A Novel Traveling-Wave Directional Relay Based on Apparent Surge Impedance

被引：31
|
作者：
He, Zhengyou [1 ]
Liu, Xingmao [1 ]
Li, Xiaopeng [1 ]
Mai, Ruikun [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2015年 / 30卷 / 03期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Apparent surge impedance; directional relay; S-transform; transmission line; traveling wave; TRANSMISSION-LINE PROTECTION; NON-COMMUNICATION PROTECTION; S-TRANSFORM; DISTANCE PROTECTION; FAULT CLASSIFICATION; ALGORITHM; SCHEME; TRANSIENTS;
D O I：
10.1109/TPWRD.2014.2362929
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel directional relay, which is based on apparent surge impedance acquired from initial traveling waves, is proposed in this paper. The phasor of initial voltage and current traveling waves extracted by the S-transform are employed to calculate the apparent surge impedance. The criteria to determine the fault direction consist of two mho circles. One is the forward mho circle which is set according to the backside busbar surge impedance. The other one is the reverse mho circle which is set according to the forward line surge impedance. The fault direction is determined per the relationship between the apparent surge impedance and the mho circles. The proposed algorithm was verified using PSCAD/EMTEDC software. The simulation results allow us to draw a conclusion that the proposed algorithm has the ability to reliably discriminate between the forward faults and the reverse faults under various conditions.
引用
收藏
页码：1153 / 1161
页数：9
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