AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter

Ang Li; Lei Lin; Chen Xu; Jiabing Hu

doi:10.1109/APEC.2018.8341546

AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter

Ang Li, Lei Lin, Chen Xu, Jiabing Hu

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

13 Citations (Scopus)

Abstract

The hybrid modular multilevel converter (MMC) composed of half-bridge submodules (HBSMs) and full-bridge submodules (FBSMs) is considered as a promising topology to deal with dc fault in high-voltage direct-current (HVDC) transmission systems. Compared with conventional HB-MMC, start-up process in hybrid MMC is different due to SMs topology difference. For ac-side start-up, the voltages of HBSM capacitors and FBSM capacitors are unbalanced after uncontrolled pre-charge process. For dc-side start-up, applying current-limiting resistor to restrict the inrush current can be costly. Aiming to charge the SMs capacitors to rated value smoothly, start-up strategies are proposed in this paper. The proposed ac start-up method can eliminate the unbalance voltage during closed loop pre-charge control stage. The dc start-up method without current-limiting resistor is proposed by regulating dc-link voltage. Simulation in PSCAD/EMTDC is implemented to verify the feasibility and validity of the proposed start-up strategies.

Original language	English
Title of host publication	APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
Pages	3121-3126
Number of pages	6
ISBN (Electronic)	9781538611807
DOIs	https://doi.org/10.1109/APEC.2018.8341546
Publication status	Published - 18 Apr 2018
Externally published	Yes
Event	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 Conference number: 33

Conference

Conference	33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Abbreviated title	APEC 2018
Country/Territory	United States
City	San Antonio
Period	4/03/18 → 8/03/18

Keywords

Closed loop Pre-charge Control
Hybrid
Modular Multilevel Converter

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10.1109/APEC.2018.8341546

Cite this

@inproceedings{110ae90e7b7e4cdebde785e5ce9eeb3e,

title = "AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter",

abstract = "The hybrid modular multilevel converter (MMC) composed of half-bridge submodules (HBSMs) and full-bridge submodules (FBSMs) is considered as a promising topology to deal with dc fault in high-voltage direct-current (HVDC) transmission systems. Compared with conventional HB-MMC, start-up process in hybrid MMC is different due to SMs topology difference. For ac-side start-up, the voltages of HBSM capacitors and FBSM capacitors are unbalanced after uncontrolled pre-charge process. For dc-side start-up, applying current-limiting resistor to restrict the inrush current can be costly. Aiming to charge the SMs capacitors to rated value smoothly, start-up strategies are proposed in this paper. The proposed ac start-up method can eliminate the unbalance voltage during closed loop pre-charge control stage. The dc start-up method without current-limiting resistor is proposed by regulating dc-link voltage. Simulation in PSCAD/EMTDC is implemented to verify the feasibility and validity of the proposed start-up strategies.",

keywords = "Closed loop Pre-charge Control, Hybrid, Modular Multilevel Converter",

author = "Ang Li and Lei Lin and Chen Xu and Jiabing Hu",

year = "2018",

month = apr,

day = "18",

doi = "10.1109/APEC.2018.8341546",

language = "English",

pages = "3121--3126",

booktitle = "APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition",

note = "33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018, APEC 2018 ; Conference date: 04-03-2018 Through 08-03-2018",

}

Li, A, Lin, L, Xu, C & Hu, J 2018, AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter. in APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition. pp. 3121-3126, 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018, San Antonio, Texas, United States, 4/03/18. https://doi.org/10.1109/APEC.2018.8341546

TY - GEN

T1 - AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter

AU - Li, Ang

AU - Lin, Lei

AU - Xu, Chen

AU - Hu, Jiabing

N1 - Conference code: 33

PY - 2018/4/18

Y1 - 2018/4/18

N2 - The hybrid modular multilevel converter (MMC) composed of half-bridge submodules (HBSMs) and full-bridge submodules (FBSMs) is considered as a promising topology to deal with dc fault in high-voltage direct-current (HVDC) transmission systems. Compared with conventional HB-MMC, start-up process in hybrid MMC is different due to SMs topology difference. For ac-side start-up, the voltages of HBSM capacitors and FBSM capacitors are unbalanced after uncontrolled pre-charge process. For dc-side start-up, applying current-limiting resistor to restrict the inrush current can be costly. Aiming to charge the SMs capacitors to rated value smoothly, start-up strategies are proposed in this paper. The proposed ac start-up method can eliminate the unbalance voltage during closed loop pre-charge control stage. The dc start-up method without current-limiting resistor is proposed by regulating dc-link voltage. Simulation in PSCAD/EMTDC is implemented to verify the feasibility and validity of the proposed start-up strategies.

AB - The hybrid modular multilevel converter (MMC) composed of half-bridge submodules (HBSMs) and full-bridge submodules (FBSMs) is considered as a promising topology to deal with dc fault in high-voltage direct-current (HVDC) transmission systems. Compared with conventional HB-MMC, start-up process in hybrid MMC is different due to SMs topology difference. For ac-side start-up, the voltages of HBSM capacitors and FBSM capacitors are unbalanced after uncontrolled pre-charge process. For dc-side start-up, applying current-limiting resistor to restrict the inrush current can be costly. Aiming to charge the SMs capacitors to rated value smoothly, start-up strategies are proposed in this paper. The proposed ac start-up method can eliminate the unbalance voltage during closed loop pre-charge control stage. The dc start-up method without current-limiting resistor is proposed by regulating dc-link voltage. Simulation in PSCAD/EMTDC is implemented to verify the feasibility and validity of the proposed start-up strategies.

KW - Closed loop Pre-charge Control

KW - Hybrid

KW - Modular Multilevel Converter

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DO - 10.1109/APEC.2018.8341546

M3 - Conference contribution

SP - 3121

EP - 3126

BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition

T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018

Y2 - 4 March 2018 through 8 March 2018

ER -

AC- and DC-Side Start-Up Strategies for Half-/Full-Bridge Hybrid Modular Multilevel Converter

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Keywords

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