Robust Control Solution of a Wind Turbine

University essay from Högskolan i Halmstad/Högskolan i Halmstad; Högskolan i Halmstad/Högskolan i Halmstad

Abstract:

Power generation using wind turbines is a highly researched control field.

Many control designs have been proposed based on continuous-time models

like PI-control, or state observers with state feedback but without special

regard to robustness to model uncertainties. The aim of this thesis was to

design a robust digital controller for a wind turbine.

The design was based on a discrete-time model in the polynomial framework

that was derived from a continuous-time state-space model based on

data from a real plant. A digital controller was then designed by interactive

pole placement to satisfy bounds on sensitivity functions.

As a result the controller eliminates steady state errors after a step

response, gives sufficient damping by using dynamical feedback, tolerates

changes in the dynamics to account for non linear effects, and avoids feedback

of high frequency un modeled dynamics.

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