A parallel impedance based criteria and active damping control for DC microgrid stability

Xueying Wang, Tao Zheng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Multiple converters and negative impedance characteristics of constant power loads of DC microgrid will lead system instability. First, the equivalent input and output impedance of the system have been obtained. Based on the Nyquist stability criterion, a passivity based parallel impedance method has been proposed to determine the system voltage stability. The proposed method can transform the stability problem into the system passivity problem and its performance was compared with the traditional impedance ratio criterion. Secondly, in order to improve the stability of DC microgrid, an active damping control method based on the feed current of the DC converter is proposed. The design principle of the active damping parameters is given. PSCAD simulation results verify the effectiveness of the proposed method.

Original languageEnglish
Title of host publication2018 China International Conference on Electricity Distribution, CICED 2018 - Proceedings
PublisherIEEE Computer Society
Pages1346-1351
Number of pages6
ISBN (Electronic)9781538667750
DOIs
StatePublished - Dec 27 2018
Externally publishedYes
Event2018 China International Conference on Electricity Distribution, CICED 2018 - Tianjin, China
Duration: Sep 17 2018Sep 19 2018

Publication series

NameChina International Conference on Electricity Distribution, CICED
ISSN (Print)2161-7481
ISSN (Electronic)2161-749X

Conference

Conference2018 China International Conference on Electricity Distribution, CICED 2018
Country/TerritoryChina
CityTianjin
Period09/17/1809/19/18

Keywords

  • Active damping control
  • DC microgrid
  • Parallel impedance
  • Voltage stability

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