A Modular Isolated Topology for Instantaneous Reactive Power Compensation

This paper presents a novel topology for instantaneous reactive power compensation. The topology is derived from the Dynamic-Current or Dyna-C, which is a patented power converter capable of transferring energy for two or multiterminal dc, single- and/or multiphase ac systems. The proposed topology,...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2018-02, Vol.33 (2), p.975-986
Main Authors: Hao Chen, Prasai, Anish, Divan, Deepak
Format: Article
Language:English
Subjects:
Bridge circuits
Capacitors
Compensation
Current source
Discharges (electric)
dynamic current
Electrolytic capacitors
Energy conversion
Energy storage
high-frequency isolation
Inductance
instantaneous compensation
Modular structures
Power converters
Reactive power
reactive power control
Reliability analysis
series stack
Switches
three-phase ac
Topology
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Summary:This paper presents a novel topology for instantaneous reactive power compensation. The topology is derived from the Dynamic-Current or Dyna-C, which is a patented power converter capable of transferring energy for two or multiterminal dc, single- and/or multiphase ac systems. The proposed topology, named dynamic VAr compensator (DVC), has a current source power conversion stage and can provide instantaneous leading or lagging reactive power. The proposed DVC has three individual bridges coupled through a three-winding high-frequency transformer. It has a modular structure that allows it to be series stacked for medium-voltage applications. In addition, the high-frequency Galvanic isolation link provides interphase fault isolation among the three phases. The circuit eliminates the use of electrolytic capacitors for bulk energy storage, which usually lowers life and reliability. Operating principles, theoretical analysis, and design of the proposed topology are described. The converter functionality is validated through simulation as well as experimental results.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2017.2688393