A new fault-ride-through strategy for MTDC networks incorporating wind farms and modular multi-level converters

D. Tzelepis, A. Oulis Rousis, A. Dyśko, C. Booth, G. Strbac

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Abstract

This paper presents a DC voltage control strategy for enhancing the fault-ride-through (FRT) capability of wind farms comprising of fully rated converter permanent magnet synchronous generators (FRC-PMSGs) connected to multi-terminal high voltage direct current (MT-HVDC) grids through modular multi-level converters (MMCs). The proposed FRT strategy is implemented on a master controller located in the offshore AC substation of each wind farm. The underlying issue addressed via the scheme relates to overvoltages in the HVDC links when the power transfer is disrupted due to faults occurring in the AC onshore grid. The corresponding Matlab/Simulinkr model has been validated using transient simulation, while the practical feasibility of the controller is demonstrated utilising Opal-RT© real-time hardware platform.
Original languageEnglish
Pages (from-to)104-113
Number of pages10
JournalInternational Journal of Electrical Power and Energy Systems
Volume92
Early online date8 May 2017
DOIs
Publication statusE-pub ahead of print - 8 May 2017

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Keywords

  • fault-ride-through
  • multi-terminal high voltage direct current
  • modular multilevel converters
  • DC voltage control
  • permanent magnet synchronous generators
  • wind farms

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