INTRODUCING AN EFFICIENT AND HIGH-PERFORMANCE CONTROL STRATEGY BASED ON A NOVEL VECTOR CLAMPING CLASSIFICATION TECHNIQUE FOR THREEPHASE BOOST RECTIFIERS.

To date three-phase boost rectifiers, due to their high efficiency, good current quality and low EMI emissions are widely used in industry as Power Factor Correction (PFC) converters. Performance criteria of these converters improve significantly with increasing the switching frequency, and depend highly on the control strategy used. This paper introduces a simple and fast control strategy for three-phase boost rectifiers. The proposed method maintains the advantages of other schemes, including high efficiency, fast dynamic response, unity power factor, sinusoidal input currents and regulated output voltage. In particular, by the introduction of a modified SVM based on vector classification algorithm, nonlinear function generations and also abc-dq and dq-(alpha)(beta) transformation carried out in conventional SVM-based strategies are avoided. Therefore, there is no need for current regulators in the d-q frame, and control difficulties associated with them are removed. Simulation results on the PSCAD/EMTDC software program confirm the validity of the analytical work.