Number of Levels, Arm Inductance and Modulation Trade-offs for High Power Medium Voltage Grid-Connected Modular Multilevel Converters

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37 Downloads (Pure)

Abstract

There is an increasing focus on integrating flexible dc links for bulk power routing in medium voltage distribution grids. In such applications, the ac-dc Modular Multilevel Converter (MMC) devised for medium voltage and high-power ratings can be an interesting choice. This paper highlights some less explored design trade-offs arising due to the limitation on N in relation to modulation frequency and arm inductance. Specifically, the study intends to describe the interdependent influence of each degree of freedom on several aspects such as capacitor voltage balancing, circulating currents and harmonic performance. Finally, the importance of considering interhar-monies in the performance assessment of the MMC instead of the conventional interpretation of distortion calculation is highlighted.

Original languageEnglish
Title of host publication2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia)
PublisherIEEE
Pages197-204
Number of pages8
ISBN (Electronic)978-89-5708-313-0
ISBN (Print)978-1-7281-1612-9
Publication statusPublished - 2019
Event10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia: 10th International Conference on Power Electronics - Busan, Korea, Republic of
Duration: 27 May 201930 May 2019
Conference number: 10th

Conference

Conference10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
CountryKorea, Republic of
CityBusan
Period27/05/1930/05/19

Keywords

  • Capacitor voltage balancing
  • Circulating current
  • Design steps
  • Grid-connected
  • Harmonic performance
  • Optimal submodules

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