Optimized torque control of wind turbines with doubly fed induction generator

Wind turbines represent elastically coupled multi-mass systems. Dynamic load changes caused by a gust of wind lead to peaks in the shaft torsion torque and result into high stress for the system. This paper presents an opportunity to integrate a stress minimizing control strategy, which was presented in [7], on wind turbines with doubly fed induction generator (DFIG). To avoid extensive measurements during the operation of a wind turbine simple observer structures are used. Observer and control were implemented at a test stand.