Advanced automated emergency control strategy for embedded VSC-HVDC links

Stefan Christian Polster*, Herwig Renner, Katrin Friedl, Olof Samuelsson

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This paper proposes an advanced emergency control strategy for embedded VSC-HVDC links after AC disturbances, such as line tripping and generation loss. The control goals are to minimize the impact of the disturbance on the AC-network, which includes improving the long-term voltage stability with utilizing possible unloading capacity of parallel AC elements. The proposed algorithm is evaluated against other control strategies for embedded VSC-HVDC links by applying it to a simple demonstration network. The test system includes all necessary VSC converter dynamics, the VSC-HVDC link current and voltage limits and simple load recovery characteristics for an evaluation of the long term voltage stability. The simulation results are explained and the advantages of the proposed emergency control strategy are discussed.
Original languageEnglish
Number of pages6
Journale&i - Elektrotechnik und Informationstechnik
Volume137
Issue number8
Publication statusE-pub ahead of print - 15 Oct 2020

Keywords

  • VSC-HVDC links
  • long term voltage stability
  • cascading line tripping
  • emergency control scheme

Fields of Expertise

  • Sustainable Systems

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