Flexible power control of virtual synchronous generators under unbalanced grid voltage conditions

Meng Chen, Xiangning Xiao, Chang Yuan, Shun Tao

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

9 Citations (Scopus)

Abstract

The stability problems of power electronics interfaced distributed generators with low inertia and damping can be well solved by the virtual synchronous generator technologies. However, when the grid voltages become unbalanced, oscillations in both the real and reactive power will arise with unbalanced voltages and currents of VSG being noticed. This paper proposed a flexible power control method of virtual synchronous generator under unbalanced grid conditions. Firstly the basic principle of the traditional virtual synchronous generator control method is briefly introduced. Then three different control strategies are presented based on control of negative-sequence voltage at PCC in d-q frame. Performance of these three control strategies are compared in PSCAD/EMTDC simulations. Finally, a RTDS-based real-Time digital and physical close-loop experimental test bed is built to verify the proposed control strategy furtherly.
Original languageEnglish
Title of host publication2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Number of pages8
PublisherIEEE
Publication date2017
Pages2881-2888
ISBN (Electronic)9781509029983
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 - Cincinnati, United States
Duration: 1 Oct 20175 Oct 2017

Conference

Conference9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017
Country/TerritoryUnited States
CityCincinnati
Period01/10/201705/10/2017
SponsorIEEE Industry Applications Society (IAS), IEEE Power Electronics Society (PELS)

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

  • Distributed power generation
  • Energy storage system
  • Power oscillation, positive and negative sequence components
  • Unbalanced grid voltages
  • Virtual synchronous generator

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