A Novel Four Terminal Integrated Submodule Modular Multilevel Converter

Rahul Mishra, Vivek Agarwal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Modular multilevel converters (MMC) are extensively used in high voltage direct current (HVDC), flexible AC transmission system (FACTS) and high voltage, high power applications such as motor drive systems. The conventional MMC suffers from low frequency fluctuation in submodule (SM) capacitor's voltage. As a result of this, employment of high value capacitance (typically in mF) becomes mandatory. In addition to this, all the capacitors in conventional MMC are not actively utilized by the circuit as some capacitors get bypassed or remain floating. The two aforementioned issues make the use of bulky capacitors mandatory and also increase the capacitor count in the topology. In this paper, a novel scheme of sharing the capacitors between sub-modules is introduced to mitigate these issues. A novel four terminal integrated SM (FTIS) is proposed by combining the upper and lower SM of the conventional MMC. This concept reduces the number of SM capacitors to half as compared to the conventional MMC topology. Three-level and five-level FTIS-MMC are simulated and validated in MATLAB/SIMULINK environment. Various waveforms are showcased under different conditions to show the efficacy of proposed converter.

Original languageEnglish
Title of host publicationProceedings of 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538693155
DOIs
StatePublished - Jul 2 2018
Externally publishedYes
Event8th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018 - Chennai, India
Duration: Dec 18 2018Dec 21 2018

Publication series

NameProceedings of 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018

Conference

Conference8th IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018
Country/TerritoryIndia
CityChennai
Period12/18/1812/21/18

Keywords

  • Capacitor's count reduction
  • Four terminal integrated submodule (FTIS)
  • Modular multilevel converter (MMC)

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