Key technologies on single-phase earthed fault protection for a distribution network

被引：0

作者：

Liu J. ^{[1
,2
]}

Wang Y. ^{[1
,2
]}

Zhang X. ^{[2
]}

Zhang Z. ^{[1
,2
]}

Quan L. ^{[2
]}

Chen J. ^{[2
]}

机构：

[1] School of Electrical Engineering, Xi'an University of Technology, Xi'an

[2] State Grid Shaanxi Electric Power Research Institute, Xi'an

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2021年 / 49卷 / 22期

基金：

中国国家自然科学基金;

关键词：

Arc suppression coils; Distribution networks; Neutral non-effectively grounded systems; Relay protection; Single-phase earthed fault; Substations;

D O I：

10.19783/j.cnki.pspc.202162

中图分类号：

学科分类号：

摘要：

To help single-phase earthed fault management for neutral non-effectively grounded systems, the protection approaches in substations and on outside feeders are described. Some technical issues and solutions are discussed, such as time delay for tripping, permanent fault identification after reclosing, influence of the zero-sequence voltage transient, and handling intermittent arc earthed faults and cascading faults. The concept of three defensive lines for dealing with a signal-phase grounded fault in substations is elaborated. It consists of arc suppression coils, earthed fault protection and automatic searching approach in SCADA. It is emphasized that the field systematic test is an essential measure for earthed fault protection. The engineering of earthed fault protection with fifty-six substations in Xi'an city is introduced as an example. This shows the feasibility and effectiveness of the proposed approaches. © 2021 Power System Protection and Control Press.

引用

页码：18 / 23

页数：5

共 24 条

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