AC Fault Clearing within an MMC-Based DC Hub

M. Poikilidis, E. Kontos, Pavol Bauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

As the number of high voltage (HVDC) installations is increasing, there is a growing need for interconnection to create more efficient grids. To tackle the main challenges in HVDC grids, a multiport DC-DC converter, often referred to as DC hub, is considered a solution. This paper provides a methodology for the clearing of AC faults within the DC hub and the protection of the system during a fault. A methodology is also presented for the safe connection or disconnection of additional ports from the DC hub without affecting the operation of the other ports. A design based on modular multilevel converters (MMC) is chosen due to their inherent advantages and its control operation is described. A DC hub was modelled in Matlab/Simulink and was tested in a case study including the interconnection of three DC lines in symmetric monopolar configuration, operating at different voltage levels.

Original languageEnglish
Title of host publication2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
PublisherIEEE
Pages1-8
Number of pages8
ISBN (Electronic)978-89-5708-313-0
ISBN (Print)978-1-7281-1612-9
Publication statusPublished - 2019
Event10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia: 10th International Conference on Power Electronics - Busan, Korea, Republic of
Duration: 27 May 201930 May 2019
Conference number: 10th

Conference

Conference10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
CountryKorea, Republic of
CityBusan
Period27/05/1930/05/19

Keywords

  • AC faults
  • DC Hub
  • DC-DC converter
  • HVDC

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