ABSTRACT
The continuous increase of the size of wind turbines, due to the demand of higher power production installations, has led to new challenges in the design of the turbines. Moreover, new control strategies are being developed. Today’s strategies trend towards being multivariable and multi-objective in order to fulfill the numerous control design specifications. To be more precise, one important specification is to mitigate loads in the turbine components to increase their life time. This can be done through the components mechanical design, the introduction of new materials or by improving the control itself. In addition to this, the behaviour of a wind turbine is non-linear, which implies that the designed control performance has to be robust.
