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Average current control for parallel connected converters

Lookup NU author(s): Bassim Jassim, Dr Bashar Zahawi, Dr David Atkinson

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Abstract

© 2019 KIPE.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.

Publication metadata

Author(s): Jassim MHB, Zahawi B, Atkinson DJ

Publication type: Article

Publication status: Published

Journal: Journal of Power Electronics

Year: 2019

Volume: 19

Issue: 5

Pages: 1153-1161

Online publication date: 20/09/2019

Acceptance date: 18/05/2019

ISSN (print): 1598-2092

ISSN (electronic): 2093-4718

Publisher: Korean Institute of Power Electronics

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

DOI: 10.6113/JPE.2019.19.5.1153

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