Multi-terminal Flexible DC control and protection cooperation based on fault current limiting

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-03-28 DOI:10.1016/j.epsr.2025.111650

Shimin Xue, Haoming Zhang, Baibing Liu, Junting Zhang, Wenxiang Yin, Botong Li

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引用次数: 0

Abstract

Control and protection cooperation represents a significant solution to the challenges of fault current breaking and the harsh requirements of protection rapidity faced by the flexible DC grid. Fault current-limiting control utilizing Modular Multi-level Converter (MMC) and DC circuit breaker (DCCB) has become a research hotspot, but most of the existing current-limiting strategies are relatively isolated and only applicable to two-terminal DC systems. This paper integrates the MMC with the DCCB to propose a source-network cooperative current limiting control (SNCLC) that enhances the current-limiting capability and extends the action time of protection in the multi-terminal flexible DC (MTDC) grid. The selectivity and adaptability of the SNCLC are improved through timing and parameter coordination. Then this paper utilizes the refraction and reflection coefficients to analyze the effect of SNCLC on the propagation of fault traveling waves and proposes a cooperation of control and protection based on the integration of line-mode current magnitude. The proposed cooperation is adapted to various application scenarios and is not affected by the line parameters and fault locations. Finally, PSCAD-/EMTDC-based simulations are employed to verify that the proposed scheme can identify the fault before blocking the MMC, and can withstand 300Ω transition resistance and 30 dB noise simultaneously.

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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.