Multivariable DG impedance modeling for the microgrid stability assessment

Maher A. Azzouz, Ehab F.El Saadany

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

7 Scopus citations

Abstract

Stability of inverter-based distributed generation units (DGs) is highly dependent on the ratio of DG impedance to grid impedance. To assess the system stability both DG and grid impedances should be known beforehand. This paper proposes a multivariable impedance model for droop-based DGs that are typically employed in microgrids. The proposed model is essential when assessing the microgrid stability and can be utilized to design DG adaptive controllers that mitigate the instability issues triggered by grid impedance variations. A frequency sweep identification method with chirp excitation is used to validate the proposed DG impedance model. The results confirm the accuracy of the proposed DG impedance model in contrast with the estimated one.

Original languageBritish English
Title of host publicationISCAS 2016 - IEEE International Symposium on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1642-1645
Number of pages4
ISBN (Electronic)9781479953400
DOIs
StatePublished - 29 Jul 2016
Event2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016 - Montreal, Canada
Duration: 22 May 201625 May 2016

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2016-July
ISSN (Print)0271-4310

Conference

Conference2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016
Country/TerritoryCanada
CityMontreal
Period22/05/1625/05/16

Keywords

  • Distributed Generation
  • Impedance modeling
  • Impedance stability

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