Modeling and robust control of autonomous hybrid wind-diesel systems

Author.This thesis relies on modeling, control and dynamic analysis of a wind-diesel plant. The objectives is to reduce the effect of wind variations and consumer load disturbances on the power quality, represented by a constant voltage and constant frequency, of the system. The wind-diesel system is characterized by its continuously changing operating point due to the natural fluctuation of available power from the renewable wind energy source and to the non linearities that exist in the wind turbine model and in the saturation of the electric generators. To overcome these problems, conventional robust controllers and fuzzy controllers have been investigated. In this study, the Norwegian wind-diesel prototype was adopted for modeling and simulation. The system model consists of mechanical components represented by the diesel engine and the wind turbine and electrical components represented by the synchronous generator, the induction generator and the load impedance. The design of one conventional non linear robust controller (FLPI) was presented and applied to the wind-diesel plant