直流配电网故障识别和定位技术研究综述
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摘要
直流配电网的保护技术尚处于起步阶段,缺乏实际经验和相关标准,本文试图对直流配电网故障识别和定位技术的研究现状做一个较为全面的介绍,并探讨未来进一步的研究方向。首先概述了直流配电网的拓扑结构、接地方式、保护设备、故障类型和故障暂态特征等与保护方案设计紧密相关的内容。其次,对直流配电网的故障识别技术进行了总结归纳,分析了各类型方法主要的原理和优缺点,并对交流和直流配电网不同故障识别方法的特点进行了对比。最后,对现有的直流配电网故障定位方法进行了分类,说明了各种定位方法的基本原理,分析了各故障定位方法存在的不足和可能的改进方案。
As one of the key technologies and bottlenecks for development and application of DC distribution network, the protection technology is still in its infancy, lack of practical experience and standards. This paper first overviews the topology structure, grounding mode, fault type and transient characteristics of the DC distribution network, which are closely related to the protection scheme design. Then, the fault identification technology of DC distribution network is summarized, and the main principles and characteristics of each type of method are analyzed. It is considered that with the development of smart distribution network, the communication-based protection technology has certain advantages. Finally, the existing fault location methods of DC distribution network are classified, and the basic principles of various location methods are illustrated. In addition, this paper summarizes the shortcomings of various fault location methods and gives possible improvements.
As one of the key technologies and bottlenecks for development and application of DC distribution network, the protection technology is still in its infancy, lack of practical experience and standards. This paper first overviews the topology structure, grounding mode, fault type and transient characteristics of the DC distribution network, which are closely related to the protection scheme design. Then, the fault identification technology of DC distribution network is summarized, and the main principles and characteristics of each type of method are analyzed. It is considered that with the development of smart distribution network, the communication-based protection technology has certain advantages. Finally, the existing fault location methods of DC distribution network are classified, and the basic principles of various location methods are illustrated. In addition, this paper summarizes the shortcomings of various fault location methods and gives possible improvements.
引文
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[9] 薛士敏,齐金龙,刘冲(Xue Shimin,Qi Jinlong,Liu Chong).直流微网保护综述(A research review of protection for DC microgrid)[J].中国电机工程学报(Proceedings of the CSEE),2016,36(13):3404-3412.
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[13] 肖立业,林良真,徐铭铭,等(Xiao Liye,Lin Liangzhen,Xu Mingming,et al.).未来电网—多层次直流环形电网与“云电力”(Future power grid - Multiple-level DC lop grid and “cloud powering”)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2011,30(4):64-69.
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[17] 戴志辉,葛红波,严思齐,等(Dai Zhihui,Ge Hongbo,Yan Siqi,et al.).柔性直流配电网接地方式对故障特性的影响分析(Effects of grounding mode on fault characteristics in flexible DC distribution system)[J].电网技术(Power System Technology),2017,41(7):2353-2362.
[18] Li B,He J W.Studies on the application of R-SFCL in the VSC-based DC distribution system[J].IEEE Transactions on Applied Superconductivity,2016,26(3):5601005.
[19] 陈超,刘文君,俞天毅,等(Chen Chao,Liu Wenjun,Yu Tianyi,et al.).基于直流系统故障保护的三端口直流断路器拓扑研究(Topology research of three-port solid state circuit breaker based on DC system fault protection)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2018,37(6):58-64.
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[22] 李斌,何佳伟(Li Bin,He Jiawei).柔性直流配电系统故障分析及限流方法(Research on the DC fault isolating technique in multi-terminal DC system)[J].中国电机工程学报(Proceedings of the CSEE),2015,35(12):3026-3036.
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