A Non-unit Adaptive Traveling Wave Protection Method for High Impedance Faults

被引：0
|
作者：
Zhang C. [1 ]
Song G. [1 ]
Dong X. [2 ]
机构：
[1] School of Electric Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province
[2] State Key Lab of Control and Simulation of Power Systems and Generation Equipments, Dept. of Electrical Engineering, Tsinghua University, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 11期
基金：
国家重点研发计划;
关键词：
Adaptive; Current fitting; Estimation interval; Fault information extraction; Non-unit traveling wave protection;
D O I：
10.13334/j.0258-8013.pcsee.190319
中图分类号：
学科分类号：
摘要：
The traditional derivative-based traveling wave protection method has the problem of operation failure when the high impedance faults occur. Based on the analysis of the influence factors of the fault traveling wave, this paper draws the conclusion that the distortion of fault traveling wave is related to the fault distance, and the amplitude of fault traveling wave is related to fault impedance. A basic fitting function was proposed to fit the zero-mode fault current, and the parameters reflecting fault distance and impedance were obtained. The fault impedance estimation interval can be obtained by extracting fault information from the obtained parameters, and the adaptive non-unit traveling wave protection method was realized. The simulation results show that the proposed method can protect the DC transmission line fast and effectively, even with high fault impedance. Comparing with the traditional traveling wave protection and transient-based protection, the proposed method has higher sensitivity and can protect wider area of the DC transmission lines. © 2020 Chin. Soc. for Elec. Eng.
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收藏
页码：3548 / 3556
页数：8
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