High-speed direction protection of flexible DC system based on voltage source converter

被引：0
|
作者：
Li B. [1 ]
Qiu H. [1 ]
Hong C. [2 ]
Zhang Y. [2 ]
Yang J. [2 ]
机构：
[1] Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin
[2] Electric Power Research Institute of CSG, Guangzhou
来源：
| 2018年 / Electric Power Automation Equipment Press卷 / 38期
关键词：
Correlation; DC distribution system; Directional criterion; Pilot protection; Voltage source converter;
D O I：
10.16081/j.issn.1006-6047.2018.02.001
中图分类号：
学科分类号：
摘要：
When faults occur in the VSC(Voltage Source Converter)-based DC distribution system, the fault currents have fast speed and high peak value, which require high quickness and reliability of protection. Aiming at the typical meshed VSC-based DC distribution system, the discriminative features between positive and reverse direction fault of protection are analyzed. On this basis, a new fast direction protection principle of DC lines is proposed, by extracting correlation characteristics of DC side parallel capacitor voltage and line current with the positive and reverse direction faults of protection. The principle has the characteristics of fast action speed, high selectivity and strong resistance to transition resistance. A four-terminal meshed DC distribution system is built in PSCAD, whose simulation examples verify the feasibility and superiority of the proposed protection principle. © 2018, Electric Power Automation Equipment Press. All right reserved.
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页码：1 / 8
页数：7
相关论文
共 17 条
  • [1] Baran M.E., Mahajan N.R., DC distribution for industrial systems: opportunities and challenges, IEEE Transactions on In- dustry Applications, 39, 6, pp. 1596-1601, (2003)
  • [2] Jiang D., Zheng H., Research status and developing prospect of DC distribution network, Automation of Electric Power Systems, 36, 8, pp. 98-104, (2012)
  • [3] Song Q., Zhao B., Liu W., Et al., An overview of research on smart DC distribution power network, Proceedings of the CSEE, 33, 25, pp. 9-19, (2013)
  • [4] Li B., He J., DC fault analysis and current limiting technique for VSC-based dc distribution, Proceedings of the CSEE, 35, 12, pp. 3026-3036, (2015)
  • [5] Dong Y., Lin W., Tian J., Et al., Control and protection system for Zhoushan multi-terminal VSC-HVDC, Electric Power Automation Equipment, 36, 7, pp. 169-175, (2016)
  • [6] Zhang Y., Tai N., Xu B., Fault analysis and traveling wave protection scheme for bipolar HVDC lines, IEEE Transactions on Power Delivery, 27, 3, pp. 1583-1591, (2012)
  • [7] Shu H., Tian X., Dong J., Et al., Identification between internal and external faults of ±800 kV HVDC transmission lines based on voltage correlation, Proceedings of the CSEE, 32, 4, pp. 151-160, (2012)
  • [8] Ding H., Tai N., Zheng X., HVDC transmission line protection method using signal distance, High Voltage Engineering, 37, 5, pp. 1186-1193, (2011)
  • [9] Li B., He J., Li Y., 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)
  • [10] Song G., Cai X., Gao S., Et al., Directional element for VSC-HVDC transmission Lines based of model identification, Power System Protection and Control, 40, 7, pp. 78-83, (2012)
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