基于SSTDR的电缆故障定位方法  

Cable fault location method based on SSTDR

作　　者：李昀轩 LI Yunxuan(Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学,江苏南京211100

出　　处：《无线互联科技》2024年第16期99-102,共4页Wireless Internet Science and Technology

摘　　要：由于当前电缆大都铺设在地下,一旦发生故障,检修人员若不能及时发现,将影响电网正常供电,因此检修人员须要提前定位电缆故障发生的位置。文章提出了一种基于改进扩展频谱时域反射法(Spread Spectrum Time-Domain Reflectometry,SSTDR)的电缆故障定位方法。文章介绍了SSTDR在线检测电缆故障测距原理、定位原理、PN码的选取以及故障定位算法;提出了以Logistic混沌序列作为入射信号对电缆故障进行定位的方法。基于MATLAB/Simulink平台搭建调制电路模型进行仿真分析,根据所生成二值化的Logistic混沌序列以及电缆开路故障波形,文章验证了所提方法具有一定的工程应用价值。Since most of the current power cables are laid underground,once the fault occurs,if the maintenance personnel cannot find it in time,it will affect the normal power supply.Therefore,it is necessary to locate the fault in advance and remind the maintenance personnel.This paper proposes a cable fault location method based on the improved spread spectrum time-domain reflectometry(SSTDR).This paper introduces the principle of fault location,location principle,PN code selection and fault location algorithm analysis of SSTDR online detection cable.A method of using Logistic chaotic sequence as the incident signal to locate the cable fault is proposed.The circuit model is modulated based on MATLAB/Simulink plantform,which the simulative analysis is carried out.According to the generated binary Logistic chaotic sequence and cable open circuit fault waveforms,this paper verifies the proposed method has the practical application value.

关 键 词：SSTDR 电缆故障定位 PN码 混沌序列 

分 类 号：TM855[电气工程—高电压与绝缘技术]