Collaborative Protection Strategy for DC Multi-microgrid Based on Power Gradient Considering Communication Failures

被引：0
|
作者：
Zhang W. [1 ]
Zhang H. [1 ,2 ]
Zhi N. [1 ]
Wang H. [1 ]
Zeng C. [1 ]
机构：
[1] School of Electrical Engineering, Xi’an University of Technology, Xi’an
[2] State Key Laboratory of Safety Control and Simulation of Power System and Power Generation Equipment, Tsinghua University, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 11期
基金：
中国国家自然科学基金;
关键词：
current differential protection; DC multi-microgrid; fault detection; power gradient protection; sensitivity;
D O I：
10.13336/j.1003-6520.hve.20211352
中图分类号：
学科分类号：
摘要：
Compared with single DC microgrid, DC multi-microgrid improves the power supply efficiency, however, its complex topology increases the difficulty of fault detection. At the same time, the communication failure or data loss of DC multi-microgrid reduces the reliability of protection, and even leads to protection failure. In order to solve the problem of protection failure caused by communication faults and improve the protection reliability, a cooperative protection strategy based on power gradient considering communication faults is proposed. When the communication is normal, the remote power gradient differential protection can quickly and selectively remove the short-circuit faults; In case of communication failure, the power gradient differential protection is locked and the local power gradient protection is started. The two kinds of protections act together, which has the advantages of unit protection and non-unit protection without adding measuring devices. Compared with overcurrent or current differential protection, the cooperative protection strategy has faster fault detection speed and higher sensitivity, and is not affected by communication faults. Finally, simulation results show the effectiveness of the proposed strategy. © 2022 Science Press. All rights reserved.
引用
收藏
页码：4590 / 4599
页数：9
相关论文
共 26 条
  • [1] MENG L X, SHAFIEE Q, TRECATE G F, Et al., Review on control of DC microgrids and multiple microgrid clusters, IEEE Journal of Emerging and Selected Topics in Power Electronics, 5, 3, pp. 928-948, (2017)
  • [2] LIU Haitao, XIONG Xiong, JI Yu, Et al., Cluster control research of multi-microgrids system under DC distribution system, Proceedings of the CSEE, 39, 24, pp. 7159-7167, (2019)
  • [3] DRAGICEVIC T, LU X N, VASQUEZ J C, Et al., DC microgrids—part I: a review of control strategies and stabilization techniques, IEEE Transactions on Power Electronics, 31, 7, pp. 4876-4891, (2016)
  • [4] LI Bin, HE Jiawei, FENG Yadong, Et al., Key techniques for protection of multi-terminal flexible DC grid, Automation of Electric Power Systems, 40, 21, pp. 2-12, (2016)
  • [5] LI Xialin, GUO Li, WANG Chengshan, Et al., Key technologies of DC microgrids: an overview, Proceedings of the CSEE, 36, 1, pp. 2-17, (2016)
  • [6] XIONG Qing, CHEN Weijiang, JI Shengchang, Et al., Review of research progress on characteristics, detection and localization approaches of fault arc in low voltage DC system, Proceedings of the CSEE, 40, 18, pp. 6015-6026, (2020)
  • [7] BEHESHTAEIN S, CUZNER R, SAVAGHEBI M, Et al., Review on microgrids protection, IET Generation, Transmission & Distribution, 13, 6, pp. 743-759, (2019)
  • [8] LIU Luhui, YE Zhihao, FU Lijun, Et al., Research & development status and prospects of fast DC circuit breakers, Proceedings of the CSEE, 37, 4, pp. 966-977, (2017)
  • [9] 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)
  • [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)
123