Fault protection scheme for DC distribution network based on ratio of transient voltage principle

被引：0
|
作者：
Wang S. [1 ]
Fan C. [1 ]
Jiang S. [1 ]
机构：
[1] School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 07期
关键词：
Current limiting reactor; DC distribution network; DC protection; Ratio of transient voltage; Relay protection; Transition resistance;
D O I：
10.16081/j.epae.202006031
中图分类号：
学科分类号：
摘要：
Because the short circuit current of DC distribution network has the basic characteristics of rapid rising, high peak value and short process, it is difficult to identify and remove faults reliably and quickly. The reliable identification of internal and external faults is realized based on the time domain characteristics of the voltage on both sides of the current limiting reactor at the line outlet, a relay protection scheme suitable for DC distribution lines is proposed, and the fast-moving and selectivity of DC distribution line protection is realized through the combination of single-terminal electrical quantity protection and double-terminal electrical quantity protection. The proposed scheme can detect and identify faults quickly only through the ratio of transient voltage of current limiting reactor. It can not only meet the protection requirements of DC power grid, but also make the protection scheme simple and easy to implement. A large number of simulation examples verify the feasibility of the protection scheme, and it has strong ability against transition resistance. © 2020, Electric Power Automation Equipment Press. All right reserved.
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页码：196 / 203
页数：7
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