access icon free Analysis and implementation of a three-phase power factor correction scheme using modular Cuk rectifier for balanced and unbalanced supply conditions

© The Institution of Engineering and Technology
Received 20/05/2012, Accepted 06/08/2013, Revised 22/07/2013, Published

In this study, the analysis and design of a three-phase AC–DC converter followed by DC–DC Cuk converter modules to achieve unity power factor is presented. Two methods of reference current generation techniques are employed. In the first scheme, reference current is generated using instantaneous symmetrical component theory under balanced supply conditions. In the second scheme, extended synchronous detection methods such as equal current criterion, equal power criterion and equal impedance criterion are used for reference current generation under unbalanced supply conditions. The control strategy uses three hysteresis current controllers for source current shaping and an outer voltage loop with proportional-integral controller for load voltage regulation. To validate the proposed method, a prototype controlled by dSPACE signal processor is set up. Simulation and experimental results indicate that the proposed system offers regulated output voltage for wide load variations and provides power factor close to unity.

Inspec keywords: voltage control; AC-DC power convertors; load regulation; power factor correction; PI control; electric current control; DC-DC power convertors

Other keywords: reference current generation techniques; outer voltage loop; unbalanced supply conditions; impedance criterion; balanced supply conditions; reference current generation; dSPACE signal processor; equal power criterion; modular Cuk rectifier; DC–DC Cuk converter modules; load voltage regulation; proportional-integral controller; control strategy; three-phase AC–DC converter; extended synchronous detection methods; equal current criterion; regulated output voltage; source current shaping; symmetrical component theory; three hysteresis current controllers; wide load variations; unity power factor; three-phase power factor correction

Subjects: Voltage control; Control of electric power systems; Current control; Power system control; Power convertors and power supplies to apparatus

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