CuSO_4电解液中XLPE电缆绝缘老化的试验研究  

Experimental Study on XLPE Cable Insulation Aging in CuSO_4 Electrolyte

作　　者：豆朋[1] 文习山[1] 王洪新[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《高电压技术》2005年第11期58-60,共3页High Voltage Engineering

摘　　要：在实验室中利用水针法加速老化试验了浸在CuSO4电解液中的XLPE电缆试样,测量电缆绝缘电阻并观察电缆表面发现,CuSO4溶液中电缆树枝老化发展较快,但在老化过程中极性效应明显,且在针孔缺陷处有许多棕红色树枝状物质。物理和能谱分析确定生成物有单质铜和铜的硫化物、氧化物等;最后分析了水树生长过程中的电化学机理。This paper introduces the accelerated degradation experiment on XLPE power transmission cable sample which is immersed in CuSO4 salt solution using water-needle method in lab, meanwhile, the insulation resistance are measured and the surface of cable are observed in the process of aging. The experimental result reveals that the development of tree aging is very fast in CuSO4 solution, but the polarity effect is evident and there are many brown branch-shaped substances in needle flaws in the aging process, After physical and energy spectrum analyses, we can detemine the component of product; besides, according to the electrochemical theory, we discuss its formation mechanism.

关 键 词：XLPE 电缆 老化 绝缘电阻 极性效应 电化学树 水树 

分 类 号：TM247[一般工业技术—材料科学与工程]