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针对小电阻系统单相接地故障后人工巡线耗时长导致供电可靠性低的问题，提出一种基于零序电压投影量梯度的测距方法来确定精确故障位置。首先，利用零序等效电路图重点分析了小电阻接地系统单相接地后零序电流和零序电压的分布特征。其次，通过故障线路零序电压变化的相量图分析了单一类型线路和混合线路零序电压投影量的分布特征，发现将混合线路进行等效之后，二者的投影量均为关于到母线距离的一次函数。最后，在准确获取区段定位结果的基础上，提出了基于零序电压投影量梯度的测距方法。利用MATLAB/Simulink搭建了10 kV小电阻系统，在不同线路类型上进行了仿真实验，结果验证了该方法具备较高的测距精度，且可有效克服单一类型线路参数不准确对测距结果的影响。
Abstract：Aiming at the problem of low power supply reliability caused by long time-consuming manual line inspection after single-phase grounding faults of low-resistance grounding systems,a fault location method based on zero-sequence voltage projection gradient is proposed to determine the accurate fault location.Firstly,the distribution characteristics of zero-sequence current and zero-sequence voltage after single-phase grounding of low resistance grounding system are analyzed by using a zero-sequence equivalent circuit diagram. Secondly,the distribution characteristics of zero-sequence voltage projections of single-type lines and hybrid lines are analyzed by the phasor diagram of zero-sequence voltage changes of fault lines.It is found that after the hybrid lines are equivalent,the projections of both are linear functions of the distance to the bus.Finally,on the basis of accurately obtaining the location results of the section,a ranging method based on the gradient of zerosequence voltage projection is proposed. A 10 kV small resistance grounding distribution network is built by MATLAB/Simulink,and simulation experiments are carried out on different line types.The results show that the method has high ranging accuracy and can effectively overcome the influence of inaccurate parameters of a single type of line on ranging results.
[1]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.XU Bingyin,XUE Yongduan,FENG Guang,et al. Discussion on several problems of earthing fault protection in distribution network[J].Automation of Electric Power Systems,2019,43(20):1-7.
[2]刘健，张志华，王毅钊.基于电压信息的配电网断线故障定位[J].电力系统自动化，2020,44(21):123-131.LIU Jian,ZHANG Zhihua,WANG Yizhao. Voltage information based line-broken fault location for distribution network[J].Automation of Electric Power Systems,2020,44(21):123-131.
[3]任伟，薛永端，徐丙垠，等.小电阻接地系统高阻接地故障纵联差动保护[J].电网技术，2021,45(8):3276-3282.REN Wei,XUE Yongduan,XU Bingyin,et al. Longitudinal differential protection of high resistance grounding faults in lowresistance grounding system[J].Power System Technology,2021,45(8):3276-3282.
[4]付晓奇，徐粮珍，赵宝丽.10kV配网中性点小电阻接地技术与应用[J].电力系统保护与控制，2010,38(23):227-230.FU Xiaoqi,XU Liangzhen,ZHAO Baoli. Discussion on the technology and application of 10 kV distribution network neutral grounding through small resistance[J]. Power System Protection and Control,2010,38(23):227-230.
[5]张健磊，高湛军，陈明，等.考虑复故障的有源配电网故障定位方法[J].电工技术学报，2021,36(11):2265-2276.ZHANG Jianlei,GAO Zhanjun,CHEN Ming,et al. Fault location method for active distribution networks considering combination faults[J].Transactions of China Electrotechnical Society,2021,36(11):2265-2276.
[6] ABOSHADY F M,THOMAS D W P,SUMNER M. A new single end wideband impedance based fault location scheme for distribution systems[J]. Electric Power Systems Research,2019,173:263-270.
[7] MAJIDI M,ETEZADI-AMOLI M. A new fault location technique in smart distribution networks using synchronized/nonsynchronized measurements[J].IEEE Transactions on Power Delivery,2018,33(3):1358-1368.
[8]张建文，周鹏，陈焕栩.基于改进阻抗法的单相接地故障测距仿真[J].电测与仪表，2018,55(3):84-87.ZHANG Jianwen,ZHOU Peng,CHEN Huanxu. Simulation of transmission line single-phase ground fault location based on improved impedance method[J]. Electrical Measurement&Instrumentation,2018,55(3):84-87.
[9]周聪聪，舒勤，韩晓言.基于线模行波突变的配电网单相接地故障测距方法[J].电网技术，2014,38(7):1973-1978.ZHOU Congcong,SHU Qin,HAN Xiaoyan.A single-phase earth fault location scheme for distribution network based on mutation of line mode traveling wave[J].Power System Technology,2014,38(7):1973-1978.
[10]赵乔，王增平，董文娜，等.基于免疫二进制粒子群优化算法的配电网故障定位方法研究[J].电力系统保护与控制，2020,48(20):83-89.ZHAO Qiao,WANG Zengping,DONG Wenna,et al.Research on fault location in a distribution network based on an immune binary particle swarm algorithm[J].Power System Protection and Control,2020,48(20):83-89.
[11]戴志辉，王旭.基于改进阻抗法的有源配电网故障测距算法[J].电网技术，2017,41(6):2027-2034.DAI Zhihui,WANG Xu. Impedance method based fault location algorithm for active distribution system[J]. Power System Technology,2017,41(6):2027-2034.
