Protection scheme for ring flexible DC distribution grids based on integration of current-limiting reactance voltage

被引：0
|
作者：
Dai Z. [1 ]
Liu X. [1 ]
Liu Z. [1 ]
Chen S. [1 ]
Li Y. [1 ]
Qin L. [2 ]
机构：
[1] Hebei Key Laboratory of Distributed Energy Storage and Microgrid, North China Electric Power University, Baoding
[2] State Grid Hebei Electric Power Co., Ltd., Shijiazhuang
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Complex frequency domain equivalence; Current-limiting reactance voltage; DC distribution grid; Laplace transform; Single-ended protection;
D O I：
10.16081/j.epae.202009031
中图分类号：
学科分类号：
摘要：
The traditional AC fault detection methods are not applicable for DC fault identification conside-ring the fact that DC fault current rises rapidly and has a wide influencing range. Therefore, a fast fault detection approach based on the integration of current-limiting reactance voltage for the multi-terminal DC ring network is proposed based on the complex frequency domain model of the system. Firstly, the equivalent models of each component of multi-terminal DC ring network in both time domain and complex frequency domain are analyzed in detail. Based on this, the calculation method of current-limiting reactance voltage is elaborated, by which the transformation of the system model between time domain and complex frequency domain is realized. The calculation method has the advantages of simple solution, low modeling difficulty and universality for modeling of different systems. Subsequently, a fault detection method based on the integration of current-limiting reactance voltage is proposed, which has strong anti-noise ability and a certain ability against transition resistance. Finally, the validity of the proposed calculation method and the feasibility of the protection scheme are verified via PSCAD/EMTDC based simulations. © 2020, Electric Power Automation Equipment Press. All right reserved.
引用
收藏
页码：104 / 112
页数：8
相关论文
共 20 条
  • [1] SONG Qiang, ZHAO Biao, LIU Wenhua, Et al., An overview of research on smart DC distribution power network, Procee-dings of the CSEE, 33, 25, pp. 9-19, (2013)
  • [2] YAO Liangzhong, WU Jing, WANG Zhibing, Et al., Pattern ana-lysis of future HVDC grid development, Proceedings of the CSEE, 34, 34, pp. 6007-6020, (2014)
  • [3] SUN Xu, WANG Huawei, LEI Xiao, Et al., Restriction of DC short circuit current for overhead lines of flexible DC grid, Electric Power Automation Equipment, 37, 2, pp. 219-223, (2017)
  • [4] LIN Xiangning, LIU Qi, FAN Lixiang, Et al., Blocking pilot pro-tection based on ratio of superimposed energy for VSC-MTDC grid, Electric Power Automation Equipment, 40, 4, pp. 2-8, (2020)
  • [5] ZHANG Ming, HE Jinghan, LUO Guomin, Et al., Local information-based fault location method for multi-terminal flexible DC grid, Electric Power Automation Equipment, 38, 3, pp. 155-161, (2018)
  • [6] DAI Zhihui, HUANG Min, SU Huaibo, Et al., Single-terminal quantity based line protection for ring flexible DC distribution system, Proceedings of the CSEE, 38, 23, pp. 6825-6836, (2018)
  • [7] LI Bin, HE Jiawei, LI Ye, Et al., Single-ended protection scheme based on boundary characteristic for the multi-terminal VSC-based DC distribution system, Proceedings of the CSEE, 36, 21, pp. 5741-5749, (2016)
  • [8] QI Xiaomin, PEI Wei, LI Luyang, Et al., DC fault detection scheme for multi-terminal hybrid AC/DC distribution network based on current-limiting inductor voltage, Power Sys-tem Technology, 43, 2, pp. 537-545, (2019)
  • [9] YAO Liangzhong, WU Jing, WANG Zhibing, Et al., Studies on DC fault protection strategies for MMC based HVDC grid, Proceedings of the CSEE, 37, pp. 1-11, (2017)
  • [10] ZHOU Jiapei, ZHAO Chengyong, LI Chengyu, Et al., Boundary protection scheme for multi-terminal flexible DC grid based on voltage of DC reactor, Automation of Electric Power Systems, 41, 19, pp. 89-94, (2017)
12