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Operation and control of an HVDC circuit breaker with current flow control capability

Liu, Wei, Li, Chuanyue ORCID:, Ugalde Loo, Carlos ORCID:, Wang, Sheng ORCID:, Li, Gen ORCID: and Liang, Jun ORCID: 2021. Operation and control of an HVDC circuit breaker with current flow control capability. IEEE Journal of Emerging and Selected Topics in Power Electronics 9 (4) , pp. 4447-4458. 10.1109/JESTPE.2020.3005894

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Deployment of dc circuit breakers (DCCBs) will help to isolate dc faults in dc systems. Conversely, current flow controllers (CFCs) will be employed in dc grids to balance currents among transmission lines. However, the inclusion of these devices may incur significant capital investment. A way to reduce costs is by integrating current control capabilities into DCCBs. This paper presents a new device, the CB/CFC, which combines a multi-line DCCB with a half-bridge based CFC. The operating principles of the device are analyzed and its operating modes are classified. A level-shift modulation method ensuring that a single bridge of the CB/CFC is modulated for each operating mode is considered. This simplifies the control scheme for CFC operation. For completeness, the CB/CFC is compared with other alternatives available in the literature. It is shown that the presented device reduces the number of semiconductor components compared to other solutions. DC fault isolation and current flow control are verified through simulations conducted in PSCAD.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: IEEE
ISSN: 2168-6777
Funders: European Commission, Horizon 2020, MSCA
Date of First Compliant Deposit: 29 June 2020
Date of Acceptance: 22 June 2020
Last Modified: 01 Dec 2023 16:33

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