Line Selection Method for Grounding Faults in Distribution Networks Based on Phase Similarity of Characteristic Frequency Current

LI Jianghan; ZHANG Junyi; XIONG Qing; ZHUANG Yi; TANG Yijie; ZHANG Qiwang; WANG Zhiwen; JI Shengchang

doi:10.7652/xjtuxb202504008

您当前的位置：

首页 >

文章列表页 >

Line Selection Method for Grounding Faults in Distribution Networks Based on Phase Similarity of Characteristic Frequency Current

更新时间：2026-01-06

- Line Selection Method for Grounding Faults in Distribution Networks Based on Phase Similarity of Characteristic Frequency Current
- Journal of Xi’an Jiaotong University Vol. 59, Issue 4, Pages: 81-92(2025)
- 作者机构：
  
  西安交通大学电工材料电气绝缘全国重点实验室， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202504008
  CLC： TM862
- Received：23 July 2024，
  
  Online First：04 December 2024，
  
  Published：10 April 2025
- 稿件说明：
移动端阅览
LI Jianghan, ZHANG Junyi, XIONG Qing, et al. Line Selection Method for Grounding Faults in Distribution Networks Based on Phase Similarity of Characteristic Frequency Current[J]. Journal of Xi’an Jiaotong University, 2025, 59(4): 81-92.
DOI：

LI Jianghan, ZHANG Junyi, XIONG Qing, et al. Line Selection Method for Grounding Faults in Distribution Networks Based on Phase Similarity of Characteristic Frequency Current[J]. Journal of Xi’an Jiaotong University, 2025, 59(4): 81-92. DOI： 10.7652/xjtuxb202504008.

摘要

针对小电流接地系统单相接地故障选线存在特征微弱、选线效果易受接地过渡电阻影响等难题，提出了一种采用特征频率电流相位相似度的配电网接地故障选线方法。首先，采用信号注入法，对小电流接地系统发生单相接地故障后的零序电流分布和注入特征电流信号分布展开分析，获得了故障特征电流分布规律；其次，分析不同特征频率、线路长度和线路拓扑结构对注入电流信号传播特性的影响，选择220 Hz作为注入电流的特征频率。采用PSCAD/EMTDC平台，搭建了配电网仿真模型，当故障发生后注入特征频率电流，分析每条线路特征频率信号的幅值和相位特征，利用特征频率电流的相位，提出了采用特征频率电流相位相似度的选线方法，构建了单相接地故障选线判据。对单相接地故障的不同接地过渡电阻工况进行仿真实例验证，并利用所提方法进行选线，结果表明：在高阻接地工况下，所提方法能够准确识别故障线路，具备较高的灵敏度和准确性；与传统选线方法相比，所提方法的复杂度更低，且可将接地过渡电阻提升至10 kΩ。所提方法可为小电流接地系统单相接地故障选线的理论研究提供一种新思路

Abstract

In response to the challenges of weak characteristics and the influence of grounding transition resistance on line selection for single-phase grounding faults in low-current grounding systems

a line selection method for grounding faults in distribution networks based on the phase similarity of characteristic frequency current is proposed. Firstly

using signal injection method

the distribution of zero-sequence current and characteristic current signal distribution after a single-phase grounding fault occurs in a low-current grounding system is analyzed to obtain the fault characteristic current distribution pattern. Secondly

the impact of different characteristic frequencies

line lengths

and line topologies on the propagation characteristics of the injected current signals is analyzed

with 220 Hz selected as the characteristic frequency for the injected current. Using the PSCAD/EMTDC platform

a distribution network simulation model is built. After a fault occurs

characteristic frequency current is injected

and the amplitude and phase characteristics of the characteristic frequency signals for each line are analyzed. By utilizing the phase of the characteristic frequency current

a line selection method based on the phase similarity of characteristic frequency currents is proposed

and criteria for single-phase grounding fault line selection are established. Simulation examples are conducted for different grounding transition resistance conditions of single-phase grounding faults

and line selection is performed using the proposed method. Results show that under high-resistance grounding conditions

the proposed method can accurately identify the faulty line with high sensitivity and accuracy. Compared to traditional line selection methods

the proposed method has lower complexity and can handle grounding transition resistance up to 10 kΩ. This method provides a new perspective for the theoretical research on line selection for single-phase grounding faults in low-current grounding systems.

