Line Protection and Setting Calculation for Flexible DC Distribution System

被引：0
|
作者：
Jia K. [1 ]
Zhao Q. [1 ]
Wang C. [1 ]
Zhu R. [1 ]
Xuan Z. [1 ]
Sun Y. [2 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing
[2] Economic Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Flexible DC distribution system; Line protection; Modular multilevel converter (MMC); Setting calculation;
D O I：
10.7500/AEPS20180928002
中图分类号：
学科分类号：
摘要：
At present, with the gradual maturity of power electronics technology, flexible DC systems have attracted wide attention. As one of the key technologies in the development of flexible DC distribution system, the protection technology faces the main challenge of how to reliably identify and quickly isolate faults by using fault current with limited and very short duration. For the flexible DC distribution system based on converters with DC fault isolation capability, this paper analyzes the fault characteristics of single pole-to-ground fault, bipolar short-circuit fault and broken line fault of DC line, and proposes the protection scheme of DC line. Meanwhile, according to the requirements of the relay protection for the four characteristics and the coordination relationship between various protections, the boundary conditions of protection action are determined, and the reasonable range of protection setting value is deduced. The setting principle and calculation method of DC protection are formed, which provides a reference for the protection design and application in the practical engineering. Finally, a simulation model is built in the PSCAD simulation platform. The simulation results verify the feasibility of the protection scheme and the rationality of the setting value of the protection. © 2019 Automation of Electric Power Systems Press.
引用
收藏
页码：171 / 178
页数：7
相关论文
共 26 条
  • [1] Jiang D., Zheng H., Research status and developing prospect of DC distribution network, Automation of Electric Power Systems, 36, 8, pp. 98-104, (2012)
  • [2] Huang J., Wei C., Wen A., Hierarchical coordinated control strategy for flexible DC distribution network considering uncertainties of source and load, Automation of Electric Power Systems, 42, 6, pp. 106-112, (2018)
  • [3] Zhao X., Peng K., Zhang X., Et al., Analysis on dynamic performance of droop control for multi-terminal VSC based DC distribution system, Automation of Electric Power Systems, 43, 2, pp. 89-96, (2019)
  • [4] Liu G., Zhao Y., Yuan Z., Et al., Study on demonstration project technical scheme of VSC-DC distribution system in Shenzhen, Southern Power System Technology, 10, 4, pp. 1-7, (2016)
  • [5] Zhao C., Li T., Yu L., Et al., DC pole-to-ground fault characteristic analysis and converter fault recovery strategy of MMC-HVDC, Proceedings of the CSEE, 34, 21, pp. 3518-3526, (2014)
  • [6] Xing C., Wu J., Wang X., Et al., Analysis on characteristic of DC transmission line breakage fault in modular multilevel converter based HVDC transmission system, Power System Technology, 39, 7, pp. 1825-1832, (2015)
  • [7] Baran M.E., Mahajan N.R., Overcurrent protection on volage-source-converter-based multiterminal DC distribution systems, IEEE Transactions on Power Delivery, 22, 1, pp. 406-412, (2007)
  • [8] Wang Y., Zhang B., Fan X., Fast protection scheme for overhead transmission lines of VSC-based HVDC grid, Automation of Electric Power Systems, 40, 21, pp. 13-19, (2016)
  • [9] Sneath J., Rajapakse A.D., Fault detection and interruption in an earthed HVDC grid using ROCOV and hybrid DC breakers, IEEE Transactions on Power Delivery, 31, 3, pp. 973-981, (2016)
  • [10] Farhadi M., Mohammed O.A., Event-based protection scheme for a multiterminal hybrid DC power system, IEEE Transactions on Smart Grid, 6, 4, pp. 1658-1669, (2015)
123