Modelling of Wind Turbine System by Means of Permanent Magnet Synchronous Generator

This paper presents a control scheme for a direct-drive permanent magnet synchronous generator wind turbine system with the objectives to get the optimal power from the wind and make sure a maximum efficiency for this system. Furthermore, in order to remove the electrical speed sensor mounted on the rotor shaft of the PMSG (Permanent magnet synchronous generator) to decrease the system hardware complexity and improve the reliability of the system, a sliding mode observer based PM rotor position and speed sensor less control algorithm is presented here.The most favorable tip speed ratio based maximum power point tracking control is utilized to make sure the maximum power capture for the system. The field oriented control algorithm is applied to control the speed of the PMSG with the orientation of the wind speed. In the grid-side converter control, voltage oriented control algorithm is applied to control the active and reactive power injected into the power grid.