Wind turbine generator operating in smart grids: Diagnosis for more reliability

Design of modern wind farms, and more specifically for smart grids, must take into account two crucial aspects: efficient control strategies and reliable monitoring and diagnosis systems. Wind turbine generators based on Wound Rotor Induction Machine (WRIM) is actually the preferred technology considering the above purposes. With the association of a back-to back converter on the rotor side a Stator-Flux-Oriented-Control (SFOC) system can be used to obtain e decoupled control of the active and reactive power on the stator side. This kind of control system is widely used for its efficiency and because of the lower rating of the power converter connected to the rotor side. Recently, by using the converter modulating voltages, efficient techniques have been developed for steady-state and transient operating conditions. Also a virtual platform structure to pass from wired systems to wireless systems with the possibility of remote monitoring has been presented.