The operation of large wind turbines requires an efficient control system in order to have a stable and optimal behaviour for all operational states. The control system consists, in general, of several control loops with multiple controllers, which have to be managed by a supervisor depending on the current operational state of the machine. The present chapter describes the implementation of a supervisory control system by using a hybrid automaton, whose function is to switch control loops and controllers according to the current operational state of the machine.
