Coordination of mechanical DCCBs and temporary blocking of half bridge MMC

M. Zaja; D. Jovcic

Coordination of mechanical DCCBs and temporary blocking of half bridge MMC

M. Zaja, D. Jovcic

Research output: Contribution to conference › Unpublished paper › peer-review

9 Citations (Scopus)

18 Downloads (Pure)

Abstract

This paper proposes a dc grid protection strategy based on temporary MMC blocking in combination with mechanical DCCBs on dc lines. MMCs are blocked for only a short period of time while DCCBs operate and resume operation afterwards. A comparison is made with a protection strategy in which MMC blocking is avoided. The study analyses the impact of dc faults on dc power flow, ac system, DCCB dimensioning and MMC's antiparallel diodes. Operation is demonstrated on a point-to-point HVDC and a three-terminal dc grid, also using thermal model of MMC's IGBT module. Main benefits of the proposed strategy are simplicity and low protection system cost. On the downside, antiparallel diodes are exposed to greater current and thermal stress.

Original language	English
Number of pages	6
Publication status	Published - 7 Feb 2019
Event	15th IET International Conference on AC and DC Power Transmission, ACDC 2019 - Coventry, United Kingdom Duration: 5 Feb 2019 → 7 Feb 2019

Conference

Conference	15th IET International Conference on AC and DC Power Transmission, ACDC 2019
Country/Territory	United Kingdom
City	Coventry
Period	5/02/19 → 7/02/19

Keywords

Dc grid protection
DCCB
HVDC
MMC

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Coordination of mechanical DCCBs and temporary blocking of half bridge MMCFinal published version, 580 KBLicence: Unspecified

Cite this

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title = "Coordination of mechanical DCCBs and temporary blocking of half bridge MMC",

abstract = "This paper proposes a dc grid protection strategy based on temporary MMC blocking in combination with mechanical DCCBs on dc lines. MMCs are blocked for only a short period of time while DCCBs operate and resume operation afterwards. A comparison is made with a protection strategy in which MMC blocking is avoided. The study analyses the impact of dc faults on dc power flow, ac system, DCCB dimensioning and MMC's antiparallel diodes. Operation is demonstrated on a point-to-point HVDC and a three-terminal dc grid, also using thermal model of MMC's IGBT module. Main benefits of the proposed strategy are simplicity and low protection system cost. On the downside, antiparallel diodes are exposed to greater current and thermal stress.",

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author = "M. Zaja and D. Jovcic",

year = "2019",

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note = "15th IET International Conference on AC and DC Power Transmission, ACDC 2019 ; Conference date: 05-02-2019 Through 07-02-2019",

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TY - CONF

T1 - Coordination of mechanical DCCBs and temporary blocking of half bridge MMC

AU - Zaja, M.

AU - Jovcic, D.

PY - 2019/2/7

Y1 - 2019/2/7

N2 - This paper proposes a dc grid protection strategy based on temporary MMC blocking in combination with mechanical DCCBs on dc lines. MMCs are blocked for only a short period of time while DCCBs operate and resume operation afterwards. A comparison is made with a protection strategy in which MMC blocking is avoided. The study analyses the impact of dc faults on dc power flow, ac system, DCCB dimensioning and MMC's antiparallel diodes. Operation is demonstrated on a point-to-point HVDC and a three-terminal dc grid, also using thermal model of MMC's IGBT module. Main benefits of the proposed strategy are simplicity and low protection system cost. On the downside, antiparallel diodes are exposed to greater current and thermal stress.

AB - This paper proposes a dc grid protection strategy based on temporary MMC blocking in combination with mechanical DCCBs on dc lines. MMCs are blocked for only a short period of time while DCCBs operate and resume operation afterwards. A comparison is made with a protection strategy in which MMC blocking is avoided. The study analyses the impact of dc faults on dc power flow, ac system, DCCB dimensioning and MMC's antiparallel diodes. Operation is demonstrated on a point-to-point HVDC and a three-terminal dc grid, also using thermal model of MMC's IGBT module. Main benefits of the proposed strategy are simplicity and low protection system cost. On the downside, antiparallel diodes are exposed to greater current and thermal stress.

KW - Dc grid protection

KW - DCCB

KW - HVDC

KW - MMC

UR - http://www.scopus.com/inward/record.url?scp=85063870670&partnerID=8YFLogxK

M3 - Unpublished paper

AN - SCOPUS:85063870670

T2 - 15th IET International Conference on AC and DC Power Transmission, ACDC 2019

Y2 - 5 February 2019 through 7 February 2019

ER -

Coordination of mechanical DCCBs and temporary blocking of half bridge MMC

Abstract

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Keywords

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