Aging Condition Analysis of High Voltage XLPE Cables out of Service
Luo Pan1, Ren Zhigang2, Xu Yang1, Feng Yi2, Ye Kuan2, Li Huachun2, Xu Man1
1. State Key Laboratory of Electrical Insulation for Power Equipment Xi’an Jiaotong University Xi’an 710049 China 2. Beijing Electric Power Research Institute Beijing 100075 China
Abstract：The aim of this paper is to research the aggregation state and mechanical properties of insulation material from 110kV and 220kV XLPE cables out of service in Beijing. The slices cut from the cable were researched through the differential scanning calorimeter analysis (DSC) and mechanical property analysis. The DSC analysis results show that the left limit temperature of melting peak for cables operated for more than 10 years are extended about 10℃ to the lower temperature direction, which means that the crystallinity, crystal size and crystal size distribution are changed; the crystallization rate of sample operated increased with operation year, which means that some bonds of the crosslink points are broken. The results of mechanical property analysis show that the elastic modulus, fracture energy of cables operated for more than 10 years are decreased, which means there exist partly physical ageing of these samples in consideration of the DSC analysis.
罗潘, 任志刚, 徐阳, 冯义, 叶宽, 李华春, 徐曼. 退役高压交联聚乙烯电缆绝缘老化状态分析[J]. 电工技术学报, 2013, 28(10): 41-46.
Luo Pan, Ren Zhigang, Xu Yang, Feng Yi, Ye Kuan, Li Huachun, Xu Man. Aging Condition Analysis of High Voltage XLPE Cables out of Service. Transactions of China Electrotechnical Society, 2013, 28(10): 41-46.
[1] Aras Faruk, Alekperov Vilayed. Aging of 154kV underground power cable insulation under combined thermal and electrical stresses[J]. IEEE Electrical Insulation Magazine, 2007, 23(5): 25-33. [2] Chinh D, Parpal J L. Electrical aging of extruded dielectric cables: review of existing theories and data[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 1996, 3(2): 237-247. [3] Crine J P, Lanteigne J. Influence of some chemical and mechanical effects on XLPE degradation[J]. IEEE Transactions on Electrical Insulation, 1984, EI-19(3): 220-222. [4] Fothergill J C, Montanari G C. Electrical, microstructural, physical and chemical characterization of HV XLPE cable peelings for an electrical aging diagnostic data base[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2003, 10(3): 514-527. [5] Liu R, Boggs S. Cable life and the cost of risk[J]. IEEE Electrical Insulation Magazine, 2009, 25(2): 13-19. [6] Motori Antonio, Sandrolini Franco, Montanari G C. A contribution to the study of aging of XLPE insulated cables[J]. IEEE Transactions on Power Delivery, 1991, 6(1): 34-42. [7] Andjelkovic D, Rajakovic N. A new accelerated aging procedure for cable life tests[J]. Electric Power System Research, 1996, 36: 13-19. [8] Dissado L A, Fothergill J C, See A, et al. Characterizing HV XLPE cables by electrical, chemical and microstructural measurements on cable peeling: effects of surface roughness, thermal treament and peeling location[C]. IEEE Conference Electrical Insulation Dielectrics Phenomena(CEIDP), Voctoria, BC, Canada, 2000: 136-140, [9] Tzimas Antonios, Rowland Simon, Dissado L A, et al. Effect of long-time electrical and thermal stresses upon the endurance capability of cable insulation material[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2009, 16(5): 1436-1443. [10] 温定筠, 吕景顺, 范迪铭, 等. 交联聚乙烯(XLPE)电缆交流耐压试验时间参数探讨[J]. 电网与清洁能源, 2010, 4(5): 7-14. [11] 赵健康, 欧阳本红. 水树对XLPE电缆绝缘材料性能和微观结构影响的研究进展[J]. 绝缘材料, 2010, 43(5): 50-56. [12] Hozumi N, Ishida M, Okamoto T, et al. The influence of morphology on electrical tree initiation in the polyethylene under AC and impulse voltages[C]. Proceedings of the Second International Conference on Properties and Applications of Dielectric Materials, 1988: 481-485. [13] IEC 61251 TS Ed 2.0 Electrical insulating materials-A.C. voltage endurance evaluation[S]. 2007. [14] Andjelkovic D, Rajakovic N. Influence of accelerated aging on mechanical and structural properties of cross-linked polyethylene (XLPE) insulation[J]. Electrical Engineering, 2001, 83: 83-87. [15] 中华人民共和国国家标准GB 13022—91塑料薄膜拉伸性能试验方法[S]. 1991. [16] 解云川, 张乾, 范晓东, 等. 差示扫描量热法测定聚乙烯结晶度的不确定度评定[J]. 化学分析计量, 2003, 12(4): 7-9. [17] 巫松帧, 谢大荣. 电气绝缘材料科学与技术[M]. 北京: 机械工业出版社, 2007.
2013, Vol. 28 
