.
3.
FrostSABalasMJWrightA (2009) Adaptive control of a utility-scale wind turbine operating in region III. In: Proceedings of 47th AIAA aerospace science meeting including the new horizons forum and aerospace exposition, Orlando, FL, 5–8 January.
4.
HandMM (2003) Mitigation of wind turbine/vortex interaction using disturbance accommodation control. Technical report, National Renewable Energy Laboratory, Boulder, CO, December.
5.
JohnsonCD (1976) Theory of disturbance accommodating controllers: control and dynamic systems. In: LeondesCT (ed.) Advances in Theory and Applications. New York: Academic Press, pp. 387–489.
6.
JohnsonKEFingershLJ (2007) Adaptive pitch control of variable-speed wind turbines. In: Proceedings of 45th AIAA aerospace science meeting and exhibit, Reno, NV, 10 January.
7.
JonkmanJMBuhlML (2005) FAST user’s guide, Technical Report NREL/EL-500-38320. Available at: https://nwtc.nrel.gov/FAST
8.
JonkmanJMButterfieldSMusialW. (2009) Definition of a 5-MW reference wind turbine for offshore system development. Technical Report NREL/TP-500-38060. Available at: http://www.nrel.gov/docs/fy09osti/38060.pdf
9.
MagarKTBalasMJFengY. (2013) Adaptive pitch control for speed regulation of floating offshore wind turbine. In: Proceedings of 51st AIAA aerospace science meeting including the new horizons forum and aerospace exposition, Grapevine,TX, 7–10 January 2013.
SelvamKKanevSvan WingerdenJW. (2009) Feedback-feedforward individual pitch control for wind turbine load reduction. International Journal of Robust and Nonlinear Control19: 72–91.
12.
StolKZhaoWWrightA (2006) Individual blade pitch control for the Controls Advanced Research Turbine (CART). In: Proceedings of 44th AIAA Aerospace Science Meeting and Exhibit, Reno, NV, 12 January.
