Novel Hybrid DC Circuit Breaker Based on Current Injection

被引：0

作者：

Wan C. ^{[1
]}

Pei X. ^{[1
]}

Zhou W. ^{[2
]}

Li Z. ^{[1
]}

Li P. ^{[2
]}

Zhang S. ^{[2
]}

机构：

[1] School of Electrical and Information Engineering, Changsha University of Science & Technology, Hunan Province, Changsha

[2] State Key Laboratory of Advanced Power Transmission Technology, State Grid Smart Grid Research Institute Co., Ltd.), Changping District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 12期

关键词：

current injection; hybrid DC circuit breaker; pre-charge; VSC-based DC grid;

D O I：

10.13334/j.0258-8013.pcsee.213209

中图分类号：

学科分类号：

摘要：

The hybrid DC circuit breaker is the key equipment to realize the fast interruption of fault currents and ensure the continuous and reliable operation of VSC-based DC grids to the greatest extent. At present, the hybrid DC circuit breaker based on the cascaded full-controllable power electronic modules suffers from problems of high cost, complex control and difficult to large-scale applications. To solve this problem, a novel hybrid DC circuit breaker based on current injection is proposed in this paper. The capacitor of the oscillation branch is pre-charged by the DC system, and thyristors are used to control the resonance between the capacitor and inductor in the oscillation branch for the purpose of assisting the rapid commutation of fault currents, and as a result the fast interruption of fault currents is achieved. The basic principle of LC resonant circuit is analyzed firstly. Then, operation principles of the proposed hybrid DC circuit breaker is elaborated in detail. Finally, the effectiveness and applicability of the proposed hybrid DC circuit breaker are verified with PSCAD/EMTDC software. ©2023 Chin.Soc.for Elec.Eng.

引用

页码：4727 / 4735

页数：8

共 21 条

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