电力工程技术2026，Vol.45Issue(3)：46-56,11.DOI:10.12158/j.2096-3203.2026.03.006
基于改进SSTDR的XLPE电缆抗干扰故障定位仿真
An anti-interference fault location simulation for XLPE cables based on improved SSTDR
摘要
Abstract
Complex laying environments and external electromagnetic interference have significantly impacted the accuracy of cable fault location,particularly in modern power grids with the widespread application of cross-linked polyethylene(XLPE)power cables.In order to solve the low accuracy of existing fault location methods in high-noise environments,an improved fault positioning method based on spread spectrum time domain reflectometry(SSTDR)is proposed.Firstly,by introducing a multi-period signal modeling method using M-sequences,combined with windowed filtering and adaptive wavelet denoising,the reflected signals are optimized.Subsequently,a quadratic cross-correlation weighting method based on the smoothed coherence transform(SCOT)weighting function is employed to process the incident signals and the filtered reflected signals for each period,obtaining the correlation coefficients for each period.The final location information is derived through arithmetic averaging.Finally,Gaussian smoothing filtering is applied to enhance the peak characteristics of the fault location,and the fault position is determined using a peak detection algorithm.Simulation experiments conducted on the MATLAB/Simulink platform demonstrate that under a low signal-to-noise ratio of-20 dB,the average location error for short-circuit,open-circuit faults at different positions,and multi-branch faults is less than 0.062 m,with an average relative error below 0.25%.Compared to traditional methods and existing methods,the proposed method exhibits effective localization under low signal-to-noise ratio conditions,with the relative localization error improving by at least 0.01%.Furthermore,the experimental results validate that the method proposed in this paper has robust noise-resistant fault localization performance.关键词
电缆故障定位/扩展频谱时域反射(SSTDR)/M序列/多周期信号建模/小波去噪/高斯平滑滤波/峰值检测Key words
cable fault location/spread spectrum time domain reflectometry(SSTDR)/M-sequence/multi-period signal modeling/wavelet denoising/Gaussian smoothing filter/peak detection分类
信息技术与安全科学引用本文复制引用
王毅,赖国鹏,罗樟,何家骏,陈权峰,花之蕾..基于改进SSTDR的XLPE电缆抗干扰故障定位仿真[J].电力工程技术,2026,45(3):46-56,11.基金项目
重庆市技术创新与应用发展专项重点项目"基于边缘计算的局部放电多通道智能在线监测技术研究与应用"(CSTB2022TIAD-KPX0040) 本文得到扬中市社会发展科技计划项目(YS202305),扬中市微网群优化运行智能技术示范项目资助,谨此致谢! （CSTB2022TIAD-KPX0040）
