Wind turbine control: Advances for load mitigations and hydraulic drivetrains

In the last decades, tremendous efforts have been put in advancements of wind turbine technology by scientific research and industrial developments. One of the focal areas has been the upscaling of turbines to increase power capacity. However, by enlarging turbine sizes, the square-cube law dictates rising costs per unit of power capacity. To break this trend of increased expenses, more advanced control techniques are key in facilitating load reductions and system level advances. The synthesis of novel controller designs, and advancements of existing strategies, are in this thesis effectuated by leveraging well-established control theory. This method resulted in analysis tools, that gave rise to practical applicable implementations, of which some are evaluated on real-world setups. The employed approach has thereby shown to stimulate further advancements of wind turbine technology...