MODULATION TECHNIQUE FOR A SINGLE-STAGE THREE-PHASE BIDIRECTIONAL AC/DC CONVERTER WITH PFC AND HIGH-FREQUENCY ISOLATION

This paper proposes a single-stage three-phase ac-dc converter with high-frequency isolation, power factor correction, and bidirectional power flow. The presented topology is adequate for dc grids (or smart-grids),... [ view full abstract ]

This paper proposes a single-stage three-phase ac-dc converter with high-frequency isolation, power factor correction, and bidirectional power flow. The presented topology is adequate for dc grids (or smart-grids), telecommunications (telecom) power supplies, and more recent applications such as electric vehicles. The converter is based on the three-phase version of the dual active bridge (DAB) associated with the three-state-switching cell (3SSC), whose power flow between the primary and secondary sides is controlled by the phase-shift angle. A theoretical analysis is presented and validated through simulation.