Power dispatch and voltage control in multiterminal HVDC systems: a flexible approach

Ali Raza, Yuchao Liu, Kumars Rouzbehi, Mohsin Jamil, Syed Omer Gilani, Xu Dianguo, Barry W. Williams

Research output: Contribution to journalArticle

24 Citations (Scopus)
128 Downloads (Pure)

Abstract

This paper deals with the power dispatch and direct voltage control in multiterminal high voltage direct current (MT-HVDC) systems. Generalized voltage droop (GVD) control is adopted for voltage source converters (VSC)s of a MT-HVDC system. A mechanism has been designed based on the power ratio within the GVD controlled stations to achieve flexible autonomous coordination control among VSC-HVDC stations, without need for communication. In this paper, several alternatives are considered to guarantee fault ride through of onshore converter stations. The performance of the proposed control strategy is analyzed with time-domain dynamic simulations, in an EMDTC/PSCAD platform, and experimentally validated. Results demonstrate the robust performance and capabilities of the proposed control strategy during changes in the power demand of the ac grids, unexpected change in wind power generation, and eventual permanent VSC-HVDC station disconnection.
Original languageEnglish
Pages (from-to)24608-24616
Number of pages9
JournalIEEE Access
Volume5
DOIs
Publication statusPublished - 24 Oct 2017

Keywords

  • DC voltage droop control
  • offshore wind farms
  • power dispatch
  • VSC-based multiterminal HVDC grid
  • wind power generation

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