关键词

Keywords

references

董礼清 , 薛永端 , 李娟 , 等 . 小电流接地故障零序电压分布特征与测距 [J ] . 电力系统自动化 , 2022 , 46 ( 19 ): 180 - 187 .

DONG Liqing , XUE Yongduan , LI Juan , et al . Zero-sequence voltage distribution characteristics and location of non-solidly grounding fault [J ] . Automation of Electric Power Systems , 2022 , 46 ( 19 ): 180 - 187 .

韩捷 , 刘智勇 , 周歧林 , 等 . 基于零序导纳幅值比的同母两回线异相接地复故障选线方法 [J ] . 电力工程技术 , 2024 , 43 ( 04 ): 253 - 261 .

HAN Jie , LIU Zhiyong , ZHOU Qilin , et al . Line selection method for opposite-phase grounding faults of two circuits on the same bus based on zero-sequence admittance magnitude ratio [J ] . Electric Power Engineering Technology , 2024 , 43 ( 04 ): 253 - 261 .

索南加乐 , 薛晓辉 , 高峰 , 等 . 小电流接地系统单相接地故障选线的研究 [J ] . 西安交通大学学报 , 2008 , 42 ( 4 ): 471 - 475 .

SUONAN jiale , XUE Xiaohui , GAO Feng , et al . Fault line selection in non-solid earthed network [J ] . Journal of Xi'an Jiaotong University , 2008 , 42 ( 4 ): 471 - 475 .

陶维青 , 李雪婷 , 华玉婷 , 等 . 基于曼哈顿平均距离和余弦相似度的配网单相接地故障定位 [J ] . 电力工程技术 , 2023 , 42 ( 02 ): 130 - 138 .

TAO Weiqing , LI Xueting , HUA Yuting , et al . Single-phase grounding fault location in distribution networks based on Manhattan average distance and cosine similarity [J ] . Electric Power Engineering Technology , 2023 , 42 ( 02 ): 130 - 138 .

李琰 , 赵莹 , 杜磊 , 等 . 计及分布式电源注入谐波的单相接地故障联合选线 [J ] . 电力工程技术 , 2023 , 42 ( 04 ): 113 - 121 .

LI Yan , ZHAO Ying , DU Lei , et al . Joint line selection of single-phase grounding faults considering distributed power harmonic injection [J ] . Electric Power Engineering Technology , 2023 , 42 ( 04 ): 113 - 121 .

张国军 , 张文周 , 葛群 , 等 . 基于补偿参数的多零序电流互感器的小电流接地系统单相接地故障选线方法 [J ] . 电力系统保护与控制 , 2021 , 49 ( 2 ): 1 - 9 .

ZHANG Guojun , ZHANG Wenzhou , GE Qun , et al . Single-phase ground fault line selection method of small current grounding system of multiple zero-sequence current transformer based on compensation parameters [J ] . Power System Protection and Control , 2021 , 49 ( 2 ): 1 - 9 .

郭亮 , 屈新宇 , 王晓卫 , 等 . 基于改进Hough变换的消弧线圈接地配电网故障选线新方法 [J ] . 中国电力 , 2024 , 57 ( 7 ): 132 - 142 .

GUO Liang , QU Xinyu , WANG Xiaowei , et al . A novel fault feeder selection method for resonant grounding distribution networks based on improved Hough transform [J ] . Electric Power , 2024 , 57 ( 7 ): 132 - 142 .

孙震 , 徐昊 , 朱洪志 , 等 . 基于接地故障比的不平衡配电网单相接地故障选相方法 [J ] . 电力系统保护与控制 , 2022 , 50 ( 12 ): 108 - 116 .

