基于中电阻法的小电流接地选线方法研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (914 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The low current grounding line selection in the substation has problems such as low accuracy rate, high omission rate and high false alarm rate, which directly affect the evaluation results of the main station of the distribution network. As a result, the automatic failure isolation cannot be realized, and the power supply reliability is greatly reduced. This paper presents a method to quickly remove the single phase grounding faults by using the arc-reducing coil controller and combining the 10kV line zero-sequence over-current protection and the 10kV column switches zero-sequence over-current protection. This method utilizes the advantages of the medium resistance to effectively improve the accuracy of line selection when single phase grounding. It has the advantages of saving investment, high efficiency, short power outage time and small power failure range. At the same time, it can effectively make up for the disadvantages of medium resistance being easily burnt out when it is put into operation for a long time and flows through short-circuit current.

Key words： low current grounding line selection medium resistance distribution network single phase grounding fault

Received: 05 September 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WU Jianyu

Cite this article:

WU Jianyu. Research on fault line selection method based on edium resistance for low current grounding system[J]. Electrical Engineering, 2023, 24(10): 17-22.

URL:

https://dqjs.cesmedia.cn/EN/Y2023/V24/I10/17

[1] 李志川, 兰生, 魏柯. 基于MRSVD-GRU的混合三端特高压直流输电线路单极接地故障定位方法[J]. 电气技术, 2023, 24(3): 1-8, 63.
[2] 牟之豫, 牟龙华, 朱吉然, 等. 小电流接地系统接地故障大数据分析平台数据库设计[J]. 电气技术, 2019, 20(6): 6-11.
[3] 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.
[4] 贺中华. 小电流接地选线装置误动作原因分析及整改措施[J]. 电工技术, 2020(3): 114-115, 118.
[5] 刘红文, 郭辉, 王科, 等. 高精度配网单相接地故障检测与定位系统研发[J]. 电气技术, 2020, 21(1): 60-66.
[6] 王俊杰. 小电流接地选线装置的测试与仿真研究[D]. 南昌: 南昌大学, 2016.
[7] 徐宏坤, 李树龙, 孙希峰, 等. 小电流接地选线装置现状分析及治理措施[J]. 化学工程与装备, 2021(5): 157-158.
[8] 武全. 小电流接地选线系统在变电站中的应用[J]. 现代制造技术与装备, 2021, 57(4): 180-181.
[9] 邱翡翠. 小电流接地系统单相接地故障选线方法的探讨[J]. 科技与创新, 2014(20): 29-30.
[10] 彭华, 朱永利. 基于apFFT频谱校正和XGBoost的风电场集电线路单相接地故障测距[J]. 电工技术学报, 2020, 35(23): 4931-4939.
[11] 朱以屏. 消弧线圈接地系统采用中电阻选线的原理及应用[J]. 华东电力, 2004, 32(11): 20-22.
[12] 周兰, 尚超. 小电流接地选线跳闸技术分析探讨与试点建设[J]. 四川电力技术, 2021, 44(1): 35-37, 82.
[13] 吴建梅. 新型小电流接地选线装置的研制[D]. 秦皇岛: 燕山大学, 2014.
[14] 惠晓辉, 张杰, 赵宏松, 等. 自动调谐消弧线圈并联中电阻及其接地选线方法[J]. 科技尚品, 2015(10): 49, 48.
[15] 史泽兵, 余江, 丁晓兵, 等. 一种新型小电流接地选线装置设计方案[J]. 供用电, 2018, 35(8): 9-13, 20.
[16] 郑顾平. 配网自动化系统小电流接地故障定位方法[D]. 北京: 华北电力大学, 2012.
[17] JIANG Xinzheng, JIANG Nan.Research and analysis of small current grounding line selection system[J]. Journal of Physics: Conference Series, 2022, 2320(1): 012003.
[18] 俞小勇, 高立克, 高艳亮, 等. 小电流接地选线装置性能评价方法研究[J]. 广西电力, 2012, 35(1): 1-4, 20.
[19] 戴军瑛. 采用消弧线圈并联中电阻的小电流接地系统故障选线方式[J]. 电力科学与工程, 2006, 22(4): 45-47.
[20] 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):4 085-4096.
[21] 张建伟, 张然, 龚栋梁, 等. 基于RTDS的配电网单相接地选线方法验证[J]. 电气技术, 2018, 19(10): 40-43, 49.