Operation status monitoring for 500 kV DC circuit breaker with internal failures and relative backup fault isolation schemes

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Electric Power Systems Research Pub Date : 2024-11-10 DOI:10.1016/j.epsr.2024.111204

Weijie Wen , Zhe Zhang , Bin Li , Zhaowei Peng , Yulong Huang

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Abstract

As the primary protection and control device in direct current (DC) power systems, DC circuit breakers (DCBs) have complex structures and numerous components, making it prone to diversified internal failures. This paper explores an operation status monitoring method for DCBs, and relative backup fault isolation schemes and system recovery schemes are proposed to handle cases of DCBs with different internal failures. Contributions of this paper are: (1) An operation status monitoring method is proposed to reflect the failure degrees of DCB, categorizing the statuses of DCB into status-1 (normal), status-2 (minor failure) and status-3 (major failure). (2) According to the failure degrees of DCB, relative backup fault isolation and system recovery schemes are proposed to ensure the fault isolation scope is as small as possible and the system could recovery as fast as possible. Simulations are conducted in PSCAD/EMTDC for validation.

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500 千伏直流断路器内部故障和相对后备故障隔离方案的运行状态监测

直流断路器（DCB）作为直流电源系统中的主要保护和控制设备，结构复杂、元件繁多，容易出现多种内部故障。本文探讨了直流断路器的运行状态监测方法，并提出了相应的后备故障隔离方案和系统恢复方案，以应对直流断路器出现不同内部故障的情况。本文的贡献在于(1) 提出了反映 DCB 故障程度的运行状态监测方法，将 DCB 的状态分为状态-1（正常）、状态-2（轻微故障）和状态-3（重大故障）。(2) 根据 DCB 的故障程度，提出相对备份故障隔离和系统恢复方案，以确保故障隔离范围尽可能小，系统恢复尽可能快。在 PSCAD/EMTDC 中进行了仿真验证。

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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.