Reduced-Rating-Electronic-Capacitor-Based DC Links for Power Electronics Supported Distributed Energy Resources

Pavel Strajnikov, Mor Mordechai Peretz, Alon Kuperman

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Electronic Capacitor (EC) is formed by a bidirectional DC-DC converter terminated with small auxiliary capacitance. The device is capable of mimicking the behavior of a bulk DC link capacitor while actually employing a component with much lower capacitance value. The paper demonstrates that forcing an EC to emulate a negative capacitance while connecting it in series with a passive capacitor leads to DC-DC converter rating reduction and subsequent potential volume reduction and efficiency increase of a DC link. Such a device may replace a traditional bulk DC link capacitor present in power electronics supported distributed energy resources in a plug-and-play manner. Simulations and experiments of a common dual stage AC/DC power conversion system employing the proposed active DC link validate the methodology.

Original languageEnglish
Pages (from-to)3943-3953
Number of pages11
JournalIEEE Transactions on Smart Grid
Volume13
Issue number5
DOIs
StatePublished - 1 Sep 2022

Keywords

  • DC link
  • Multi-converter system
  • electronic capacitor
  • reduced rating

ASJC Scopus subject areas

  • General Computer Science

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