High Frequency Link Ripple Power Compensation Strategies for 3-phase-1-phase Interoperable Bidirectional Isolated AC-DC Matrix Converters

Recently, there has been a strong focus on the application and development of interoperable converters in various areas of power electronics, with one such application being that of electric vehicle chargers. The work in this paper is intended to address the ripple power compensation required during the 1-ϕ operation of such interoperable converters. Particularly, an active power decoupling cell with minimal additional circuitry is proposed that operates at the high frequency link of the topology. The conceptual development of the cell is first described, which reveals a constraint in its operation. Thereby, some topological changes are introduced that help circumvent the constraint. This is followed by a detailed description of the working of the overall topology, which is corroborated by simulation results obtained by considering a 400 V, 3.45 kW electric vehicle battery as a load. Lastly, key inferences and observations of the findings are discussed.