An Enhanced Performance of Stationary Reference Frame Controlled Three-Phase Vienna Rectifier Under Grid Voltage Disturbances

This paper introduces a novel control strategy for enhancing the performance of the three-phase Vienna rectifier when faced with grid voltage disturbances. Unlike conventional methods, which typically employ three control loops for current regulation, capacitor voltage balance, and output voltage control, the proposed approach integrates a fundamental frequency positive sequence (FFPS) extractor into the output voltage control loop. By incorporating Multiple Delayed Signal Cancellation (MDSC) filters as FFPS extractors, the system can isolate the FFPS component of the reference three-phase grid currents. Additionally, the design of the output voltage controller, employing MDSC filters, is optimized symmetrically. Real-time simulations with case studies validate the effectiveness of this control method in mitigating current total harmonic distortion (THD), reducing capacitor ripple voltages, and minimizing output voltage ripple, particularly in the presence of grid voltage disturbances.