Half-bridge modular multilevel-based HVDC converters with external pre-charged capacitors for dc fault current suppression capability

Ahmed Elserougi, Shehab Ahmed, Ahmed Massoud

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Half-Bridge Modular Multilevel Converters (HB-MMCs) are defenseless against DC side faults. Different types of DC Circuit Breakers (DCCBs) assisted with arrester banks/damping resistors such as solid-state CBs and hybrid DCCBs can be used to interrupt the DC fault current. Arrester banks are used to block any overvoltage after interrupting the fault current and in turn to demagnetize the circuit inductors. The main disadvantage of the arresters is that they forcibly break apart when they are overloaded. In this work, an arrester-less DC fault current limiter is proposed for HB-MMC configuration. The proposed DC fault current limiter has two pre-charged capacitors in series with transmission poles. These pre-charged capacitors are bypassed during normal conditions, while they are inserted in the DC current path during DC side fault to limit the grid current contribution into the dc fault. The proposed protection scheme is assessed using a simulation study.

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
Volume2016
EditionCP684
DOIs
Publication statusPublished - 2016
Event8th IET International Conference on Power Electronics, Machines and Drives, PEMD 2016 - Glasgow, United Kingdom
Duration: 19 Apr 201621 Apr 2016

Other

Other8th IET International Conference on Power Electronics, Machines and Drives, PEMD 2016
CountryUnited Kingdom
CityGlasgow
Period19/4/1621/4/16

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Keywords

  • DC fault
  • Fault current suppression
  • HVDC
  • Modular multilevel converter.

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Elserougi, A., Ahmed, S., & Massoud, A. (2016). Half-bridge modular multilevel-based HVDC converters with external pre-charged capacitors for dc fault current suppression capability. In IET Conference Publications (CP684 ed., Vol. 2016). Institution of Engineering and Technology. https://doi.org/10.1049/cp.2016.0186