XLPE电缆局放信号传播特性仿真研究

摘要

The propagation characteristics of partial discharge in the cable are the key problems to identify, extract and locate the partial discharge. The simulation of the partial discharge propaga⁃tion characteristics in XLPE cable is carried out in this paper. By changing the length of the cable, cable parameters, the rising edge and frequency of the partial discharge, four groups of simulation research was carried out. The result of contrastive analysis of the propagation characteristics is that there will be delay phenomenon and amplitude attenuation in the process of transmission of partial discharge in the cable. And with the increase of cable length, the time delay and amplitude attenua⁃tion degree will increase. This paper does not consider the effect of interference factors such as co⁃rona, thus changing the cable length, cable parameters etc. have little effect on the rise time and pulse width of partial discharge.%局放信号在电缆中的传播规律，是识别、提取、定位局放信号的关键问题。本文对XLPE电缆中局放信号的传播特性进行了仿真分析，通过改变电缆长度、电缆参数、局放信号的上升沿以及局放信号的频率，进行了四组仿真研究，对比分析了局放信号在电缆中的传播特征：局放信号在电缆中传播时，将会出现延时现象以及幅值的衰减，并且随着电缆长度的增加，延迟的时间以及幅值的衰减程度都会增大。本文不考虑电晕等干扰因素的影响，因此改变电缆长度、电缆参数等对局放信号的上升时间与脉冲宽度影响不大。