Maximum Power Point Tracking of Variable Speed Wind Generation System.

In this paper maximum power point tracking of wind turbine connected to induction generator are studied. The stator currents of the induction generator are optimally controlled using indirect orientation control (IFOC) according to the generator speed in order to maximize the generated power from the wind turbine. The induction generator is controlled by the maximum power point tracking (MPPT) below the base speed and the maximum energy can be captured from the wind turbine. In this method, generator side converter controls the maximum excitation (air gap flux) by machine's d-axis current and controls generator torque by machine's q-axis current. Induction generator speed is controlled by tip speed ratio (TSR) upon the wind speed variations in order to generate the maximum output power. Grid side converter regulates the DC link voltage and injective active power by d-axis current and regulates the injective reactive power by q-axis current using P-Q control method. Simulation results depct that the proposed method operates correctly. [ABSTRACT FROM AUTHOR]