Fast Power Control for VSCs to Enhance the Synchronization Stability in Ultra-Weak Grids

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

2 Citations (Scopus)
129 Downloads (Pure)

Abstract

In order to effectively transmit the renewable power to the remote load center, more and more utility-scale renewable generation systems have to be operated under the ultra weak gird condition, i.e., the Short-Circuit Ratio (SCR) of power transmission lines impedance is close to 1. As a result, the steady-state operating point of load angle is close to the stability limit 90°. Even a small grid disturbance can result in small-signal power instability, and trigger off the whole renewable generation system, resulting in catastrophic cascading failure in the power system. In this paper, a novel fast power control method is proposed for the interfacing grid-connected Voltage-Source Converters (VSCs). With this method, the power control bandwidth can be increased far beyond the fundamental frequency, which provides superior dynamic power control performance. More importantly, the load angle can be safely limited within the stable region against the grid disturbance by quickly reducing the input power. As a result, the synchronization stability of VSC is greatly improved. The control method is verified by both analytical models and experimental results.
Original languageEnglish
Title of host publicationProceedings of the IEEE Power & Energy Society General Meeting (PESGM 2018)
Number of pages5
Place of PublicationUSA
PublisherIEEE
Publication dateAug 2018
Pages1-5
ISBN (Print)978-1-5386-7704-9
ISBN (Electronic)978-1-5386-7703-2
DOIs
Publication statusPublished - Aug 2018
EventIEEE Power and Energy Society General Meeting, PESGM 2018 - Portland, United States
Duration: 5 Aug 20189 Aug 2018

Conference

ConferenceIEEE Power and Energy Society General Meeting, PESGM 2018
CountryUnited States
CityPortland
Period05/08/201809/08/2018
SeriesIEEE Power and Energy Society General Meeting
ISSN1944-9925

Keywords

  • Synchronization stability
  • fast power control
  • Voltage source converter (VSC)
  • ultra-weak grid condition

Fingerprint Dive into the research topics of 'Fast Power Control for VSCs to Enhance the Synchronization Stability in Ultra-Weak Grids'. Together they form a unique fingerprint.

  • Cite this

    Yang, D., Wang, X., & Blaabjerg, F. (2018). Fast Power Control for VSCs to Enhance the Synchronization Stability in Ultra-Weak Grids. In Proceedings of the IEEE Power & Energy Society General Meeting (PESGM 2018) (pp. 1-5). IEEE. IEEE Power and Energy Society General Meeting https://doi.org/10.1109/PESGM.2018.8586308