Fault Location Method for Multi-terminal Flexible DC Distribution Network Based on Control and Protection Coordination

被引：0
|
作者：
Liu K. [1 ]
Ren Z. [1 ]
Wang Y. [2 ]
机构：
[1] China Electric Power Research Institute, Beijing
[2] College of Electrical Engineering, Southwest Minzu University, Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 08期
关键词：
control and protection coordination; current limiting reactor; fault location; multi-terminal flexible DC distribution network; signal injection method;
D O I：
10.13336/j.1003-6520.hve.20221319
中图分类号：
学科分类号：
摘要：
The fault current of the flexible DC distribution network has a large impact and serious harm. By changing the control strategy of the controllable elements in the flexible DC distribution network, the fault characteristics can be changed, thereby providing support for fault protection and ranging. Therefore, this paper proposes a fault location method for multi-terminal flexible DC distribution network based on the coordination of control and protection. Firstly, a four-terminal flexible DC distribution network is taken as an example, and the fault characteristics and current limiting characteristics of the distribution network are analyzed. Secondly, the influence of the key equipment current-limiting reactor in the flexible distribution network on the fault characteristics of the DC distribution network is studied, and thereby, a two-stage control and protection coordination strategy for the DC distribution network is proposed. In the first stage of the coordination of control and protection, the current-limiting characteristics of the current-limiting reactor are used to suppress the development of the fault current and assist the fault isolation; In the second stage of the coordination of control and protection, the on-off strategy of the current-limiting reactor is controlled, a small controllable current is injected into the DC distribution network through short-term reclosing, and fault location is carried out. Finally, a four-terminal flexible DC distribution network simulation model with photovoltaic/storage is built to verify the effectiveness of the proposed method. © 2023 Science Press. All rights reserved.
引用
收藏
页码：3458 / 3466
页数：8
相关论文
共 21 条
  • [11] XUE Shimin, ZHU Xiaoshuai, WANG Shouxiang, Current single-ended ranging protection of ring DC microgrid based on control and protection cooperation, High Voltage Engineering, 48, 12, pp. 4959-4967, (2022)
  • [12] FANG Chongkai, MU Longhua, OU Rui, Et al., Research on control-protection coordination based injection protect scheme of microgrid, Proceedings of the CSEE, 43, 9, pp. 3389-3402, (2023)
  • [13] DHAR S, PATNAIK R K, DASH P K., Fault detection and location of photovoltaic based DC microgrid using differential protection strategy, IEEE Transactions on Smart Grid, 9, 5, pp. 4303-4312, (2018)
  • [14] XUE Shimin, LI Zheng, LIU Cunjia, Et al., Review of DC microgrids grounding and study on protection methods based on control and protection cooperation, High Voltage Engineering, 46, 7, pp. 2255-2268, (2020)
  • [15] XUE Shimin, QI Jinlong, LIU Chong, A research review of protection for DC microgrid, Proceedings of the CSEE, 36, 13, pp. 3404-3412, (2016)
  • [16] LIU Xinrui, XIE Zhiyuan, SUN Qiuye, Et al., Fault analysis and protection for LV bipolar DC microgrid, Power System Technology, 40, 3, pp. 749-755, (2016)
  • [17] JIA Ke, XUAN Zhenwen, CHEN Jinfeng, Et al., Control and protection coordination based identification strategy of DC fault for photovoltaic DC boosting integration system, Automation of Electric Power Systems, 43, 24, pp. 134-141, (2019)
  • [18] LI Jialin, Research on the line fault current limiting and recovery method of flexible dc grid, (2021)
  • [19] MONADI M, GAVRILUTA C, LUNA A, Et al., Centralized protection strategy for medium voltage DC microgrids, IEEE Transactions on Power Delivery, 32, 1, pp. 430-440, (2017)
  • [20] ZHU Rui, JIA Ke, ZHAO Qijuan, Et al., Fault section identification of flexible DC collection system based on collaborated control-protection method, Power System Technology, 43, 8, pp. 2825-2834, (2019)
123