Investigation of Grid-connected Voltage Source Converter Performance under Unbalanced Faults

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

474 Downloads (Pure)

Abstract

Renewable energy sources (RES) and HVDC links are typically interfaced with the grid by power converters, whose performance during grid faults is significantly different from that of traditional synchronous generators. This paper investigates the performance of grid-connected voltage source converters (VSCs) under unbalanced faults. Conventional positive-sequence synchronous reference frame (SRF) control is presented first, followed by three different negative-sequence current control strategies considering reactive power injection and converter current limit. The simulation results indicate that the performance of VSCs varies with their control strategies.
Negative-sequence current control is necessary to restrict converter current in each phase under unbalanced faults. Among presented control strategies, the balanced current control strategy complies with the present voltage support requirement best and further requirements should be specified if a set of controlled unbalanced current is expected under unbalanced faults.
Original languageEnglish
Title of host publicationProceedings of 2016 IEEE PES Asia-Pacific Power and Energy Conference
PublisherIEEE
Publication date2016
Pages609-613
ISBN (Print)978-1-5090-5417-6
DOIs
Publication statusPublished - 2016
Event2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference - Xi'an, China
Duration: 25 Oct 201628 Oct 2016

Conference

Conference2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference
CountryChina
CityXi'an
Period25/10/201628/10/2016

Keywords

  • Converter control
  • Fault ride through
  • Reactive power
  • Short circuit current
  • Unbalanced faults

Cite this

Jia, J., Yang, G., & Nielsen, A. H. (2016). Investigation of Grid-connected Voltage Source Converter Performance under Unbalanced Faults. In Proceedings of 2016 IEEE PES Asia-Pacific Power and Energy Conference (pp. 609-613). IEEE. https://doi.org/10.1109/APPEEC.2016.7779576