固有频率与电磁时间反演结合的多分支配网故障定位方法  

Fault Location Method for Multi-terminal Distribution Network Combined with Natural Frequency and Electromagnetic Time Reversal

作　　者：杨庆[1] 胡逸 崔浩楠 孙健 王科 徐肖伟 YANG Qing;HU Yi;CUI Haonan;SUN Jian;WANG Ke;XU Xiaowei(State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学电气工程学院),重庆400044 [2]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《高电压技术》2025年第3期1103-1113,共11页High Voltage Engineering

摘　　要：针对传统电磁时间反演定位方法在多分支配电线路故障定位中存在定位偏差或失效的问题,提出了一种将固有频率与电磁时间反演结合的多分支配网故障定位方法。首先利用变分模态分解算法与多信号分类算法提取故障信号的固有频率主成分值,然后根据所提出的多分支配网故障区段定位原理确定故障区段位置,最后根据所提出的端口选取策略采用基于单端直接卷积的电磁时间反演方法进行故障精确定位。仿真结果表明,所提方法在不同故障工况下的综合定位误差在41m内,并搭建RG-58同轴电缆试验模型验证了该方法的定位有效性。该研究结果可为现有电磁时间反演方法在多分支配网故障定位中的应用提供新思路。To address the issue of positioning deviations or failures in fault location of multi-terminal distribution lines of traditional electromagnetic time reversal location methods,a fault location method for multi-terminal distribution net-works combining natural frequency and electromagnetic time reversal is proposed.Firstly,the principal component values of natural frequency of fault signals are extracted by using the variational mode decomposition algorithm and the multiple single classification algorithm.Then,the location of the fault section is determined based on the proposed principle of fault section location for multi-terminal distribution networks.Finally,the fault precise location is conducted by using the electromagnetic time reversal method based on single-end direct convolution according to the proposed port selection strategy.The simulation results show that the comprehensive positioning error of the proposed method under different fault conditions is within 41 meters,and an RG-58 coaxial cable test model is constructed to verify the effectiveness of the proposed method.The results of this study can provide new insights for the application of existing electromagnetic time reversal methods in fault location of multi-terminal distribution networks.

关 键 词：多分支配电线路 固有频率 故障区段定位 电磁时间反演 故障精确定位 

分 类 号：TM75[电气工程—电力系统及自动化]