配电网单相断线不接地故障序电压分析

Abstract
Figure/Table
References (16)
Related Citation (15)

Download: PDF (716 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The ungrounded broken-line fault of distribution network has the characteristics of high hazard degree and difficult identification, so it is necessary to study its fault voltage characteristics. Composite sequence network models are developed for ungrounded broken-line faults under three neutral configurations (low-resistance, ungrounded, and Petersen coil) based on boundary conditions and equivalent circuits. Analytical expressions for sequence voltages are derived at multiple measurement points: 10 kV busbars, fault line terminals, and 380 V post-fault sections. The research examines the correlation between busbar zero-sequence voltage and post-fault line capacitance, analyzes the relationship between negative-sequence voltage and system-to-load impedance ratio. Matlab simulation validates the theoretical analysis with excellent consistency. The findings provide crucial theoretical foundations for distribution network broken-line fault diagnosis.

Key words： distribution network ungrounded broken-line fault analysis of sequence voltages composite sequence network impedance ratio

Received: 01 July 2025

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	CHEN Chenggong
	CHEN Yulong
	LI Can
	TANG Tao
	ZHAO Wei

Cite this article:

CHEN Chenggong,CHEN Yulong,LI Can等. Analysis of sequence voltage for single-phase ungrounded broken-line faults in distribution network[J]. Electrical Engineering, 2025, 26(12): 29-34.

URL:

https://dqjs.cesmedia.cn/EN/Y2025/V26/I12/29

[1] 陈军, 隋佳闽, 赵子涵, 等. 输电线路断线故障保护逻辑分析及附加判别方法[J]. 电力系统保护与控制, 2022, 50(4): 103-111.
[2] 李梓畅, 刘亚东, 严英杰, 等. 一种中压配电网单相断线接地复故障诊断方法[J]. 电机与控制学报, 2022, 26(2): 43-53.
[3] 曾祥君, 黄慧, 喻锟, 等. 基于柔性调控零序电压的配电网高阻接地及单相断线故障的选相方法[J]. 电力系统保护与控制, 2022, 50(3): 9-18.
[4] 蔡胜, 谢云云, 张玉坪, 等. 考虑孤岛微电网建立过程功率冲击的弹性配电网主动预防调度[J]. 电工技术学报, 2023, 38(23): 6419-6432.
[5] 王建南. 结合暂态零序电流及小波分解的谐振接地系统故障选线方法[J]. 电气技术, 2025, 26(5): 48-51, 57.
[6] 陶宇航, 张熹, 宫祥龙. 10kV电缆故障测距及定位典型案例分析[J]. 电气技术, 2022, 23(2): 88-93.
[7] 林万里, 杨耿杰, 郭谋发. 配电网弧光高阻接地故障仿真与实测波形差异性分析[J]. 电气技术, 2025, 26(6): 38-44.
[8] 钟逸涵, 邓丰, 史鸿飞, 等. 基于动态电阻串联的高阻接地故障精确建模[J]. 电工技术学报, 2024, 39(7): 2046-2059.
[9] 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.
[10] 薛永端, 陈梦琦, 曹丽丽, 等. 不接地系统单相断线故障电压分析[J]. 中国电机工程学报, 2021, 41(4): 1322-1333, 1539.
[11] 黄飞, 陈纪宇, 欧阳金鑫, 等. 基于正序电压差的含分布式电源配电网断线接地复合故障定位方法[J]. 电力系统保护与控制, 2022, 50(24): 37-48.
[12] 张林利, 曹丽丽, 李立生, 等. 不接地系统单相断线故障分析及区段定位[J]. 电力系统保护与控制, 2018, 46(16): 1-7.
[13] 王士新, 张慧芬, 徐斌, 等. 小电流接地系统单相断线接地复故障类型诊断[J]. 电力自动化设备, 2018, 38(7): 134-139, 147.
[14] YANG Fan, LI He, HU Wei, et al.Identification of single-phase line break fault direction based on local voltage information in small current grounding system considering the impact of DG[J]. IEEE Access, 2023, 11: 120754-120765.
[15] 郑鹏, 韩鹏程, 王国栋, 等. 中压配电线路断线高阻接地故障精细化诊断方法[J]. 中国电力, 2024, 57(4): 220-228.
[16] LI He, XUE Yongduan, CHEN Mengqi, et al.Analysis of voltage characteristics for single-phase line break fault in resonant grounding systems[J]. IEEE Transa- ctions on Power Delivery, 2023, 38(2): 1416-1425.