Research on protection strategy of a hybrid multi-terminal DC system based on LCC and FHMMC

被引：0
|
作者：
Tian P. [1 ]
Wu Q. [1 ]
Huang J. [1 ]
Sun P. [1 ]
Li Y. [1 ]
Yue X. [1 ]
E S. [2 ]
机构：
[1] XJ Electric Co. Ltd., Xuchang
[2] State Grid Hubei Electric Power Co., Ltd., Wuhan
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2021年 / 49卷 / 01期
关键词：
DC line fault; DC line protection; Fault area; Hybrid multi-terminal; Rapidity;
D O I：
10.19783/j.cnki.pspc.200211
中图分类号：
TM7 [输配电工程、电力网及电力系统];
学科分类号：
080802 ;
摘要：
The detection and isolation of hybrid multi-terminal DC line fault is an urgent problem. In this paper, aiming at the topology structure of hybrid multi-terminal DC system based on Line Commutated Converter (LCC) and Hybrid Half Bridge Modular Multilevel Converter (FHMMC), a multi-terminal DC line protection scheme is proposed. First, by configuring fast line protection system, the line fault is detected before the Modular Multilevel Converter (MMC) is over-currently blocked. Secondly, a configuration scheme is proposed in which the two ends of the converter station are configured with a line protection system to protect the full length of the DC line, and the intermediate converter station is configured with a line protection system to protect the two lines. Based on this, a line fault area identification criterion is constructed using the difference in current changes on both sides of the bus bar area after a line fault to solve the problem of multi-terminal line fault area identification. Finally, in cooperation with the control system, the DC voltage of the MMC station is controlled to zero or negative pressure, and the LCC station is quickly phase-shifted to realize self-clearing and isolation of line faults. The feasibility of the proposed strategy is verified by simulation. © 2021 Power System Protection and Control Press.
引用
收藏
页码：170 / 177
页数：7
相关论文
共 21 条
  • [1] ZHANG Wenliang, TANG Yong, ZENG Nanchao, Multi-terminal HVDC transmission technologies and its application prospect in China, Power System Technology, 34, 9, pp. 1-6, (2010)
  • [2] WU Bo, LI Huimin, BIE Rui, Et al., Current development and research prospect of VSC-MTDC, Modern Electric Power, 32, 2, pp. 9-15, (2015)
  • [3] XU Feng, XU Zheng, Hybrid HVDC system based on LCC and FHMMC, High Voltage Engineering, 40, 8, pp. 2520-2530, (2014)
  • [4] HERTEM D V, GHANDHARI M., Multi-terminal VSC HVDC for the European supergrid obstacles, Renewable and Sustainable Energy Reviews, 14, 9, pp. 3156-3163, (2010)
  • [5] BOULANGER A G, CHU A C, MAXX S, Et al., Vehicle electrification: status and issues, Proceedings of the IEEE, 99, 6, pp. 1116-1138, (2011)
  • [6] YAO Weizheng, XING Dengjiang, WU Jinlong, Et al., Study on ultra-high-speed protection method of flexible HVDC grid, Power System Technology, 41, 6, pp. 1710-1718, (2017)
  • [7] DESCLOUX J, RAULT P, NGUEFEU S, Et al., HVDC meshed grid: control and protection of a multi-terminal HVDC system, 2012 CIGRE Session, (2012)
  • [8] 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. 1-12, (2016)
  • [9] CAO Runbin, LI Yan, XU Shukai, Et al., Research on configuration and coordination of multi-terminal hybrid UHVDC line protection, Southern Power System Technology, 12, 11, pp. 52-58, (2018)
  • [10] ZHANG Junjie, XIANG Wang, LIN Weixing, Et al., DC fault protection of VSC-HVDC grid based on hybrid MMC and DC switch, Electric Power Construction, 38, 8, pp. 52-58, (2017)
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