Investigation on the Combined Effect of VSC-Based Sources and Synchronous Condensers Under Grid Unbalanced Faults

Vahan Gevorgian, Jundi Jia, Guangya Yang, Arne Nielsen

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39 Scopus Citations

Abstract

The short circuit response of voltage source converters (VSCs) could be significantly different from that of synchronous condensers (SCs) under unbalanced faults. This paper investigates the combined effect of VSC-based sources and synchronous condensers under grid unbalanced faults considering two groups of VSC fault-ride-through control strategies. It aims to provide an evaluation of typical control strategies and to explore the impact of equipping a synchronous condenser at the point of common coupling (PCC). By examining the combined short-circuit currents, PCC voltages, DC-side voltages, and system frequency responses, this study points out the merits and demerits of the examined control strategies, illustrates the benefits of synchronous condensers on mitigating the disadvantages of certain control strategies, and provides suggestions on selecting the control strategies for the VSC when incorporating a synchronous condenser at the PCC.

Original languageAmerican English
Article number8703887
Pages (from-to)1898-1908
Number of pages11
JournalIEEE Transactions on Power Delivery
Volume34
Issue number5
DOIs
StatePublished - Oct 2019

Bibliographical note

Publisher Copyright:
© 1986-2012 IEEE.

NREL Publication Number

  • NREL/JA-5D00-75393

Keywords

  • Converter
  • inertia
  • short-circuit power
  • synchronous condensers
  • unbalanced faults

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