[12]齐郑，黄朝晖，陈艳波.基于零序分量的阻抗法配电网故障定位技术[J].电力系统保护与控制，2023,51(6):54-62.QI Zheng,HUANG Zhaohui,CHEN Yanbo. Impedance fault location technology for a distribution network based on a zerosequence component[J]. Power System Protection and Control,2023,51(6):54-62.
[13]谢李为，李勇，罗隆福，等.基于极点对称分解的多分支线路故障定位方法[J].中国电机工程学报，2021,41(21):7326-7338.XIE Liwei,LI Yong,LUO Longfu,et al.Fault location method for multi-branch lines based on extreme-point symmetric mode decomposition[J].Proceedings of the CSEE,2021,41(21):7326-7338.
[14] SHU H C,LIU X H,TIAN X C. Single-ended fault location for hybrid feeders based on characteristic distribution of traveling wave along a line[J].IEEE Transactions on Power Delivery,2021,36(1):339-350.
[15]徐彪，尹项根，张哲，等.矩阵算法和优化算法相结合的配电网故障定位[J].电力系统自动化，2019,43(5):152-158.XU Biao,YIN Xianggen,ZHANG Zhe,et al. Fault location for distribution network based on matrix algorithm and optimization algorithm[J].Automation of Electric Power Systems,2019,43(5):152-158.
[16]邓飞，梁仕斌，田庆生，等.基于有向拓扑-时间延时和容错机制的配电网故障定位方法[J].电气自动化，2019,41(3):73-77.DENG Fei,LIANG Shibin,TIAN Qingsheng,et al. Distribution network fault location based on directional topology-time delay and fault tolerance mechanism[J].Electrical Automation,2019,41(3):73-77.
[17]黄佳乐，杨冠鲁.配电网故障区间定位的改进矩阵算法[J].电力系统保护与控制，2014,42(11):41-45.HUANG Jiale,YANG Guanlu.Modified matrix algorithm for fault section location of distribution network[J]. Power System Protection and Control,2014,42(11):41-45.
[18]刘鹏程，李新利.基于多种群遗传算法的含分布式电源的配电网故障区段定位算法[J].电力系统保护与控制，2016,44(2):36-41.LIU Pengcheng,LI Xinli. Fault-section location of distribution network containing distributed generation based on the multiplepopulation genetic algorithm[J]. Power System Protection and Control,2016,44(2):36-41.
[19]彭华，王文超，朱永利，等.基于LSTM神经网络的风电场集电线路单相接地智能测距[J].电力系统保护与控制，2021,49(16):60-66.PENG Hua,WANG Wenchao,ZHU Yongli,et al. An intelligent single-phase grounding fault location for a wind farm collection line based on an LSTM neural network[J].Power System Protection and Control,2021,49(16):60-66.
[20]孟子超，杜文娟，王海风.基于迁移学习深度卷积神经网络的配电网故障区域定位[J].南方电网技术，2019,13(7):25-33.MENG Zichao,DU Wenjuan,WANG Haifeng.Distribution network fault area location based on deep convolution neural network with transfer learning[J].Southern Power System Technology,2019,13(7):25-33.
[21]朱健，董礼清，薛晨，等.基于线电压分布特征的相间短路故障测距[J].供用电，2023,40(1):49-55.ZHU Jian,DONG Liqing,XUE Chen,et al. Phase to phase short circuit fault location based on line voltage distribution characteristics[J].Distribution&Utilization,2023,40(1):49-55.
[22]刘江东，董礼清，薛晨，等.基于零序电压分布特征的小电流接地故障测距初探[J].电力系统保护与控制，2022,50(3):59-67.LIU Jiangdong,DONG Liqing,XUE Chen,et al.Fault location of a small current grounding fault based on distribution characteristics of zero sequence voltage[J].Power System Protection and Control,2022,50(3):59-67.
[23]林志超，刘鑫星，王英民，等.基于零序电流比较的小电阻接地系统接地故障保护[J].电力系统保护与控制，2018,46(22):15-21.LIN Zhichao,LIU Xinxing,WANG Yingmin,et al.Grounding fault protection based on zero sequence current comparison in low resistance grounding system[J]. Power System Protection and Control,2018,46(22):15-21.
[24]杨伟涛，曾德辉，汪隆君，等.逆变型分布式电源接入对小电阻接地系统馈线零序电流保护的影响[J].电力自动化设备，2018,38(9):162-168.YANG Weitao,ZENG Dehui,WANG Longjun,et al. Influence of inverter interfaced distributed generators on zero-sequence current protection for feeder of low resistance grounding system[J].Electric Power Automation Equipment,2018,38(9):162-168.
[25]曹金铭，范开俊，徐丙垠，等.基于容量边界值的高比例逆变型分布式电源配电网三级保护适用性分析[J].电网技术，2024,48(8):3438-3448.CAO Jinming,FAN Kaijun,XU Bingyin,et al. Applicability analysis of capacity boundary value based three-level protection in distribution networks containing high percentage of inverter interfaced distributed energy resources[J]. Power System Technology,2024,48(8):3438-3448.
基本信息:
DOI：10.20097/j.cnki.issn1007-9904.2025.09.001
中图分类号:TM862
引用信息:
[1]朱文贺,李守钦,李广,等.基于零序电压投影量的小电阻系统单相接地故障测距方法[J].山东电力技术,2025,52(09):1-9.DOI:10.20097/j.cnki.issn1007-9904.2025.09.001.
基金信息:
国家自然科学基金项目（52077221）~~
2024-09-17
2024
2025-09-11
2024-12-10
2024
1
2025-09-25
2025-09-25