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Experimental verification of three-phase four-wire current-regulated PWM converter

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2 Author(s)
Lin, B.-R. ; Dept. of Electr. Eng., Univ. of Sci. & Technol., Yunlin, Taiwan ; Yang, T.-Y.

A bidirectional power flow, three-phase AC/DC converter is presented to implement power factor correction, regulate the DC-bus voltage and draw balanced and sinusoidal line currents from AC source. Four switches are adopted in each converter leg to generate a three-level PWM waveform on the AC terminal to neutral-point voltages. Compared with conventional three-phase three-level converters, the proposed converter has a simpler circuit configuration and fewer power semiconductors. The classical proportional-integral voltage controller and carrier-based current controller are adopted in the outer loop and inner loop to implement DC-bus voltage regulation and current-command tracking, respectively. Simulation and experimental results verify the validity and effectiveness of the control scheme.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:152 ,  Issue: 3 )