Sub-Synchronous Control Interaction in Grid-Forming VSCs with Droop Control

Yicheng Liao, Xiongfei Wang, Fangcheng Liu, Kai Xin, Yunfeng Liu

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

Abstract

This paper analyzes the sub-synchronous control interaction of droop-controlled grid-forming voltage-source converters (VSCs). The complex-valued impedance model of the droop-controlled VSC in the stationary frame is proposed first, based on which the grid-VSC interaction is characterized. It is revealed that the sub-synchronous resonances can be induced in stiff grids, owing to the interactions of inner voltage control loop and the outer power control loop. Experimental tests corroborate the theoretical analysis.
Original languageEnglish
Title of host publication2019 4th IEEE Workshop on the Electronic Grid, eGRID 2019
PublisherIEEE
Publication dateNov 2019
Article number9092640
ISBN (Print)978-1-7281-5705-4
ISBN (Electronic)9781728157047
DOIs
Publication statusPublished - Nov 2019
Event4th IEEE Workshop on the Electronic Grid, eGRID 2019 - Xiamen, China
Duration: 11 Nov 201914 Nov 2019

Conference

Conference4th IEEE Workshop on the Electronic Grid, eGRID 2019
CountryChina
CityXiamen
Period11/11/201914/11/2019

Keywords

  • Droop control
  • Grid forming
  • Sub-synchronous resonance
  • Voltage control
  • Voltage-source converter

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    Liao, Y., Wang, X., Liu, F., Xin, K., & Liu, Y. (2019). Sub-Synchronous Control Interaction in Grid-Forming VSCs with Droop Control. In 2019 4th IEEE Workshop on the Electronic Grid, eGRID 2019 [9092640] IEEE. https://doi.org/10.1109/eGRID48402.2019.9092640