A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions

Pengfei Hu; Rui Yin; Remus Teodorescu; Songda Wang; Josep M. Guerrero

doi:10.1109/IECON.2018.8591364

A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions

Pengfei Hu, Rui Yin, Remus Teodorescu, Songda Wang, Josep M. Guerrero

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

3 Citations (Scopus)

Abstract

A hybrid modular multilevel converter (MMC), consisting of full-bridge sub-modules (FBSMs) and half-bridge sub-modules (HBSMs), is an efficient and DC-fault tolerant topology, which can be used in overhead-line HVDC transmission application. Additionally, it can work under over-modulation condition (i.e., arm submodule clusters may generate negative voltage during a fundamental cycle) to improve the utilization of submodules (SMs). Regarding the over-modulation issue, this paper proposes a reduced-switching-frequency modulation method, considering the different dynamics of FBSMs and HBSMs, for hybrid MMCs. Moreover, an improved wave-distributing approach which can reduce losses and make the operating time and losses of the two types of SMs more even than the conventional method is presented. Finally, the effectiveness of the proposed method is verified by an over-modulation hybrid MMC simulation model built based on PSCAD/EMTDC platform.

Original language	English
Title of host publication	Proceedings of the IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
Number of pages	6
Publisher	IEEE Press
Publication date	Oct 2018
Pages	3903-3908
Article number	8591364
ISBN (Print)	978-1-5090-6685-8
ISBN (Electronic)	978-1-5090-6684-1
DOIs	https://doi.org/10.1109/IECON.2018.8591364
Publication status	Published - Oct 2018
Event	44th Annual Conference of the IEEE Industrial Electronics Society - Omni Shoreham Hotel, Washington, United States Duration: 21 Oct 2018 → 23 Oct 2018 http://www.iecon2018.org/

Conference

Conference	44th Annual Conference of the IEEE Industrial Electronics Society
Location	Omni Shoreham Hotel
Country/Territory	United States
City	Washington
Period	21/10/2018 → 23/10/2018
Internet address	http://www.iecon2018.org/

Series	Proceedings of the Annual Conference of the IEEE Industrial Electronics Society
ISSN	1553-572X

Keywords

Hybrid MMC
Nearest level modulation
Over-modulation condition
Reduced switching frequency

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10.1109/IECON.2018.8591364

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Cite this

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title = "A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions",

abstract = "A hybrid modular multilevel converter (MMC), consisting of full-bridge sub-modules (FBSMs) and half-bridge sub-modules (HBSMs), is an efficient and DC-fault tolerant topology, which can be used in overhead-line HVDC transmission application. Additionally, it can work under over-modulation condition (i.e., arm submodule clusters may generate negative voltage during a fundamental cycle) to improve the utilization of submodules (SMs). Regarding the over-modulation issue, this paper proposes a reduced-switching-frequency modulation method, considering the different dynamics of FBSMs and HBSMs, for hybrid MMCs. Moreover, an improved wave-distributing approach which can reduce losses and make the operating time and losses of the two types of SMs more even than the conventional method is presented. Finally, the effectiveness of the proposed method is verified by an over-modulation hybrid MMC simulation model built based on PSCAD/EMTDC platform.",

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Hu, P, Yin, R, Teodorescu, R, Wang, S & Guerrero, JM 2018, A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions. in Proceedings of the IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society., 8591364, IEEE Press, Proceedings of the Annual Conference of the IEEE Industrial Electronics Society, pp. 3903-3908, 44th Annual Conference of the IEEE Industrial Electronics Society, Washington, District of Columbia, United States, 21/10/2018. https://doi.org/10.1109/IECON.2018.8591364

A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions. / Hu, Pengfei; Yin, Rui; Teodorescu, Remus et al.
Proceedings of the IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE Press, 2018. p. 3903-3908 8591364 (Proceedings of the Annual Conference of the IEEE Industrial Electronics Society).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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AU - Hu, Pengfei

AU - Yin, Rui

AU - Teodorescu, Remus

AU - Wang, Songda

AU - Guerrero, Josep M.

PY - 2018/10

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N2 - A hybrid modular multilevel converter (MMC), consisting of full-bridge sub-modules (FBSMs) and half-bridge sub-modules (HBSMs), is an efficient and DC-fault tolerant topology, which can be used in overhead-line HVDC transmission application. Additionally, it can work under over-modulation condition (i.e., arm submodule clusters may generate negative voltage during a fundamental cycle) to improve the utilization of submodules (SMs). Regarding the over-modulation issue, this paper proposes a reduced-switching-frequency modulation method, considering the different dynamics of FBSMs and HBSMs, for hybrid MMCs. Moreover, an improved wave-distributing approach which can reduce losses and make the operating time and losses of the two types of SMs more even than the conventional method is presented. Finally, the effectiveness of the proposed method is verified by an over-modulation hybrid MMC simulation model built based on PSCAD/EMTDC platform.

AB - A hybrid modular multilevel converter (MMC), consisting of full-bridge sub-modules (FBSMs) and half-bridge sub-modules (HBSMs), is an efficient and DC-fault tolerant topology, which can be used in overhead-line HVDC transmission application. Additionally, it can work under over-modulation condition (i.e., arm submodule clusters may generate negative voltage during a fundamental cycle) to improve the utilization of submodules (SMs). Regarding the over-modulation issue, this paper proposes a reduced-switching-frequency modulation method, considering the different dynamics of FBSMs and HBSMs, for hybrid MMCs. Moreover, an improved wave-distributing approach which can reduce losses and make the operating time and losses of the two types of SMs more even than the conventional method is presented. Finally, the effectiveness of the proposed method is verified by an over-modulation hybrid MMC simulation model built based on PSCAD/EMTDC platform.

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Hu P, Yin R, Teodorescu R, Wang S, Guerrero JM. A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions. In Proceedings of the IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE Press. 2018. p. 3903-3908. 8591364. (Proceedings of the Annual Conference of the IEEE Industrial Electronics Society). doi: 10.1109/IECON.2018.8591364

A reduced-switching-frequency modulation method for hybrid MMCs under over-modulation conditions

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Keywords

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Advanced Control Strategies for Modular Multilevel Converters

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