An isolated topology for reactive power compensation with a modularized Dynamic-Current building-block

Abstract

This paper presents a novel topology for instantaneous reactive power compensation. The topology is derived from Dynamic-Current or Dyna-C, which is a patented power converter capable of transferring energy for two- or multi-terminal DC, single- and/or multi-phase AC systems. The proposed topology has a modularized low-voltage current source building block that can be stacked for medium-voltage (MV) applications to provide dynamic leading or lagging reactive power. In addition, the phases are coupled through a high-frequency transformer for inter-phase fault isolation among the three-phase. The converter functionality is validated through simulations and experimental results with a 480 V, 75 kVAr prototype.