A combined controller design of power system stabilizer and wind turbine drive-train damping filter

A coordinated power system stabiliser (PSS) design for wind turbine equipped with doubly-fed induction generator (DFIG) is presented in this paper. It is shown that the proposed control scheme enables the optimal performance for both the wind turbine structural loads damping and the power system damping. The interaction between wind turbine controller and PSS is studied by simulation. A holistic model including both the wind turbine and the electric network dynamics is employed for the assessment of controller performance. The influence of PSS control on wind turbine drive-train and tower are demonstrated. A generic network model is used to test the contribution that wind farm can make to the power system damping. It is shown that wind turbine is capable of providing similar damping response as synchronous generator do with acceptable increase of structural loads.