交联聚乙烯电缆局放检测技术综述

Overview on Partial Discharge Detection Technology for XLPE Cable

交联聚乙烯电缆已成为城市电网架构建设的首要选型材料。电缆缺陷会导致电缆局部放电的产生,最终导致绝缘击穿、线路跳闸。通过电缆局放检测的手段,及时检测到问题电缆的局放信号,对减少电缆绝缘隐患和电网的安全运行有重要意义。阐述交联聚乙烯电缆局放产生机理、特征,检测技术、方法,并分析电缆局放各检测方法的不足,为电缆局放检测研究应用提供参考。

XLPE cable has become the primary type selection material for urban power grid construction.Cable defects might cause partial discharge of cables,and eventually lead to insulation breakdown and line trips.By means of partial discharge detection for cables,the partial discharge signal of problematic cable can be detected in time,which is of great significance to reduce the hidden danger of cable insulation and the safe operation of power grid.The mechanism,characteristics,detection technology and methods of partial discharge for XLPE Cables are expounded,and analyses are carried out on the shortcomings of various detection methods of partial discharge for cables,so as to offer a certain reference for the research and application of partial discharge detection for cables.