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A multi-port current-limiting hybrid DC circuit breaker

Xu, Jianzhong, Song, Bingqian, Lv, Yu, Zhao, Chengyong, Liang, Jun and Li, Gen 2020. A multi-port current-limiting hybrid DC circuit breaker. IEEE Transactions on Power Delivery 10.1109/TPWRD.2020.3013014

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Abstract

Recently the hybrid multi-port DC circuit breaker (MP-DCCB) is becoming popular in protecting HVDC grids, thanks to their re-duction of power electronics devices. In this paper, an enhanced multi-port current-limiting DCCB (MP-CLCB) for multiple line protection is proposed. The integrated fault current limiter (FCL) inside the MP-CLCB can clear the fault faster with slightly in-creased costs. To reduce the energy dissipation requirement for the surge arresters caused by the newly added current-limiting path, an energy transfer path which provides a loop with the in-ductors during the current decay stage is designed. The theoreti-cal analysis of the pre-charging, current-limiting, fault interrup-tion and energy dissipation of the MP-CLCB is carried out. Moreover, the design principles of the energy dissipation and the key parameters of the MP-CLCB are provided. The proposed approaches are verified through simulations in PSCAD/EMTDC. The results show that the MP-CLCB can replace multiple DCCBs, accelerate the fault current interruption and reduce the energy dissipation requirement for the surge arresters.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0885-8977
Date of First Compliant Deposit: 6 October 2020
Last Modified: 27 Nov 2020 15:46
URI: http://orca.cf.ac.uk/id/eprint/135138

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