Modeling and Analysis of 2nd Harmonic Interaction for VSC with Transformer under Saturation Condition

Dongsheng Yang, Xiongfei Wang, Frede Blaabjerg, Yin Sun, Erik de Jong

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

1 Citation (Scopus)
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Abstract

This paper investigates the mechanism behind the 2nd harmonic interaction of a transformer connected Voltage-Source Converter (VSC) under saturation conditions. The detail small-signal models of a saturated transformer and a VSC are derived considering their nonlinear behavior. It is revealed that the frequency coupling from the saturated transformer and the PLL in the VSC may form a positive feedback loop and give rise to a 2nd harmonic amplification. The harmonic amplification gain is established herein, which provides an accurate assessment of the 2nd harmonic interaction. This theoretical analysis is verified by a power hardware in the loop laboratory experiment.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Power Electronics and Application Conference and Exposition (PEAC 2018)
Number of pages6
Place of PublicationChina
PublisherIEEE Press
Publication dateNov 2018
Pages1-6
ISBN (Print)978-1-5386-6055-3
ISBN (Electronic)978-1-5386-6054-6
DOIs
Publication statusPublished - Nov 2018
Event2nd IEEE Power Electronics and Applications Conference and Exposition - Shenzhen, China
Duration: 4 Nov 20187 Nov 2018
Conference number: 2nd
http://www.peac-conf.org/

Conference

Conference2nd IEEE Power Electronics and Applications Conference and Exposition
Number2nd
Country/TerritoryChina
CityShenzhen
Period04/11/201807/11/2018
Internet address

Keywords

  • harmonic interaction
  • transformer core saturation
  • VSC
  • PLL
  • frequency coupling

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