A Transmission Line Current Differential Protection Based on Virtual Restraint Current

被引：0
|
作者：
Wang, Xingguo [1 ]
Zhou, Zexin [1 ]
Liu, Huanzhang [2 ]
机构：
[1] China Elect Power Res Inst, Power Syst Dynam Simulat Lab, Beijing, Peoples R China
[2] Ctr China Grid Co Ltd, Beijing, Peoples R China
来源：
2015 IEEE POWER & ENERGY SOCIETY GENERAL MEETING | 2015年
关键词：
Transmission line; Current differential protection; virtual restraint current; internal fault; external fault; RTDS simulation;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Current differential protection widely used in transmission line based on comparing sum and difference of two side current phasors. Its sensitivity was impact by load current. A current differential protection based on virtual restraint current was proposed. The virtual current contains phase information of the bigger current and amplitude information of the smaller current. The sensitivity of criterion proposed was superior to present criterion for internal faults and its reliability was the same to present criterion for external faults and normal condition. The criterion performance was proven using RTDS simulations in a 500 kV power system considering critical fault cases.
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收藏
页数：4
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