Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 26, Issue 1, Pages 249-259Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2010.2052633
Keywords
12-pulse rectifier; closed-loop current control; space-vector modulation
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This paper presents a novel closed-loop current-control strategy for a hybrid 12-pulse rectifier that uses a two-switch boost stage for output-voltage regulation. Unlike previous attempts to mitigate input-current distortion, e. g., by modulating the rectifier output voltage with open-loop control, this new closed-loop current-control scheme directly controls the line-interphase-transformer input voltage and/or impresses sinusoidal input currents. In this paper, the control strategy is explained and the modulation functions for each (mu/6)-wide mains voltage sector are derived. The hardware implementation is described, and experimental results demonstrate that the control strategy ensures a high-quality input current for ideal as well as for distorted/unbalanced mains.
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