A COMPARATIVE-EVALUATION OF HARMONIC REDUCTION TECHNIQUES IN 3-PHASE UTILITY INTERLACE OF POWER ELECTRONIC LOADS

Power electronic loads inject harmonic currents into the utility syste m. This paper presents a comparative evaluation of harmonic reduction techniques which satisfy the current harmonic limits specified by the IEEE Standard 519, and at the same time provide a regulated de output voltage. The techniques considered include active and hybrid filters, and various current waveshaping approaches for a three-phase utility i nterface. These techniques are compared in terms of their complexity ( number of switches) and their component ratings. Based on the applicat ion requirements and the cost of active and passive components, this p aper enables the estimation of the minimum cost topology.