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http://dx.doi.org/10.6113/JPE.2015.15.1.116

Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors  

Jassim, Bassim M.H. (College of Engineering, Baghdad University)
Zahawi, Bashar (Department of Electrical and Computer Engineering, Khalifa University)
Atkinson, David J. (School of Electrical and Electronic Engineering, Newcastle University)
Publication Information
Journal of Power Electronics / v.15, no.1, 2015 , pp. 116-122 More about this Journal
Abstract
This paper presents a new current sharing control strategy for parallel-connected, synchronised three-phase DC-AC converters employing space vector pulse width modulation (SVPWM) without current sharing reactors. Unlike conventional control methods, the proposed method breaks the paths of the circulating current by dividing the switching cycle evenly between parallel connected equally rated converters. Accordingly, any inter-module reactors or circulating current control will be redundant, leading to reductions in system costs, size, and control algorithm complexity. Each converter in the new scheme employs a synchronous dq current regulator that uses only local information to attain a desired converter current. A stability analysis of the current controller is included together with a simulation of the converter and load current waveforms. Experimental results from a 2.5kVA test rig are included to verify the proposed control method.
Keywords
Control of power electronic converters; Current control; DC-AC power conversion; Parallel operation; PWM converters;
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Times Cited By KSCI : 5  (Citation Analysis)
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