PLL synchronization stability analysis of MMC-connected wind farms under high-impedance AC Faults

Yingbiao Li, Xiongfei Wang*, Jianbo Guo, Heng Wu, Bing Zhao, Shanshan Wang, Guanglu Wu, Tiezhu Wang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

54 Citations (Scopus)
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Abstract


This article analyzes the transient stability of an offshore wind farm connected via modular multilevel converter (MMC)-based high-voltage direct-current transmission system. The wind farm is composed by full-scale type-4 wind turbines, whereas short-circuit faults occurring in between the MMC and wind farm are considered. The MMC tends to be switched to the current limiting mode or the overmodulation mode during the ac-side fault, which further interacts with the control systems of wind turbines, complicating the transient stability problem of the system. Hence, in this work the parametric impacts of the phase-locked loop of wind turbine converters and over-current/-modulation limiters of the MMC are revealed analytically, and further corroborated by time-domain simulations.
Original languageEnglish
Article number9203975
JournalIEEE Transactions on Power Systems
Volume36
Issue number3
Pages (from-to)2251-2261
Number of pages11
ISSN0885-8950
DOIs
Publication statusPublished - May 2021

Bibliographical note

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • Equilibrium points
  • Modular multilevel converter
  • Short-circuit faults
  • Transient stability
  • Wind power plant

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