A multi-port current-limiting hybrid DC crcuit breaker

Xu, Jianzhong, Song, Bingqian, Lü, Yu, Zhao, Chengyong, Li, Gen and Liang, Jun 2020. A multi-port current-limiting hybrid DC crcuit 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:	28 July 2020
Date of Acceptance:	27 July 2020
Last Modified:	07 Dec 2020 18:07
URI:	http://orca.cf.ac.uk/id/eprint/133832

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