Single-phase earth fault protection method based on combined voltage criterion in high voltage shunt capacitor

被引：0

作者：

Ma W. ^{[1
]}

Kong S. ^{[1
]}

Liu C. ^{[1
]}

Song C. ^{[1
]}

Liu Y. ^{[1
]}

机构：

[1] State Grid Henan Electric Power Research Institute, Zhengzhou

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 22期

关键词：

Combined voltage; Comparing; Shunt capacitor; Single-phase earth fault; Voltage phase; Voltage value;

D O I：

10.19783/j.cnki.pspc.181608

中图分类号：

学科分类号：

摘要：

In allusion to the insufficiency of capacitor bank single-phase fault protection at present, this paper puts forward a combined voltage criterion protection method by comparing three-phase ground voltage to distinguish the single-phase earth fault. Aiming at constructing combined voltage criterion, voltage value comparison method and voltage phase comparison method are analyzed theoretically and a protection setting calculation method is given. Through analyzing and comparing the advantage and disadvantage of the two methods, voltage value comparison method is recommended to construct the combined voltage criterion. Furthermore, the feasibility of combined voltage criterion is verified by simulation. Since the protection will act only if all the three phase voltages are satisfied, the combined voltage criterion has a better function to prevent protection misoperation caused by PT breaking. © 2019, Power System Protection and Control Press. All right reserved.

引用

页码：142 / 147

页数：5

共 21 条

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