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A low-loss integrated circuit breaker for HVDC applications

Wang, Sheng, Ming, Wenlong, Ugalde Loo, Carlos and Liang, Jun 2021. A low-loss integrated circuit breaker for HVDC applications. IEEE Transactions on Power Delivery 10.1109/TPWRD.2021.3063515

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Abstract

Hybrid dc circuit breakers (HCBs) are recognized as suitable devices for protecting high-voltage direct-current (HVDC) systems, along with other dc circuit breakers (DCCB). However, compared to mechanical circuit breakers, HCBs exhibit higher conduction losses. Such losses are inevitable under no-fault conditions as current may flow through some of the semiconductor switches. An integrated circuit breaker (ICB) minimizing these losses is presented in this paper, and this is achieved by replacing semiconductor switches by mechanical components in the current path. For completeness, the topology design, operating sequence and a mathematical analysis for component sizing of the device are provided. In addition, an estimation of the conduction losses is quantified. It is estimated that the power losses of an ICB are 2 to 30% of an HCB only. The ICB has been implemented in PSCAD/EMTDC to demonstrate its effectiveness for isolating dc faults, with simulations conducted on a three-terminal HVDC grid.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Engineering
Additional Information: "© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works."
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0885-8977
Date of First Compliant Deposit: 1 March 2021
Date of Acceptance: 22 February 2021
Last Modified: 09 Mar 2021 11:35
URI: http://orca.cardiff.ac.uk/id/eprint/138756

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