|Institution:||Högskolan i Halmstad|
|Keywords:||Robust Control; Wind Turbine; Computer Systems Technology; Datorsystemteknik; Technology; teknik|
|Full text PDF:||http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1136|
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.