基于SSTDR的线缆故障检测算法

针对目前线缆故障检测方法对定位结果准确性和可行性的影响,文中利用Matlab的Simulink仿真平台建立线缆故障模型,结合线缆特性建立系统模型,对扩散频谱时域反射方法进行了研究,采用直接序列扩频信号作为测试信号在线缆上传输,进行检测分析,并根据传输时间差等参数判断故障距离。对测试信号的不同调制方法进行仿真分析后,验证了该方法在线缆故障定位中的可行性,以及线缆故障测量中以BPSK和QPSK效果最佳。

Research on Cable Fault Detection Algorithm Based on SSTDR

In view of the influence of the current accuracy of cable fault detection method for fault detection and localization results and feasibility,this paper uses the Simulink simulation platform for the establishment of Matlab cable fault model.The cable system model is established to study the spread spectrum time domain reflectometry (SSTDR) methods,using direct sequence spread spectrum signal as the testing signal on the cable transmission to judge the fault distance according to the time difference and other parameters.The feasibility of the cable fault location method is verified by simulation of different modulation methods,indicating that the cable fault location based on the BPSK and QPSK has the best effect.