SUN Zhen , XU Hao , ZHU Hongzhi , et al . Phase selection method of single line to ground fault in unbalanced distribution network based on ground fault ratio [J ] . Power System Protection and Control , 2022 , 50 ( 12 ): 108 - 116 .

闫森 , 黄纯 , 刘映彤 , 等 . 基于零序功率比的灵活接地系统故障选线方法 [J ] . 电力系统及其自动化学报 , 2023 , 35 ( 3 ): 46 - 52 .

YAN Sen , HUANG Chun , LIU Yingtong , et al . Flexible fault selection method of grounding system based on zero-sequence power ratio [J ] . Proceedings of the CSU-EPSA , 2023 , 35 ( 3 ): 46 - 52 .

刘健 , 刘海 , 杨晓西 , 等 . 零序电流互感器配大电阻的配电网单相接地故障检测 [J ] . 电测与仪表 , 2023 , 60 ( 10 ): 92 - 97 .

LIU Jian , LIU Hai , YANG Xiaoxi , et al . Single-phase grounding fault detection based on zero-sequence current transformer with large resistance [J ] . Electrical Measurement & Instrumentation , 2023 , 60 ( 10 ): 92 - 97 .

LIANG Huamin , LI Haifeng , WANG Gang . A single-phase-to-ground fault detection method based on the ratio fluctuation coefficient of the zero-sequence current and voltage differential in a distribution network [J ] . IEEE Access , 2023 , 11 : 7297 - 7308 .

汤涛 , 周宇 , 曾祥君 , 等 . 基于过渡电阻评估的灵活接地系统暂态故障选线方法 [J ] . 电力系统自动化 , 2023 , 47 ( 5 ): 171 - 179 .

TANG Tao , ZHOU Yu , ZENG Xiangjun , et al . Transient fault line selection method for flexible grounded system based on transition resistance evaluation [J ] . Automation of Electric Power Systems , 2023 , 47 ( 5 ): 171 - 179 .

吴江雄 , 郑茂然 , 王欣 , 等 . 基于暂态零序导纳值的谐振接地系统单相接地故障选线方法 [J ] . 南方电网技术 , 2024 , 18 ( 11 ): 58 - 66 .

WU Jiangxiong , ZHENG Maoran , WANG Xin , et al . Single-phase grounding fault line selection method for resonant grounding system based on transient zero-sequence admittance value [J ] . Southern Power System Technology . 2024 , 18 ( 11 ): 58 - 66 .

王小帅 , 薛永端 , 刘萃萃 , 等 . 灵活接地系统小电阻退出暂态特征及对暂态故障选线方法影响 [J ] . 电力系统自动化 , 2024 , 48 ( 16 ): 174 - 183 .

WANG Xiaoshuai , XUE Yongduan , LIU Cuicui , et al . Transient characteristics of small resistor exit in flexible grounding system and implications for transient faulty-line selection methods [J ] . Automation of Electric Power Systems , 2024 , 48 ( 16 ): 174 - 183 .

CHEN Jiaquan , LI Haifeng , DENG Chengjiang , et al . Detection of single-phase to ground faults in low-resistance grounded MV systems [J ] . IEEE Transactions on Power Delivery , 2021 , 36 ( 3 ): 1499 - 1508 .

商立群 , 李瑶 . 基于组合模量S变换能量熵的配电网故障选线方法 [J ] . 西安交通大学学报 , 2022 , 56 ( 5 ): 119 - 126 .

SHANG Liqun , LI Yao . Faulty line identification in distribution network based on combined modulus and S-transform energy entropy [J ] . Journal of Xi'an Jiaotong University , 2022 , 56 ( 5 ): 119 - 126 .

YANG Shiwu , JIAO Yang , CHEN Qing , et al . A single-phase to ground fault identification method based on extremely low frequency current detection in distribution grids [J ] . IEEE Transactions on Power Delivery , 2022 , 37 ( 6 ): 5214 - 5223 .

WEI Xiangxiang , WANG Xiaowei , GAO Jie , et al . Faulty feeder detection for single-phase-to-ground fault in distribution networks based on transient energy and cosine similarity [J ] . IEEE Transactions on Power Delivery , 2022 , 37 ( 5 ): 3968 - 3979 .

