Reducing Current and Torque Ripples in DVC Control of DFIG Operation at Constant Switching Frequency for Wind Generation Application

This research work presents a new seven-level space vector pulse width modulation (SVPWM) based on fuzzy logic (FL) of the doubly fed induction generator (DFIG) integrated in a wind turbine system is presented. The classical direct vector control (DVC) using conventional proportional-integral (PI) controller presents considerable active and reactive power ripples. In order to ensure a robust DVC control scheme for the DFIG-rotor side converter and reduces reactive power ripple, harmonic distortion of rotor current, electromagnetic torque ripples and active power ripples, a DVC based on seven-level fuzzy space vector modulation (FSVPWM) technique is used in this article. Simulation results show the efficiency of the proposed method of control especially on the quality of the provided power comparatively to a DVC with classical SVPWM strategy of seven-level inverter.