Performance Evaluation of an Active Neutral-Point-Clamped Multilevel Converter for Active Filtering in G2V-V2G and V2H Applications

This paper presents the performance evaluation of a proposed single-phase bidirectional active neutral-point-clamped (ANPC) five-level converter (5LC) for filtering in grid-to-vehicle (G2V), vehicle-to-grid (V2G) and vehicle-to-home (V2H) applications. In system, 5LC is series-connected with an electric vehicle battery charger based on dual half-bridge DC-DC (DAHBC). A cascaded strategy proportional-resonant compensator controls whereas DAHBC controlled by single phase-shift technique. comparison carried out topology versus three NPC/ANPC 5L converters found literature similar topologies. The simulation results obtained MATLAB-SimPowerSystems along experimental from laboratory prototype validate following: a) first two topologies have highest efficiencies, but they are incapable balancing voltage split-capacitors what increases total harmonic distortion both grid current G2V/V2G modes output V2H mode while producing sluggish transient response, b) 3rd like one properly balance capacitors achieve faster dynamics, at expense efficiency reduction, c) unlike former that continuously applies natural wasting unfedback strategy, includes closed-loop control allows achieving ANPC superior featured higher efficiency, reduced switches stress, flatter power losses distribution better quality improving under operation.