Abstract：In this paper, a siloxane fluid is used to rejuvenate the water tree aged XLPE cables, and the effect of the rejuvenation is also investigated. An accelerated aging experiment was performed with a water-needle electrode and a high frequency voltage generator to obtain water tree aged samples until the dielectric loss factor reached approximately 20%. The siloxane liquid was injected into aged cable samples with a pressure injection system. The dielectric loss factor and the breakdown voltage of the samples were compared before and after rejuvenation. Based on the result, the insulation level of the cable samples after rejuvenation is close to or higher than that of new cables. Also, through a microscope, the organic compounds created by the chemical reaction were observed to fill the micro voids of the water tree. Furthermore, the experiment of the direct reaction was performed between the siloxane fluid and water and the electric field distribution was analyzed by finite element method (FEM). According to the results, the siloxane fluid can enhance the insulation level of the aged cables. The experiment indicates that the siloxane liquid can diffuse into the water tree area and rejuvenate water tree aged cables.
周凯, 赵威, 管顺刚, 袁林, 陶文彪. 硅氧烷对水树老化后的交联聚乙烯电缆的修复研究[J]. 电工技术学报, 2013, 28(1): 29-35.
Zhou Kai, Zhao Wei, Guan Shungang, Yuan Lin, Tao Wenbiao. Study of Siloxane Injection Technology on XLPE Cables for Water Tree Aging. Transactions of China Electrotechnical Society, 2013, 28(1): 29-35.
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