A Dual Modular Multilevel Converter with High-Frequency Circulating Current Injection for MV Open-End Stator Winding Machine Drives

Mohamed Diab, Xibo Yuan, Barry Williams

Research output: Contribution to conferenceConference Paperpeer-review

10 Downloads (Pure)

Abstract

Since its emergence in 2002, the modular multilevel converter (MMC) has been extensively addressed as a promising candidate for medium-voltage machine drives. However, the MMC application as a variable-speed drive experiences a serious challenge pertinent to its unique operating principles, resulting in wide voltage fluctuations across the MMC floating capacitors inversely proportional to the operating frequency. The high-frequency circulating current injection is the mainstream approach to suppress the capacitor voltage ripple at lower operating frequencies, however at the expense of introducing high-frequency common-mode voltage at the machine terminals. This paper adopts the high-frequency circulating current injection approach in a dual MMC topology applicable to open-winding machine drives, with the advantage of mitigating the high-frequency common-mode voltage at the machine terminals by exploiting an inherent feature in open-winding configurations. The theoretical analysis of common-mode voltage mitigation is presented in this paper supported with verification results based on MATLAB simulation.
Original languageEnglish
DOIs
Publication statusPublished - 30 Oct 2020
EventEnergy Conversion Congress and Exposition - Detroit, MI, USA, United States
Duration: 11 Oct 202015 Oct 2020
https://www.ieee-ecce.org/2020/

Conference

ConferenceEnergy Conversion Congress and Exposition
Abbreviated titleECCE 2020
CountryUnited States
Period11/10/2015/10/20
Internet address

Keywords

  • Capacitor voltage ripple
  • common-mode voltage
  • high-frequency injection
  • medium-voltage (MV) drives
  • modular multilevel converter (MMC)
  • open-winding machines
  • variable-speed drives

Fingerprint Dive into the research topics of 'A Dual Modular Multilevel Converter with High-Frequency Circulating Current Injection for MV Open-End Stator Winding Machine Drives'. Together they form a unique fingerprint.

Cite this