WANG Xuewen , ZHANG Hengxu , SHI Fang , et al . Location of single phase to ground faults in distribution networks based on synchronous transients energy analysis [J ] . IEEE Transactions on Smart Grid , 2020 , 11 ( 1 ): 774 - 785 .

史可鉴 , 陈刚 , 吴建军 , 等 . 基于行波信号注入的配网线路单相故障状态接地诊断方法 [J ] . 电网与清洁能源 , 2022 , 38 ( 2 ): 82 - 87 .

SHI Kejian , CHEN Gang , WU Jianjun , et al . A single phase grounding fault state diagnosis method for distribution network lines based on traveling wave signal injection [J ] . Power System and Clean Energy , 2022 , 38 ( 2 ): 82 - 87 .

王志成 , 宋国兵 , 常仲学 , 等 . 配电网单相接地故障时的对地参数实时测量和选线方法 [J ] . 电网技术 , 2023 , 47 ( 9 ): 3762 - 3769 .

WANG Zhicheng , SONG Guobing , CHANG Zhongxue , et al . Real-time measurement of ground parameters and line selection for single-phase grounding faults of distribution network [J ] . Power System Technology , 2023 , 47 ( 9 ): 3762 - 3769 .

王晓卫 , 岳阳 , 郭亮 , 等 . 注入电流分布特性辨识的配电网故障选线方法 [J ] . 中国电力 , 2024 , 57 ( 10 ): 78 - 89 .

WANG Xiaowei , YUE Yang , GUO Liang , et al . Injection current distribution characteristics identification based distribution-level fault line selection [J ] . Electric Power , 2024 , 57 ( 10 ): 78 - 89 .

NIU Lin , WU Guiqing , XU Zhangsheng . Single-phase fault line selection in distribution network based on signal injection method [J ] . IEEE Access , 2021 , 9 : 21567 - 21578 .

李成钢 , 刘亚东 , 杨雪凤 , 等 . 基于变分模态分解与空洞卷积神经网络的配电网故障选线方法 [J ] . 电网与清洁能源 , 2024 , 40 ( 2 ): 110 - 118 .

LI Chenggang , LIU Yadong , YANG Xuefeng , et al . A method of fault line selection for distribution networks based on variational mode decomposition and dilated convolutional neural network [J ] . Power System and Clean Energy , 2024 , 40 ( 2 ): 110 - 118 .

张晓鹏 , 白洁 , 孙乃君 , 等 . 基于特征融合的GA-SVM配电网单相接地故障选线方法 [J ] . 电测与仪表 , 2025 , 62 ( 1 ): 140 - 148 .

ZHANG Xiaopeng , BAI Jie , SUN Naijun , et al . GA-SVM method for single-phase grounding fault line selection in distribution network based on feature fusion [J ] . Electrical Measurement & Instrumentation , 2025 , 62 ( 1 ): 140 - 148 .

缪欣 , 张忠锐 , 郭威 , 等 . 基于信号图像化和CNN-ResNet的配电网单相接地故障选线方法 [J ] . 中国测试 , 2024 , 50 ( 6 ): 157 - 166 .

MIAO Xin , ZHANG Zhongrui , GUO Wei , et al . Single-phase ground fault line selection method for distribution network based on signal imaging and CNN-ResNet [J ] . China Measurement & Test , 2024 , 50 ( 6 ): 157 - 166 .

李泽文 , 黎文娇 , 彭维馨 , 等 . 基于IHHT-RF的配电网单相接地故障选线方法 [J ] . 电力科学与技术学报 , 2024 , 39 ( 1 ): 171 - 182 .

LI Zewen , LI Wenjiao , PENG Weixin , et al . Single-phase-to-ground fault line selection method of distribution network based on IHHT-RF [J ] . Journal of Electric Power Science and Technology , 2024 , 39 ( 1 ): 171 - 182 .

