Direct Controlled Matrix Converters in Variable Speed Wind Energy Generation Systems

This paper presents a variable speed wind energy generation system with a doubly-fed induction generator (DFIG), using a direct controlled matrix converter in the rotor circuit. The main aim is to extract the maximum energy from the wind (Maximum Point Power Tracking - MPPT). In order to achieve a decoupled control between the torque and the rotor excitation current, the induction machine equations are obtained using the Stator Flux Oriented Control (SFOC) approach. The matrix converter will be used to control the rotor currents, guaranteeing the necessary torque, to extract the maximum energy from the wind (MPPT). The obtained results show that the proposed variable speed wind energy generation system has the expected performance, guaranteeing the MPPT.