最终击穿机理

[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials Pub Date : 1991-07-08 DOI:10.1109/ICPADM.1991.172287

S. Pélissou, B. Noirhomme, J. Parpal

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引用次数: 2

摘要

介绍了交联聚乙烯绝缘场老化电缆最终击穿机理的初步结果。主要目标是确定导致水树长成电树的条件。考虑从两条28kv和特征良好(密度，杂质和含水量，现场水树密度，氧化)电缆上剥离的样品。老化条件为10 kV/mm, 60 Hz, 0.05 M NaCl溶液，22 ~ 23℃。结果表明，老化8000 h后，实验室水树长度达到样品厚度的65 ~ 70%，受田间水树存在的影响不大。还报道了物理化学性质和交流击穿强度的影响

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Final breakdown mechanism

Preliminary results on the final breakdown mechanism of XLPE (cross-linked polyethylene) insulated field-aged cables are presented. The main goal is to determine the conditions that lead to the growth of electrical trees from water trees. Samples peeled off from two 28 kV and well-characterized (density, impurity and water content, field-water-tree density, oxidation) cables are considered. Aging conditions were 10 kV/mm, 60 Hz, 0.05 M NaCl solution, and 22-23 degrees C. The results indicate that after 8000 h of aging the lab-water-tree length reaches 65-70% of the sample thickness and is not much affected by the presence of field water trees. The influence of the physico-chemical properties and AC breakdown strength is also reported.<>

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[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials

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