A hybrid modular multilevel converter with novel three-level cells for DC fault blocking capability

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

A novel hybrid, modular multilevel converter is presented that utilizes a combination of half-bridge and novel three-level cells where the three-level cells utilize a clamp circuit which, under dc side faults, is capable of blocking fault current thereby avoiding overcurrents in the freewheel diodes. This dc fault blocking capability is demonstrated through simulation and is shown to be as good as the modular multilevel converter which utilizes full-bridge cells but with the added benefits of: lower conduction losses; fewer diode and semiconductor switching devices, and; fewer shoot-through modes. The semiconductor count and conduction loss of the proposed converter are reduced to around 66.5% and 72% of that of modular multilevel converter based on the full-bridge cells respectively, yielding lower semiconductor cost and improved efficiency. Dc fault ride-through operation is realized without exposing the semiconductors to significant fault currents and overvoltages due to the full dc fault blocking capability of the converter.

LanguageEnglish
Pages2017-2026
Number of pages10
JournalIEEE Transactions on Power Delivery
Volume30
Issue number4
Early online date15 Apr 2015
DOIs
Publication statusPublished - 1 Aug 2015

Fingerprint

Semiconductor materials
Electric fault currents
Diodes
Clamping devices
Networks (circuits)
Costs

Keywords

  • DC fault blocking
  • high-voltage dc (HVDC) transmission system
  • hybrid multilevel converter
  • modular multilevel converter (MMC)
  • three-level cell
  • voltage-source converter (VSC)

Cite this

@article{45e98ec55cbe41f6ba4669934b41723b,
title = "A hybrid modular multilevel converter with novel three-level cells for DC fault blocking capability",
abstract = "A novel hybrid, modular multilevel converter is presented that utilizes a combination of half-bridge and novel three-level cells where the three-level cells utilize a clamp circuit which, under dc side faults, is capable of blocking fault current thereby avoiding overcurrents in the freewheel diodes. This dc fault blocking capability is demonstrated through simulation and is shown to be as good as the modular multilevel converter which utilizes full-bridge cells but with the added benefits of: lower conduction losses; fewer diode and semiconductor switching devices, and; fewer shoot-through modes. The semiconductor count and conduction loss of the proposed converter are reduced to around 66.5{\%} and 72{\%} of that of modular multilevel converter based on the full-bridge cells respectively, yielding lower semiconductor cost and improved efficiency. Dc fault ride-through operation is realized without exposing the semiconductors to significant fault currents and overvoltages due to the full dc fault blocking capability of the converter.",
keywords = "DC fault blocking, high-voltage dc (HVDC) transmission system, hybrid multilevel converter, modular multilevel converter (MMC), three-level cell, voltage-source converter (VSC)",
author = "Rui Li and Fletcher, {John E.} and Lie Xu and Derrick Holliday and Williams, {Barry W.}",
note = "(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",
year = "2015",
month = "8",
day = "1",
doi = "10.1109/TPWRD.2015.2423258",
language = "English",
volume = "30",
pages = "2017--2026",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
number = "4",

}

TY - JOUR

T1 - A hybrid modular multilevel converter with novel three-level cells for DC fault blocking capability

AU - Li, Rui

AU - Fletcher, John E.

AU - Xu, Lie

AU - Holliday, Derrick

AU - Williams, Barry W.

N1 - (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - A novel hybrid, modular multilevel converter is presented that utilizes a combination of half-bridge and novel three-level cells where the three-level cells utilize a clamp circuit which, under dc side faults, is capable of blocking fault current thereby avoiding overcurrents in the freewheel diodes. This dc fault blocking capability is demonstrated through simulation and is shown to be as good as the modular multilevel converter which utilizes full-bridge cells but with the added benefits of: lower conduction losses; fewer diode and semiconductor switching devices, and; fewer shoot-through modes. The semiconductor count and conduction loss of the proposed converter are reduced to around 66.5% and 72% of that of modular multilevel converter based on the full-bridge cells respectively, yielding lower semiconductor cost and improved efficiency. Dc fault ride-through operation is realized without exposing the semiconductors to significant fault currents and overvoltages due to the full dc fault blocking capability of the converter.

AB - A novel hybrid, modular multilevel converter is presented that utilizes a combination of half-bridge and novel three-level cells where the three-level cells utilize a clamp circuit which, under dc side faults, is capable of blocking fault current thereby avoiding overcurrents in the freewheel diodes. This dc fault blocking capability is demonstrated through simulation and is shown to be as good as the modular multilevel converter which utilizes full-bridge cells but with the added benefits of: lower conduction losses; fewer diode and semiconductor switching devices, and; fewer shoot-through modes. The semiconductor count and conduction loss of the proposed converter are reduced to around 66.5% and 72% of that of modular multilevel converter based on the full-bridge cells respectively, yielding lower semiconductor cost and improved efficiency. Dc fault ride-through operation is realized without exposing the semiconductors to significant fault currents and overvoltages due to the full dc fault blocking capability of the converter.

KW - DC fault blocking

KW - high-voltage dc (HVDC) transmission system

KW - hybrid multilevel converter

KW - modular multilevel converter (MMC)

KW - three-level cell

KW - voltage-source converter (VSC)

UR - http://www.scopus.com/inward/record.url?scp=84937919070&partnerID=8YFLogxK

U2 - 10.1109/TPWRD.2015.2423258

DO - 10.1109/TPWRD.2015.2423258

M3 - Article

VL - 30

SP - 2017

EP - 2026

JO - IEEE Transactions on Power Delivery

T2 - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 4

ER -