Incipient Fault Location for PV Collection System Based on Active Injection

被引：0
|
作者：
Zhu R. [1 ]
Jia K. [1 ]
Shi Z. [1 ]
Bi T. [1 ]
Wang C. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power University, Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 01期
基金：
国家重点研发计划;
关键词：
Active injection; Fault location; Incipient fault; PV DC collection system;
D O I：
10.13335/j.1000-3673.pst.2020.0526
中图分类号：
学科分类号：
摘要：
Incipient fault location before the short circuit fault offers great help in reducing the recovery time and avoiding the system impact. The incipient faults, however, have too weak signals to be extracted in the time and frequency domain. It is a great challenge to accurately locate the faults without affecting the power delivery. To solve this problem, an active injection based incipient fault locating method is proposed. The high-impedance characteristics of the incipient faults are revealed. The transient resistance index caused by structure changes with disturbance injection is used to locate the incipient faults. Based on PSCAD simulation, the correctness of the proposed method is verified, and its effects on the system voltage stability and power delivery are analyzed. Additionally, the accuracy of the location under noise is verified. The proposed method has high reliability, and can avoid the long time outage of the PV plants. It has good application value. © 2021, Power System Technology Press. All right reserved.
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页码：67 / 74
页数：7
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