Abstract

This paper compares the attributes of various rectifier topologies that are available for three-phase AC to DC power conversion. The primary goal is to reduce the line current harmonics by the use of various 12-pulse converters, 18-pulse converters, or active front-end converters. The attributes that will be compared are the total harmonic current distortion, total harmonic voltage distortion and power factor. When operating multiple loads, an additional study will be a comparison of those attributes as the loads are varied. There is also a comparison of parts count, relative reliability, and considerations on relative size and cost. An investigation into the susceptibility of the rectifier system to voltage unbalance and voltage distortion is included. Power distribution systems include a moderately stiff source in addition to a back-up generator.

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