Fault Analysis and Protection of Ring DC Microgrid

被引：0

作者：

Zhang W. ^{[1
]}

Zhang H. ^{[1
,2
]}

Zhi N. ^{[1
]}

Wang H. ^{[1
]}

Shi H. ^{[1
]}

机构：

[1] School of Electrical Engineering, Xi'an University of Technology, Xi'an

[2] State Key Laboratory of Power System and Generation Equipment, Tsinghua University, Beijing

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Change rate of power; DC microgrid; Differential protection; Operation speed; Short-circuit impedance;

D O I：

10.7500/AEPS20200423004

中图分类号：

学科分类号：

摘要：

The rapid detection and removal of faults are the key to improving the operation reliability of DC microgrids. The current differential protection can remove the fault quickly and selectively. But it is greatly affected by the short-circuit impedance, and it may refuse to operate in the cases of the high impedance short circuit. For ring DC microgrids, a differential protection based on change rates of bus power is proposed. The power change rates of both sides of the bus are taken to formulate the differential value. The differential value of the change rates of bus power is bigger than the operation setting in the case of internal fault, and the protection will operate and remove the fault line. The differential value of the power change rates is proportional to the square of short-circuit current and short-circuit impedance. Compared with protection schemes based on current, it has faster fault identification speed and higher protection sensitivity. The simulation results show that the proposed protection scheme has better operation speed and sensitivity, and improves the reliability and stability of the ring DC microgrid. © 2020 Automation of Electric Power Systems Press.

引用

页码：105 / 110

页数：5

共 21 条

[1] Green development of electric power promotes energy revolution
[2] Innovation driven development
[3] YAN Sheng, LUO Xiang, HE Zhiyuan, Prospect of core equipment and key technology for DC power grid, Automation of Electric Power Systems, 43, 3, pp. 205-216, (2019)
[4] ZHAO Chengyong, SONG Bingqian, XU Jianzhong, Overview on typical schemes for active control of fault current in flexible DC grid, Automation of Electric Power Systems, 44, 5, pp. 3-13, (2020)
[5] XUE Shimin, QI Jinlong, LIU Chong, A research review of protection for DC microgrid, Proceedings of the CSEE, 36, 13, pp. 3404-3412, (2016)
[6] BEHESHTAEIN S, CUZNER R M, FOROUZESH M, Et al., DC microgrid protection: a comprehensive review, IEEE Journal of Emerging and Selected Topics in Power Electronics
[7] LIU Luhui, YE Zhihao, FU Lijun, Et al., Research and development status and prospects of fast DC circuit breakers, Proceedings of the CSEE, 37, 4, pp. 966-978, (2017)
[8] WANG Can, DU Chuan, XU Jiexiong, Review of topologies for medium- and high-voltage DC circuit breaker, Automation of Electric Power Systems, 44, 9, pp. 187-199, (2020)
[9] NIAN Heng, KONG Liang, Review on fault protection technologies of DC microgrid, High Voltage Engineering, 46, 7, pp. 2241-2254, (2020)
[10] BHARGAV R, BHALJA B R, GUPTA C P., Novel fault detection and localization algorithm for low-voltage DC microgrid, IEEE Transactions on Industrial Informatics, 16, 7, pp. 4498-4511, (2020)

← 1 2 3 →