Development of multiple space vector control for direct connected parallel current source power converters

Abstract

The current source self-commutated converter has been developed for use in motor drive systems. However it has technical problems such as L-C series resonance, the requirement of transformers for multiple converter connections and DC current unbalance in the converters. This paper presents a new control method to solve these problems for converters connected directly in parallel. The control method consists of a multiple space vector control including resonance suppression control. Results of a mini-model experiment confirming the control method is also presented.