An improved modular multilevel converter with DC fault blocking capability

Rong Zeng; Lie Xu; Liangzhong Yao

doi:10.1109/PESGM.2014.6938937

An improved modular multilevel converter with DC fault blocking capability

Rong Zeng, Lie Xu, Liangzhong Yao

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper › peer-review

43 Citations (Scopus)

Abstract

In contrast to the conventional half-bridge based MMC (HB-MMC), the full-bridge based MMC (FB-MMC) has the advantage of dc fault blocking capacity, but at the costs of increased power semiconductor devices and power losses. This paper proposes a hybrid modular multilevel converters (MMC) comprising of half half-bridge and half full-bridge sub-modules. The proposed topology takes the advantages of dc fault blocking capability of FB-MMC with less semiconductor devices and lower power losses than the FB-MMC. Comparative studies on power losses for different circuit configuration are conducted. Detailed pre-charge scheme for the proposed Hybrid MMC are designed and verified by simulations. Experiment results are provided to demonstrate the feasibility and validity of the proposed Hybrid MMC under normal operation and dc fault condition.

Original language	English
Number of pages	5
DOIs	https://doi.org/10.1109/PESGM.2014.6938937
Publication status	Published - Jul 2014
Event	IEEE PES General Meeting 2014 - Washington DC, United States Duration: 27 Jul 2014 → …

Conference

Conference	IEEE PES General Meeting 2014
Country	United States
City	Washington DC
Period	27/07/14 → …

Keywords

modular multilevel converter
power losses
circuit faults
hybrid power systems

Access to Document

10.1109/PESGM.2014.6938937

http://www.pes-gm.org/2014/

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Cite this

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abstract = "In contrast to the conventional half-bridge based MMC (HB-MMC), the full-bridge based MMC (FB-MMC) has the advantage of dc fault blocking capacity, but at the costs of increased power semiconductor devices and power losses. This paper proposes a hybrid modular multilevel converters (MMC) comprising of half half-bridge and half full-bridge sub-modules. The proposed topology takes the advantages of dc fault blocking capability of FB-MMC with less semiconductor devices and lower power losses than the FB-MMC. Comparative studies on power losses for different circuit configuration are conducted. Detailed pre-charge scheme for the proposed Hybrid MMC are designed and verified by simulations. Experiment results are provided to demonstrate the feasibility and validity of the proposed Hybrid MMC under normal operation and dc fault condition.",

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AB - In contrast to the conventional half-bridge based MMC (HB-MMC), the full-bridge based MMC (FB-MMC) has the advantage of dc fault blocking capacity, but at the costs of increased power semiconductor devices and power losses. This paper proposes a hybrid modular multilevel converters (MMC) comprising of half half-bridge and half full-bridge sub-modules. The proposed topology takes the advantages of dc fault blocking capability of FB-MMC with less semiconductor devices and lower power losses than the FB-MMC. Comparative studies on power losses for different circuit configuration are conducted. Detailed pre-charge scheme for the proposed Hybrid MMC are designed and verified by simulations. Experiment results are provided to demonstrate the feasibility and validity of the proposed Hybrid MMC under normal operation and dc fault condition.

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KW - power losses

KW - circuit faults

KW - hybrid power systems

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