Modular Multilevel Series/Parallel Converter for Bipolar DC Distribution and Transmission

Ricardo Lizana F., Sebastian Rivera*, Zhongxi Li, Apparao Dekka, Luis Rosenthal, Hans Bahamonde I., Angel V. Peterchev, Stefan M. Goetz

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

This article proposes a novel bipolar-type dc system suitable for both distribution and transmission systems based on modular multilevel series/parallel converters (MMSPCs). The system features decoupled operations of each pole of the bipolar system, being able to operate in both asymmetrical and regenerative modes. This enables two independent dc systems by using a single grid-tied converter. The MMSPC is based on a three-switch cell configuration and enables a simple balancing mechanism in combination with a wide range of output voltage frequencies. The simple balancing mechanism is the key to enable the dc operation and lead to simpler scalability for different voltage levels. Theoretical studies and experimental results are provided to verify and characterize the proposed system.

Original languageEnglish
Article number9103569
Pages (from-to)1765-1779
Number of pages15
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Volume9
Issue number2
DOIs
Publication statusPublished - Apr 2021
Externally publishedYes

Keywords

  • Dc bipolar systems
  • dc distribution
  • dc transmission
  • multilevel converter

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