DC/DC converters based on hybrid MMC for HVDC grid interconnection

Rong Zeng, Lie Xu, Liangzhong Yao

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

26 Citations (Scopus)
83 Downloads (Pure)

Abstract

This paper presents a multi-terminal high-power DC/DC converter configuration based on hybrid MMC topology with fault blocking capability for interconnecting HVDC systems. Its main functions include bidirectional power flow, step-up and step-down operation and fault isolation equivalent to a DC circuit breaker. By contrast to the conventional MMC based DC/DC converter, the proposed DC/DC converter with hybrid MMC configuration has the advantage of being able to block the DC/DC converter terminal connecting to faulty DC grid section, while continue operating the other terminals connected to healthy DC grid sections. The proposed DC/DC converter operation is analyzed and its control is described. Simulation results using Matlab/Simulink are presented to demonstrate the robust performance during dc fault conditions.
Original languageEnglish
Title of host publication11th IET International Conference on AC and DC Power Transmission
Pages1-6
Number of pages6
DOIs
Publication statusPublished - 1 Feb 2015

Keywords

  • bidirectional power flow
  • step-up operation
  • step-down operation
  • simulink
  • power transmission faults
  • power system interconnection
  • power grids
  • circuit breakers
  • DC/DC converter

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  • Cite this

    Zeng, R., Xu, L., & Yao, L. (2015). DC/DC converters based on hybrid MMC for HVDC grid interconnection. In 11th IET International Conference on AC and DC Power Transmission (pp. 1-6) https://doi.org/10.1049/cp.2015.0090