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

Bassim M. H. Jassim; Bashar Zahawi; David J. Atkinson

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

Bassim M. H. Jassim

Bashar Zahawi

David J. Atkinson

Vol. 15, No. 1, pp. 116-122, Jan. 2015

10.6113/JPE.2015.15.1.116

Control of power electronic converters

Current control

DC-AC power conversion

Parallel operation

PWM converters

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Abstract

This paper presents a new current sharing control strategy for parallel-connected, synchronised three-phase DC-AC convertersemploying 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 connectedequally rated converters. Accordingly, any inter-module reactors or circulating current control will be redundant, leading toreductions in system costs, size, and control algorithm complexity. Each converter in the new scheme employs a synchronous dqcurrent regulator that uses only local information to attain a desired converter current. A stability analysis of the current controller isincluded together with a simulation of the converter and load current waveforms. Experimental results from a 2.5kVA test rig areincluded to verify the proposed control method.

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Cite this article

[IEEE Style]

B. M. H. Jassim, B. Zahawi, D. J. Atkinson, "Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors," Journal of Power Electronics, vol. 15, no. 1, pp. 116-122, 2015. DOI: 10.6113/JPE.2015.15.1.116.

[ACM Style]

Bassim M. H. Jassim, Bashar Zahawi, and David J. Atkinson. 2015. Control of Parallel Connected Three-Phase PWM Converters without Inter-Module Reactors. Journal of Power Electronics, 15, 1, (2015), 116-122. DOI: 10.6113/JPE.2015.15.1.116.