|
|
|
| The treatment of differential ground fault based on the external signal |
| ZHANG Guangru1, CHEN Jie1, XIA Wang2, ZHANG Jiawu1, LIU Binyu1 |
1. State Grid Gansu Electric Power Research Institution, Lanzhou 730070;
2. State Grid Pingliang Electric Power Company, Pingliang, Gansu 744000 |
|
|
|
|
Abstract In order to solve the ground fault in ungrounded systems, this paper applies the differential protection method based on the “external signal generating device and feeder terminal unit” to the external signal ground fault selection technology, proposes differential protection method of ground fault detection criteria and action principles, and achieves segment selection on the basis of ground fault phase selection. Finally, the effectiveness of the method is verified through a case study, and the results show that the proposed fault discrimination method has high accuracy and can minimize the range of ground fault power outages, which can also improve fault handling efficiency and power supply reliability.
|
|
Received: 18 July 2024
|
|
|
|
| Cite this article: |
|
ZHANG Guangru,CHEN Jie,XIA Wang等. The treatment of differential ground fault based on the external signal[J]. Electrical Engineering, 2025, 26(1): 64-68.
|
|
|
|
| URL: |
|
https://dqjs.cesmedia.cn/EN/Y2025/V26/I1/64
|
[1] 郭王勇. 智能配电网概论[M]. 北京: 中国电力出版社, 2024.
[2] 徐丙垠, 薛永端, 冯光, 等. 配电网接地故障保护若干问题的探讨[J]. 电力系统自动化, 2019, 43(20): 1-7.
[3] LI Jiansheng, LIANG Jun.10kV straight line fault location based on “signal injection method”[C]//2011 IEEE Power Engineering and Automation Conference, Wuhan, China, 2011: 512-515.
[4] 姜健, 鲍光海. 小电流接地系统单相接地故障选线方法综述[J]. 电气技术, 2015, 16(12): 1-5.
[5] 薛永端, 汪洋, 徐丙垠. 小电阻接地系统高灵敏度阶段式零序过电流保护[J]. 中国电机工程学报, 2020, 40(19): 6217-6226.
[6] 王建元, 朱永涛, 秦思远. 基于方向行波能量的小电流接地系统故障选线方法[J]. 电工技术学报, 2021, 36(19): 4085-4096.
[7] 龙毅, 欧阳金鑫, 熊小伏, 等. 基于零序功率变化量的配电网单相高阻接地保护[J]. 电工技术学报, 2019, 34(17): 3687-3695.
[8] 杨帆, 金鑫, 沈煜, 等. 基于零序导纳变化的灵活接地系统接地故障方向判别算法[J]. 电力系统自动化, 2020, 44(17): 88-94.
[9] 栾晓明, 武守远, 贾春娟, 等. 基于改进零序导纳法的单相接地故障选线原理[J]. 电网技术, 2022, 46(1): 353-360.
[10] 王康, 高伟, 杨耿杰. 基于高频分量的配电网高阻接地故障识别[J]. 电气技术, 2022, 23(2): 61-66.
[11] 罗立波, 高阳, 谷彩连, 等. 基于S变换和可信度决策的谐振接地系统故障选线新方法[J]. 电测与仪表, 2019, 56(15): 84-90.
[12] 黄劼, 汪逸帆, 林叶青, 等. 基于K均值聚类算法的谐振接地系统故障区段定位方法[J]. 电气技术, 2024, 25(3): 24-31.
[13] 林骏捷, 林佳壕, 郭谋发. 基于多暂态特征量聚类的配电网接地故障区段定位方法[J]. 电气技术, 2023, 24(5): 16-22.
[14] 配电线路故障指示器通用技术条件: DL/T 1157—2019[S]. 北京: 中国电力出版社, 2019.
[15] 张聪. 基于FTU的配电网馈线故障区段定位系统分析[J]. 电子技术, 2024, 53(4): 130-131. |
|
|
|
2025, Vol. 26 
