Sensorless Optimal Power Control of Doubly Fed Induction Wind Generator Based on Extended Kalman Filter Full text in English

摘要

In this paper present a sensorless optimal power point tracking control of doubly-fed induction generators (DFIG) in Wind Energy Conversion System (WECS) without speed sensors based of a application of the extended Kalman filter (EKF) for estimation of rotor speed and without wind speed measurements based of the characteristic curve of the wind turbine aerofoil, the Doubly Fed Induction Generator (DFIG) connected to the grid through back-to-back converters in the rotor circuit. Rotor-side converter adopts the stator flux oriented vector control (technique) and the Grid-side converter adopts grid voltage oriented control scheme for achieving the DC link voltage constant, unity power factor of grid-side and bi-direction power flow between the rotor and the grid.The simulation results in MATLAB/Simulink platform verify the good static and dynamic performance of this sensorless power control for DFIG in variable speed wind turbines.