Four-channel control of hybrid MMC with pole-to-ground DC fault ride through capability

Wang Xiang, Weixing Lin, Jinyu Wen, Cheng Luo

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

4 Citations (Scopus)
4 Downloads (Pure)

Abstract

Compared with half bridge MMC, the hybrid MMC based on full bridge sub-modules (FBSM) and half bridge sub-modules (HBSM) has more control freedoms. It has been reported that the hybrid MMC can regulate the cell capacitor voltages independent of the DC-link voltage. Thus it is able to ride through pole-to-pole DC fault without tripping IGBTs. But few literatures studied the fault ride through control of pole-to-ground (PTG) DC fault which happens more commonly and frequently. To ride through PTG DC fault, this paper presents a four-channel control for symmetrical monopole hybrid MMC. Firstly, system dynamics of hybrid MMC under PTG DC fault is analysed. Based on the analysis, a four-channel control scheme is proposed for hybrid MMC. This controller is mainly composed of a DC current control loop, an aC current control loop and outer control loops. Fault ride through capability under permanent and temporary PTG DC faults is verified by simulations using PSCaD/EMTDC.

Original languageEnglish
Title of host publication2017 IEEE Power and Energy Society General Meeting, PESGM 2017
Pages1-5
Number of pages5
Volume2018-January
ISBN (Electronic)9781538622124
DOIs
Publication statusPublished - 29 Jan 2018
Event2017 IEEE Power and Energy Society General Meeting, PESGM 2017 - Chicago, United States
Duration: 16 Jul 201720 Jul 2017

Conference

Conference2017 IEEE Power and Energy Society General Meeting, PESGM 2017
CountryUnited States
CityChicago
Period16/07/1720/07/17

Keywords

  • fault ride through
  • high voltage dc transmission (HVDC)
  • hybrid MMC
  • pole-to-ground DC fault
  • circuit faults
  • voltage control
  • modulation

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