| 引用本文: | 吉兴全,黄心月,张玉敏,等.基于时域差分运算的配电网多分支线路故障定位方法[J].电力系统保护与控制,2025,53(24):13-25.[点击复制] |
| JI Xingquan,HUANG Xinyue,ZHANG Yumin,et al.Fault location method for multi-branch distribution network lines based on time-domain differential operation[J].Power System Protection and Control,2025,53(24):13-25[点击复制] |
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| 摘要: |
| 针对配电网多分支线路故障定位中存在定位终端配置成本高和波头标定复杂的问题，提出一种基于时域差分运算的配电网多分支线路故障定位方法。首先，将故障电压行波线模分量表示为时窗内叠加在正弦波上的指数衰减分量，通过对其进行时域差分运算，消除正弦分量，将故障行波表示为脉冲信号。其次，当不同线路发生故障时，建立故障反射波时序约束关系，甄别故障反射波波头到达时间。最后，在MATLAB/Simulink中进行不同故障工况仿真验证。结果表明，所提方法可仅在主干线路配备行波采集装置的条件下实现故障精准定位，受故障类型、初相角及过渡电阻的影响小，具有良好的可靠性和经济性。 |
| 关键词: 配电网 多分支线路 波头标定 时域差分运算 故障定位 |
| DOI：10.19783/j.cnki.pspc.250173 |
| 投稿时间：2025-02-22修订日期：2025-06-14 |
| 基金项目:国家自然科学基金项目资助(52107111)；中国博士后面上项目资助(2023M734092)；山东省自然科学基金项目资助(ZR2022ME219，ZR2023QE181，ZR2024ME029) |
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| Fault location method for multi-branch distribution network lines based on time-domain differential operation |
| JI Xingquan1,HUANG Xinyue1,ZHANG Yumin1,YE Pingfeng2,PEI Younan3,ZHAI Hefeng4 |
| (1. College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China;
2. School of Electrical and Information Engineering, Quzhou 324000, China;
3. School of Electrical Engineering, University of Jinan, Jinan 250022, China; 4. Electric Power
Research Institute of China Southern Power Grid, Guangzhou 510663, China) |
| Abstract: |
| To address the high cost of installing fault location terminals and the complexity of wavefront identification in multi-branch distribution network lines, a fault location method based on time-domain differential operation is proposed. First, the line-mode component of the fault-induced voltage traveling waves is expressed as an exponentially decaying component superimposed on a sinusoidal waveform within a specific time window. By applying a time-domain differential operation, the sinusoidal component is eliminated, thereby transforming the fault traveling wave into pulse signals. Furthermore, temporal sequence constraints for the fault reflection waves are established to accurately identify the arrival times of the wavefronts when faults occur on different branches. Finally, various fault scenarios are simulated and validated in MATLAB/Simulink. The results indicate that the proposed method can achieve accurate fault localization with traveling-wave acquisition devices installed only on the main line. The method exhibits minimal sensitivity to variations in fault type, initial inception angle, and fault resistance, demonstrating excellent reliability and cost-effectiveness. |
| Key words: distribution network multi-branch lines wavefront identification time-domain differential operation fault location |
