Seamless Transition Control for Modular Multilevel Converters When Inserting a Cold-Reserve Redundant Submodule

Binbin Li; Yi Zhang; Rongfeng Yang; Rong Xu; Dianguo Xu; Wei Wang

doi:10.1109/TPEL.2015.2392778

Seamless Transition Control for Modular Multilevel Converters When Inserting a Cold-Reserve Redundant Submodule

Binbin Li, Yi Zhang, Rongfeng Yang, Rong Xu, Dianguo Xu, Wei Wang

Research output: Contribution to journal › Letter › peer-review

105 Citations (Scopus)

Abstract

Redundant submodules (SMs) are always required to ensure the reliability of the modular multilevel converter (MMC). In this letter, a new control method for MMC is proposed to seamlessly ride through the period when bypassing a faulty SM and inserting a redundant SM. With the proposed method, the redundant SMs can be arranged in cold reserve mode so as to reduce the conduction losses, and when faced with SM failures, bypass of the faulty SM and insertion of the redundant SM will incur no inrush current problems. Besides, the capacitor of the newly inserted SM can get linearly charged. Validity of the proposed control method is verified experimentally based on a single-phase MMC prototype.

Original language	English
Article number	7010946
Journal	IEEE Transactions on Power Electronics
Volume	30
Issue number	8
Pages (from-to)	4052-4057
Number of pages	6
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2015.2392778
Publication status	Published - Aug 2015

Bibliographical note

Publisher Copyright:
© 1986-2012 IEEE.

Keywords

Cold reserve
modular multilevel converter (MMC)
redundancy
seamless transition
submodule (SM)

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title = "Seamless Transition Control for Modular Multilevel Converters When Inserting a Cold-Reserve Redundant Submodule",

abstract = "Redundant submodules (SMs) are always required to ensure the reliability of the modular multilevel converter (MMC). In this letter, a new control method for MMC is proposed to seamlessly ride through the period when bypassing a faulty SM and inserting a redundant SM. With the proposed method, the redundant SMs can be arranged in cold reserve mode so as to reduce the conduction losses, and when faced with SM failures, bypass of the faulty SM and insertion of the redundant SM will incur no inrush current problems. Besides, the capacitor of the newly inserted SM can get linearly charged. Validity of the proposed control method is verified experimentally based on a single-phase MMC prototype.",

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AU - Zhang, Yi

AU - Yang, Rongfeng

AU - Xu, Rong

AU - Xu, Dianguo

AU - Wang, Wei

PY - 2015/8

Y1 - 2015/8

N2 - Redundant submodules (SMs) are always required to ensure the reliability of the modular multilevel converter (MMC). In this letter, a new control method for MMC is proposed to seamlessly ride through the period when bypassing a faulty SM and inserting a redundant SM. With the proposed method, the redundant SMs can be arranged in cold reserve mode so as to reduce the conduction losses, and when faced with SM failures, bypass of the faulty SM and insertion of the redundant SM will incur no inrush current problems. Besides, the capacitor of the newly inserted SM can get linearly charged. Validity of the proposed control method is verified experimentally based on a single-phase MMC prototype.

AB - Redundant submodules (SMs) are always required to ensure the reliability of the modular multilevel converter (MMC). In this letter, a new control method for MMC is proposed to seamlessly ride through the period when bypassing a faulty SM and inserting a redundant SM. With the proposed method, the redundant SMs can be arranged in cold reserve mode so as to reduce the conduction losses, and when faced with SM failures, bypass of the faulty SM and insertion of the redundant SM will incur no inrush current problems. Besides, the capacitor of the newly inserted SM can get linearly charged. Validity of the proposed control method is verified experimentally based on a single-phase MMC prototype.

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Seamless Transition Control for Modular Multilevel Converters When Inserting a Cold-Reserve Redundant Submodule

Abstract

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Keywords

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