Optimization of a novel DC-link current modulated interface with 3-phase utility systems to minimize line current harmonics

A novel three-phase utility interface is discussed. The interface draws near-sinusoidal currents from the utility and provides a regulated DC output voltage. The performance of the system is optimized. Simulation results for a three-phase, 208 V (line-to-line), 3 kW system are presented. The sensitivity of the interface to unbalances in various system parameters is examined. Simulation results indicate that a total harmonic distortion in the line currents lower than 5% can be achieved by the interface. It is shown that there is minimal degradation of performance with changes in system parameters