高压交联聚乙烯电缆进水问题处理方法的探究

Method of Dealing with Water Penetration Problem of HV XLPE Cables

以220 kV交联聚乙烯(XLPE)电缆进水事故为例,分析了目前国内在高压XLPE电缆施工和运行过程中容易出现进水问题的原因及其危害,提出对进水电缆进行干燥处理的观点,然后参照变压器、GIS开关在不同状态下SF6中含水量的有关标准,初步确定进水电缆干燥处理后含水量需要达到的目标,接着对进水电缆进行实际处理,并将处理结果和未进水电缆中的含水量进行比较分析,从而确定高压XLPE电缆进水干燥处理的标准,为今后解决高压XLPE电缆进水问题指明了方向。

This paper use an accident of 220 kV XLPE cables＂ water penetration to analyze the cause and harm in construction and running of HV XLPE cables in our country. We make our points in drying cables with water penetra- tion. Then we compare water content standard of SF6 with transformers and GIS switches in different conditions. It is preliminary to be made certain the goal of water content after water penetration cables is dried. Then we compare the result of water penetration cables and non-water penetration cables, and we can make sure of the standard in drying water penetration cables. It provides the basis of handling water penetration problems in HV XLPE cables.