High-Speed Differential Protection for Smart DC Distribution Systems

被引:239
作者
Fletcher, Steven D. A. [1 ]
Norman, Patrick J. [1 ]
Fong, Kenny [1 ]
Galloway, Stuart J. [1 ]
Burt, Graeme M. [1 ]
机构
[1] Univ Strathclyde, Inst Energy & Environm, Dept Elect & Elect Engn, Glasgow G1 1XW, Lanark, Scotland
关键词
Fault currents; dc power systems; microgrid; power system protection; CONTROL STRATEGY; SHORT-CIRCUIT;
D O I
10.1109/TSG.2014.2306064
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents a high speed current differential implementation approach for smart dc distribution systems capable of sub-millisecond fault detection. The approach utilizes the natural characteristics of dc differential current measurements to significantly reduce fault detection times compared to standard applications and hence meet requirements for dc converter protection (around 2 ms). Analysis is first developed to help quantify protection implementation challenges for a given dc system. Options for implementing the proposed technique are then illustrated. Results of scaled hardware testing are presented which validate the overall protection operating times in a low voltage environment. These results show the implementation approach can consistently achieve protection system operating within the order of a few microseconds.
引用
收藏
页码:2610 / 2617
页数:8
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