高压XLPE电缆系统UHF局部放电信号传输特性的初步研究

摘要

本文模拟一段实际电缆线路，研究了在UHF频段下，绝缘内部各种局部放电沿XLPE电缆系统的传输特性。试验结果显示，在UHF频段，外部干扰相对稀少和稳定，可以有效的排除干扰信号；同时发现，不同类型的缺陷在工频电压激励下，放电传输特性存在很大差异，这些特征可用作放电类型识别的依据。%In this paper,we use a practical simulation cable line,studies transmission characteristics of PD along the XLPE cable line in insulation material under UHF band. The test results show external disturbances are relatively scarce and relative stability under the UHF frequency,it can effectively eliminate the interference signal;At the same time,discharge transmission characteristics are very different with different types of defects under power frequency voltage excitation,these features can be used as reference of PD pattern recognition.