|
|
|
| Improvement of protection function for the 10 kV small resistance grounding system ring busbar grounding transformer in substation |
| WANG Baoqing, YU Yang, CAO Hao, QIU Huan, MA Yufei |
| State Grid Beijing Fangshan Power Supply Company, Beijing 102400 |
|
|
|
|
Abstract With the rapid development of urban power grids, the power grid has gradually evolved from a small current grounding system to a small resistance grounding system. The small resistance grounding system requires zero sequence current protection, which requires the relay protection device to act immediately to cut off the fault when a grounding fault occurs, in order to reduce the impact of grounding short-circuit current on the equipment. However, for 10 kV substations using ring busbars, the current protection principles cannot accurately distinguish the fault location when a grounding fault occurs on the busbar. This article first analyzes the operation mode of grounding transformers and the characteristics of different fault points, and verifies them through simulation experiments. Then, an improved grounding transformer protection device is proposed to achieve accurate fault location.
|
|
Received: 10 February 2025
|
|
|
|
| Cite this article: |
|
WANG Baoqing,YU Yang,CAO Hao等. Improvement of protection function for the 10 kV small resistance grounding system ring busbar grounding transformer in substation[J]. Electrical Engineering, 2025, 26(12): 58-64.
|
|
|
|
| URL: |
|
https://dqjs.cesmedia.cn/EN/Y2025/V26/I12/58
|
[1] 刘育权, 蔡燕春, 邓国豪, 等. 小电阻接地方式配电系统的运行与保护[J]. 供用电, 2015, 32(6): 30-35.
[2] 李政洋, 李景禄, 苏盛, 等. 基于配电网单相接地故障分区的中性点智能电阻接地方法[J]. 电力系统自动化, 2019, 43(6): 145-150, 170.
[3] 吴建宇. 基于中电阻法的小电流接地选线方法研究[J]. 电气技术, 2023, 24(10): 17-22.
[4] 李君, 何敏, 黄守道, 等. 基于相位差的小电阻接地有源配电网接地故障保护算法[J]. 电工技术学报, 2024, 39(23): 7418-7429.
[5] 黄志方, 魏立新, 李刚. 消弧线圈并联小电阻的灵活接地方式[J]. 广东电力, 2014, 27(6): 64-67.
[6] 张新明. 10kV小电阻接地系统运行方式分析与探讨[J]. 电气技术, 2011, 12(7): 82-84.
[7] 3kV~110kV电网继电保护装置运行整定规程: DL/T 584—2017[S] DL/T 584—2017[S]. 北京: 中国电力出版社, 2017.
[8] 徐丙垠, 李天友, 薛永端. 配电网继电保护与自动化[M]. 北京: 中国电力出版社, 2017.
[9] 徐玉琴, 杨浩, 李鹏. 含逆变型分布式电源的小电阻接地方式配电网单相接地故障分析[J]. 电测与仪表, 2018, 55(16): 57-63, 71.
[10] 杨帆, 任伟, 沈煜, 等. 消弧线圈并联小电阻系统接地故障灵活处理策略[J]. 供用电, 2019, 36(3): 44-49.
[11] 王国彬, 涂恩来, 曾静岚, 等. 基于ATP-EMTP的10kV配电系统不同中性点接地方式电气特性仿真分析[J]. 电瓷避雷器, 2020(6): 86-94.
[12] 刘宏伟, 朱东坡, 刘捷, 等. 配电网中性点经小电阻接地方式下的小电阻选取[J]. 电网与清洁能源, 2018, 34(7): 31-37. |
|
|
|
2025, Vol. 26 