朱晓红 , 杨伟荣 , 张蓉 , 等 . 基于RNN-LSTM神经网络的小电流接地故障选线方法 [J ] . 高压电器 , 2023 , 59 ( 7 ): 213 - 220 .

ZHU Xiaohong , YANG Weirong , ZHANG Rong , et al . Line selection method of low current grounding fault based on RNN-LSTM neural network [J ] . High Voltage Apparatus , 2023 , 59 ( 7 ): 213 - 220 .

LIANG Yongliang , LI Kejun , MA Zhao , et al . Multilabel classification model for type recognition of single-phase-to-ground fault based on K NN-Bayesian method [J ] . IEEE Transactions on Industry Applications , 2021 , 57 ( 2 ): 1294 - 1302 .

TEIMOURZADEH H , MORADZADEH A , SHOARAN M , et al . High impedance single-phase faults diagnosis in transmission lines via deep reinforcement learning of transfer functions [J ] . IEEE Access , 2021 , 9 : 15796 - 15809 .

GUO Moufa , GAO Jianhong , SHAO Xiang , et al . Location of single-line-to-ground fault using 1-D convolutional neural network and waveform concatenation in resonant grounding distribution systems [J ] . IEEE Transactions on Instrumentation and Measurement , 2021 , 70 : 1 - 9 .

高淑萍 , 杨莉莉 , 武心宇 , 等 . 一种适用于混合三端直流输电线路的故障定位方法 [J ] . 西安交通大学学报 , 2025 , 59 ( 1 ): 37 - 46 .

GAO Shuping , YANG Lili , WU Xinyu , et al . A fault location method for hybrid three-terminal HVDC transmission lines [J ] . Journal of Xi'an Jiaotong University , 2025 , 59 ( 1 ): 37 - 46 .

国家技术监督局 . 电能质量　公用电网谐波：GB/T 14549-1993 [S ] . 北京 : 中国标准出版社 , 1993 .

王建元 , 张峥 . 基于注入信号与小波能量的小电流接地故障选线研究 [J ] . 电测与仪表 , 2018 , 55 ( 5 ): 28 - 32 .

WANG Jianyuan , ZHANG Zheng . Research of fault line selection in small current grounding system based on injected signal and wavelet energy [J ] . Electrical Measurement & Instrumentation , 2018 , 55 ( 5 ): 28 - 32 .

王慧 , 范正林 , 桑在中 . "S注入法"与选线定位 [J ] . 电力自动化设备 , 1999 , 19 ( 3 ): 18 - 20 .

WANG Hui , FAN Zhenglin , SANG Zaizhong . The "S signal injection method" and its application in single phase-to-earth fault line identification and fault point location [J ] . ElectricPower Automation Equipment , 1999 , 19 ( 3 ): 18 - 20 .

杜刚 , 刘迅 , 苏高峰 . 基于FTU和"S"信号注入法的配电网接地故障定位技术的研究 [J ] . 电力系统保护与控制 , 2010 , 38 ( 12 ): 73 - 76 .

DU Gang , LIU Xun , SU Gaofeng . Research on technology of grounding fault location combining FTU and ‘S’ signal injecting method in distribution grid [J ] . Power System Protection and Control , 2010 , 38 ( 12 ): 73 - 76 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Fault Line Selection in Non-Solid Earthed Network

Replacement and Investment Strategy for Distribution Transformers in Rural Area Based on Life Cycle Cost Theory and Risk Assessment

Analysis of Semantic Rules for the Influences of Integrating Distributed Generations on the Distribution Network Current Protections

Turbulent Kinetic Energy Dissipation Mechanism of Supercritical Carbon Dioxide Leakage Flow in a Scallop Bionic Seal Cavity

Effects of Expansion Angle Crater Film Hole on the Film Cooling Characteristics of a Double-Wall Structure

Related Author

索南加乐

薛晓辉

高峰

顾嘉

邓旭阳

张恒 1

王建学 2

曹晓宇 2

Related Institution

School of Electrical Engineering, Xi'an Jiaotong University

School of Finance and Economics, Xi'an Jiaotong University

School of Electrical Engineering, Wuhan University

⁰