Phase current compensation method for 3-Level NPC Dual Battery Pack charge/discharge system

Abstract

This paper proposes a phase current compensation method for a 3-Level NPC Dual Battery Pack charge/ discharge system. In this system, a DC link imbalance could cause distortion in the space vector diagram, which would cause distortion in the NPC phase current. The proposed compensation method eliminates this distortion. In this paper, the compensation method is proposed and verified by simulation.