Average current control for parallel connected converters

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

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

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.

Original languageBritish English
Pages (from-to)1153-1161
Number of pages9
JournalJournal of Power Electronics
Volume19
Issue number5
DOIs
StatePublished - Sep 2019

Keywords

  • Converters
  • Current control
  • Dc-ac power conversion
  • Pwm converters

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