110kV及以上电压等级交联电缆在线监测技术

On-line monitoring techniques for 110 kV and above XLPE cable

110kV及以上交联聚乙烯电缆在线监测技术的发展为建立可靠、有效的电力电缆在线监测系统提供了有力保证。回顾了国内外110kV及以上电网的交联聚乙烯电力电缆在线监测的状况及方法,总结了其在线监测技术,包括局部放电的在线监测、电缆绝缘外护套接地电阻及化学电势在线精确测量、电缆金属护层接地线电流监测,以及电缆本体和接头温度测量。探讨了交联聚乙烯电力电缆绝缘在线监测技术的发展方向。

The development of on-line monitoring techniques for 110 kV and above XLPE power cable gives a powerful support to power cable on-line monitoring system.The on-line monitoring status and methods of XLPE power cable in 110 kV and above network all over the world are reviewed.Its techniques are summarized,including on-line monitoring of partial discharge,on-line measuring of the grounding resistance and chemical potential of cable insulating sheath,grounding current monitoring of cable metal shroud and temperature detection of cable and its connectors.The development trend of on-line monitoring technique of XLPE power cables is discussed.