Wind turbine preview control has recently attracted attention in the literature. This is due to significant load attenuation and power optimization benefits that can be obtained by incorporating wind preview measurements into the turbine control laws. However, the trade-offs between performance, preview time, and actuation rate limits are not well understood. This paper investigates the fundamental limits of performance for the Region 3 rotor speed regulation problem. An optimal control problem is formulated in discrete-time using linearized turbine models subject to pitch actuator rate constraints. Linear programming is used to numerically compute the optimal control input for a given wind profile. The solution of the linear program provides a bound on the performance achievable by any controller. These results are validated on H ∞ controllers designed to incorporate various amounts of preview wind information. H∞ controllers are simulated on a higher-fidelity, nonlinear turbine model. The linear programming analysis accurately predicts the performance versus preview time characteristics of these H∞ controllers.
|Original language||English (US)|
|State||Published - Dec 1 2012|
|Event||50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States|
Duration: Jan 9 2012 → Jan 12 2012
|Other||50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition|
|Period||1/9/12 → 1/12/12|