Protection of Multi-Terminal VSC-HVDC Grids Based on the Response of the First Carrier Frequency Harmonic Current

Mani Ashouri, Hesam Khazraj, Filipe Miguel Faria da Silva, Claus Leth Bak

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

7 Citations (Scopus)

Abstract

Protection of multi-terminal Voltage Source Converter based High Voltage Direct Current (VSC-MTDC) grids is a major challenge for future practical DC transmission technology. According to the harmonic-based protection studies, the response of first carrier frequency harmonic (FCFH) current in Pulse Width Modulation (PWM)-based VSC-HVDC can be used to discriminate external AC faults in point to point VSC-HVDC systems. However, the application of FCFH current for a selective fault detection system in VSC-MTDC grids is not studied yet. This research investigates FCFH current existed in converter DC link measured data, to detect the faulty section in VSC-MTDC system, when the system face faults with variations in location and resistance. A radial VSC-MTDC system with 2-level PWM VSC converters is simulated in PSCAD and MATLAB is used to extract FCFH current based on short-time Fourier transform. Based on the relay locations, the results show the feasibility of the protection algorithm, in discriminating between internal and faults for each zone.
Original languageEnglish
Title of host publicationProceedings of the 2018 53rd International Universities Power Engineering Conference (UPEC)
Number of pages5
PublisherIEEE Press
Publication dateSep 2018
Pages1-5
ISBN (Print)978-1-5386-2911-6
ISBN (Electronic)978-1-5386-2910-9
DOIs
Publication statusPublished - Sep 2018
Event2018 53rd International Universities Power Engineering Conference - Glasgow, United Kingdom
Duration: 4 Sep 20187 Sep 2018

Conference

Conference2018 53rd International Universities Power Engineering Conference
CountryUnited Kingdom
CityGlasgow
Period04/09/201807/09/2018

Keywords

  • VSC-MTDC
  • Protection
  • Harmonics
  • VSC
  • FCFH Current
  • Singal Processing
  • Short-Time Fourier
  • HVDC

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