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Design Tradeoffs of Wind Turbine Preview Control

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3 Author(s)
Ozdemir, A.A. ; Dept. of Aerosp. Eng. & Mech., Univ. of Minnesota, Minneapolis, MN, USA ; Seiler, P. ; Balas, G.J.

Recent work demonstrated the benefits of preview wind measurements for turbine control. This paper investigates the basic design tradeoffs between turbine performance, preview time, and pitch actuator rate limits. A Region 3 rotor-speed tracking problem is formulated in continuous-time as an optimal control problem using a simple one-state rigid body turbine model. The exact analytical solution to this problem provides insight into the fundamental performance limits. These analytical results are compared with the performance of an H preview controller simulated on a higher fidelity, nonlinear turbine model with realistic wind sensor models. The performance versus preview time characteristics of the H controllers are in agreement with the predictions from the lower fidelity model. Thus, the analytical results obtained with the low-order model can provide design guidelines for the use of preview information in turbine control.

Published in:

Control Systems Technology, IEEE Transactions on  (Volume:21 ,  Issue: 4 )