Average Current Control for Parallel Connected Converters

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

Average Current Control for Parallel Connected Converters

Bassim M. H. Jassim

Bashar Zahawi

David J. Atkinson

Vol. 19, No. 5, pp. 1153-1161, Sep. 2019

https://doi.org/10.6113/JPE.2019.19.5.1153

Converters

Current control

DC-AC power conversion

PWM converters

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Abstract

A current sharing controller is proposed in this paper for parallel-connected converters. The proposed controller is based on the calculation of the magnitudes of system current space vectors. Good current distribution between parallel converters is achieved with only one Proportional-Integral (PI) compensator. The proposed controller is analyzed and the circulating current impedance is derived for paralleled systems. The performance of the new control strategy is experimentally verified using two parallel connected converters employing Space Vector Pulse Width Modulation (SVPWM) feeding a passive RL load and a 2.2 kW three-phase induction motor load. The obtained test results show a reduction in the current imbalance ratio between the converters in the experimental setup from 53.9% to only 0.2% with the induction motor load.

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Cite this article

[IEEE Style]

B. M. H. Jassim, B. Zahawi, D. J. Atkinson, "Average Current Control for Parallel Connected Converters," Journal of Power Electronics, vol. 19, no. 5, pp. 1153-1161, 2019. DOI: https://doi.org/10.6113/JPE.2019.19.5.1153.

[ACM Style]

Bassim M. H. Jassim, Bashar Zahawi, and David J. Atkinson. 2019. Average Current Control for Parallel Connected Converters. Journal of Power Electronics, 19, 5, (2019), 1153-1161. DOI: https://doi.org/10.6113/JPE.2019.19.5.1153.