2011•IEEE Transactions on Power ElectronicsRequires access

Research on Three-phase Four-wire VIENNA Rectifier and Its Digital Control Strategy

Yao Wenxi

Abstract

A three-phase four-wire three-level rectifier with power factor correction(PFC) is analyzed.This rectifier can be decoupled in topology to three single-phase three-level PFC rectifiers,with their outputs parallel connected.A single-phase three-level PFC topology is analyzed at length.And a dual-closed-loop strategy based on direct control of current is intro-duced.The simulation and experimental results testify that this rectifier can nearly get unity grid power factor.

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Key concepts: Rectifier (neural networks), Precision rectifier, Topology (electrical circuits), Power factor, Three-phase, Control theory (sociology), Power (physics), AC power