Fast Short-circuit Fault Identification Method Based on Phase Current Difference

被引：0
|
作者：
Yang S. [1 ,2 ]
Dai C. [3 ]
Li F. [1 ,2 ]
Wang Q. [1 ,2 ]
Liu W. [1 ,2 ]
机构：
[1] NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing, 211000, Jiangsu Province
[2] China EPRI Science & Technology Co., Ltd., Changping District, Beijing
[3] State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 06期
关键词：
Fast identification; Fault current limiter; Phase current difference; Short-circuit fault;
D O I：
10.13335/j.1000-3673.pst.2019.0161
中图分类号：
学科分类号：
摘要：
The action speed of fault current limiter (FCL) is closely related to the speed of short-circuit fault identification. When a single-phase fault occurs in the power system, the FCL of non-fault-phase should not act. Therefore, the setting value of the FCL action should be greater than the current change of the non-fault-phase when the single-phase fault occurs, resulting in the increase of the setting value and the decrease of the identification speed. In order to solve this problem, this paper proposes a phase current difference criterion, which can quickly judge whether the fault is a single-phase ground fault of other phases after the fault occurs, and reduce the FCL action setting value of this phase. In this paper, the characteristics of phase current difference are analyzed theoretically, and a new short-circuit fault identification method is formed by using the phase current difference to reduce setting value of current instantaneous value criterion. Through simulation and field short-circuit current analysis, it is proved that the proposed method has the characteristics of fast identification speed, less calculation and high reliability. © 2020, Power System Technology Press. All right reserved.
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页码：2330 / 2335
页数：5
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