Single-Ended Protection for Flexible DC Transmission Line Based on Curvature of Initial Traveling Wave

被引：0
|
作者：
Dai Z. [1 ]
Liu Z. [1 ]
Liu X. [1 ]
Yan S. [2 ]
Jiang Y. [2 ]
机构：
[1] School of Electric and Electronic Engineering, North China Electric Power University, Baoding
[2] State Grid Yangzhou Power Supply Company, Yangzhou
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 09期
关键词：
Curvature; DC transmission line; Flexible DC system; Non-unit protection; Traveling wave dispersion;
D O I：
10.19595/j.cnki.1000-6753.tces.200229
中图分类号：
学科分类号：
摘要：
Legacy traveling-wave protections are susceptible to low sensitivity and failure under high-impedance faults. First, based on quantitative analysis on the dispersion effect of the initial traveling wave on bipolar flexible DC transmission lines and its propagation characteristics at the line boundary, the expression of initial traveling wave was derived. The relationship between the bending degree of the initial traveling wave and the fault distance, as well as the fault resistance, was obtained. Second, the notable difference between the curvature of internal and external faults was utilized to construct the fault identification criterion, and the analytical expression of the initial traveling wave provides the theoretical basis for the threshold setting. Then, the integral ratio of fault and healthy-pole superimposed-currents was used to realize fault-pole selection. Combined with the identification criterion of lightning strikes, a complete single-ended protection scheme for flexible DC transmission lines was formed. Finally, simulation in PSCAD/EMTDC was carried out to verify the scheme. The results show that the proposed scheme with enhanced tolerance to transition resistance can distinguish internal and external faultsquickly and reliably. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码：1831 / 1841
页数：10
相关论文
共 27 条
  • [1] Song Guobing, Wang Ting, Zhang Chenhao, Et al., DC line fault identification based on characteristic signal injection using the MMC of sound pole, Transaction of China Electronic technical Society, 34, 5, pp. 994-1003, (2019)
  • [2] Sun Yuanxiang, Li Zhen, Zhang Zhenbin, Hybrid predictive control with simple linear control based circulating current suppression for modular multilevel converters, CES Transactions on Electrical Machines and Systems, 3, 4, pp. 335-341, (2019)
  • [3] Zhang Xipeng, Tai Nengling, Zheng Xiaodong, Et al., Fault location in VSC-HVDC transmission lines based on WEMTR, Transaction of China Electro-technical Society, 34, 3, pp. 589-598, (2019)
  • [4] Jia Ke, Zhao Qijuan, Wang Congbo, Et al., Line protection and setting calculation for flexible DC distribution system, Automation of Electric Power Systems, 43, 19, pp. 171-183, (2019)
  • [5] Wang Xiaowei, Gao Jie, Wu Lei, Et al., A high impedance fault detection method for flexible DC distribution network, Transaction of China Electrotechnical Society, 34, 13, pp. 2806-2819, (2019)
  • [6] Li Meng, Jia Ke, Zhang Qiufang, Et al., Directional pilot protection for flexible DC distribution network based on directional characteristics of instantaneous current, Automation of Electric Power Systems, 43, 23, pp. 116-127, (2019)
  • [7] Zhou Guangyang, Li Yan, He Darui, Et al., Protection scheme for VSC-MTDC System with fault current limiter, Transactions of China Electrotechnical Society, 35, 7, pp. 1432-1443, (2020)
  • [8] Jin Tao, Su Jianshen, Zhang Mingyang, Research on DC grid protection scheme based on hybrid circuit breaker, Electric Machines and Control, 24, 3, pp. 106-113, (2020)
  • [9] Gao Shuping, Suonan Jiale, Song Guobing, Et al., A new current differential protection principle for HVDC transmission lines, Automation of Electric Power Systems, 34, 17, pp. 45-49, (2010)
  • [10] Zhou Jiapei, Zhao Chengyong, Li Chengyu, Et al., Pilot protection method for DC lines based on included angle cosine of fault current component, Automation of Electric Power System, 42, 14, pp. 165-171, (2018)
123