A novel flexible fault current limiter for DC distribution applications

IF 4.2 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-06-21 DOI:10.1016/j.epsr.2025.111919

Feng Zheng , Fan Yang , Baojin Liu , Hao Zhong , Yuncong Huang , Ning Liang

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引用次数: 0

Abstract

This paper proposes a novel fault current limiter(NFCL) topology tailored for DC distribution systems, aiming to improve fault response speed, system protection coordination, and recovery capability. The NFCL integrates a fast-acting solid-state switching path and an energy-absorbing branch, forming a coordinated fault control mechanism that enables both transient ride-through and permanent fault isolation. A hybrid protection strategy, combining voltage-differential detection and directional overcurrent identification, ensures selective response and enhances protection flexibility. Compared with conventional limiter topologies, the proposed NFCL achieves over 85 % reduction in peak fault current within 0.6 ms, significantly alleviating stress on DC circuit breakers. Experimental tests based on a 10 kV prototype confirm the NFCL's fast dynamic performance and practical applicability. These results demonstrate that the proposed NFCL offers a technically innovative and cost-effective approach to enhancing the reliability and resilience of future DC distribution networks.

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一种用于直流配电的新型柔性故障限流器

本文提出了一种适用于直流配电系统的新型故障限流器拓扑结构，旨在提高故障响应速度、系统保护协调能力和恢复能力。NFCL集成了快速的固态开关路径和吸能分支，形成了一个协调的故障控制机制，既可以实现瞬时穿越，也可以实现永久故障隔离。结合电压差检测和定向过流识别的混合保护策略，确保了选择性响应，增强了保护的灵活性。与传统的限流器拓扑结构相比，所提出的NFCL在0.6 ms内实现了85%以上的峰值故障电流降低，显著减轻了直流断路器的压力。基于10kv样机的试验验证了NFCL的快速动态性能和实际适用性。这些结果表明，NFCL为提高未来直流配电网的可靠性和弹性提供了一种技术创新和经济有效的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.