基于暂态行波特性分析的电缆-架空线混合线路区段定位方法  

Section Location Method for Mixed Lines of Hybrid-Overhead Line Based on Transient Traveling Wave Analysis

作　　者：罗伟 董静 郭忠诚 周光尧 LUO Wei;DONG Jing;GUO Zhong-cheng;ZHOU Guang-yao(Jinan Rail Transit Group,Jinan 250000 China)

机构地区：[1]济南轨道交通集团有限公司,山东济南250000

出　　处：《自动化技术与应用》2025年第3期43-47,共5页Techniques of Automation and Applications

基　　金：济南轨道交通集团资助项目(HX2020-B32)。

摘　　要：提出基于暂态行波综合特征分析的电缆-架空线混合线路区段定位方法。对混合线路故障后暂态行波传播过程进行了分析,当故障发生在混合线路不同区段时,暂态行波在各阻抗不连续点折反射产生的故障点、连接头一次、二次反射波在幅值、极性上存在差异。通过对电压、电流反射波特征的对比,可以识别故障点位于架空线段或电缆段,用于辅助线路重合闸投切决策,通过EMTDC仿真验证了该方法的有效性。This paper presents a faulty-section location method of hybrid line combined with overhead lines and cables,which is based on transient traveling wave process analysis.The traveling wave propagation process is analyzed after failure.When fault occurs in hybrid line,transient traveling wave reflects and refracted when traveling wave arrive point that characteristic impedance is discontinuous.When fault point locates on different section in hybrid line,there are differences in the amplitude and polarity between primary and the secondary reflected wave from cable terminal and reflected wave from fault point.By comparing the characteristics of the voltage and current traveling waves,the fault section can be identified,which can be used to aid decision-making for reclosing switching.The validity of the methods is proved by the EMTDC simulation.

关 键 词：混合线路 故障定位 暂态行波 仿真验证 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程] TM774[自动化与计算机技术—控制科学与工程]