Asymmetrical modular mutilevel converter (A-MMC) based HVDC system

Kartik V. Iyer; Ashish Kumar Sahoo; Ned Mohan

doi:10.1109/ECCE.2015.7310323

Asymmetrical modular mutilevel converter (A-MMC) based HVDC system

Kartik V. Iyer, Ashish Kumar Sahoo, Ned Mohan

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Scopus citations

Abstract

Over the past years, modular multilevel converters (MMC) have been widely researched as a preferred option among voltage source converters for HVDC transmission system. The converter presents modularity to generate high number of output voltage levels by simple series connection of modules, resulting in higher reliability and easy failure management/maintenance. Synthesis of near sinusoidal output voltage waveforms by multilevel operation requires pulse-width modulation at relatively lower switching frequencies, resulting in reduced switching losses. In this paper, asymmetrical submodules in the MMC based HVDC system have been investigated. Use of asymmetrical submodules with different capacitor voltages results in lesser number of semiconductor switches for the same number of output voltage levels, thus reducing the overall size of the converter system. The operating principle using different carrier based modulation schemes is discussed in detail. Modified voltage balancing algorithms based on well known sorting algorithm and PI controller have been investigated for their feasibility to asymmetrical-MMC operation. Simulations with preliminary experimental results are presented to validate the proposed converter operation.

Original language	English (US)
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	4693-4699
Number of pages	7
ISBN (Electronic)	9781467371506
DOIs	https://doi.org/10.1109/ECCE.2015.7310323
State	Published - Oct 27 2015
Event	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada Duration: Sep 20 2015 → Sep 24 2015

Publication series

Name	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

Other

Other	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/Territory	Canada
City	Montreal
Period	9/20/15 → 9/24/15

Bibliographical note

Funding Information:
The authors would like to thank ONR (Office of Naval Research), Research Grant No. - N00014-13-1-0511 for their support.

Keywords

Asymmetrical submodules
High voltage direct-current (HVDC)
Modular multilevel converter (MMC)
Pulse-width modulation
Voltage balancing algorithm

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/ECCE.2015.7310323

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Iyer, K. V., Sahoo, A. K., & Mohan, N. (2015). Asymmetrical modular mutilevel converter (A-MMC) based HVDC system. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 (pp. 4693-4699). Article 7310323 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7310323

Asymmetrical modular mutilevel converter (A-MMC) based HVDC system. / Iyer, Kartik V.; Sahoo, Ashish Kumar; Mohan, Ned.
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 4693-4699 7310323 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Iyer, KV, Sahoo, AK & Mohan, N 2015, Asymmetrical modular mutilevel converter (A-MMC) based HVDC system. in 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015., 7310323, 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, Institute of Electrical and Electronics Engineers Inc., pp. 4693-4699, 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, Montreal, Canada, 9/20/15. https://doi.org/10.1109/ECCE.2015.7310323

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AB - Over the past years, modular multilevel converters (MMC) have been widely researched as a preferred option among voltage source converters for HVDC transmission system. The converter presents modularity to generate high number of output voltage levels by simple series connection of modules, resulting in higher reliability and easy failure management/maintenance. Synthesis of near sinusoidal output voltage waveforms by multilevel operation requires pulse-width modulation at relatively lower switching frequencies, resulting in reduced switching losses. In this paper, asymmetrical submodules in the MMC based HVDC system have been investigated. Use of asymmetrical submodules with different capacitor voltages results in lesser number of semiconductor switches for the same number of output voltage levels, thus reducing the overall size of the converter system. The operating principle using different carrier based modulation schemes is discussed in detail. Modified voltage balancing algorithms based on well known sorting algorithm and PI controller have been investigated for their feasibility to asymmetrical-MMC operation. Simulations with preliminary experimental results are presented to validate the proposed converter operation.

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Asymmetrical modular mutilevel converter (A-MMC) based HVDC system

Abstract

Publication series

Other

Bibliographical note

Keywords

UN SDGs

Access

OpenUrl availability

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Cite this