DC network stability and dynamic analysis using virtual impedance method

Dong Chen, Lie Xu, Liangzhong Yao

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

17 Citations (Scopus)


A stability and dynamic assessment method is proposed for converter interfaced DC networks. With the current loop modeled as a 1st order delay, an actively controlled DC terminal converter and its control can be modeled as a virtual impedance in S-domain. Terminal transfer functions can therefore be obtained using Thevenin's equivalent. Based on the modeling method, a case study concerning voltage variation suppression in a multi-terminal DC network is performed using root locus and open-loop margin analysis. The accuracy of the developed DC network model and its effectiveness for assessing system stability and dynamic performance is validated using circuit simulation in time domain.
Original languageEnglish
Title of host publicationIECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Pages5625 - 5630
Number of pages6
ISBN (Print)978-1-4673-2419-9
Publication statusPublished - Oct 2012
EventIEEE IECON 2012 - Montreal, Canada
Duration: 15 Oct 2012 → …


ConferenceIEEE IECON 2012
Period15/10/12 → …


  • DC dynamic analysis
  • dynamic assessment method
  • terminal transfer functions
  • open-loop margin analysis


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