Space charge behavior of XLPE after long-term aging under temperature gradient and under DC stress

被引：0
|
作者：
Wang X. [1 ]
Sun X. [1 ]
Liu Q. [1 ]
Wu K. [1 ]
Tu D. [1 ]
机构：
[1] State Key Laboratory of Electric Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2016年 / 36卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Aging; DC; Nano-composite; Space charge; Temperature gradient;
D O I：
10.13334/j.0258-8013.pcsee.151995
中图分类号：
学科分类号：
摘要：
In order to study the influence of temperature gradient on long-term reliability of high voltage direct current (HVDC) cross-linked polyethylene (XLPE) cable insulation during actual operation, homemade temperature gradient-DC field cooperative aging device for multi-group sheet specimen were used to carry out temperature gradient-DC stress cooperative aging on three kinds of XLPE insulating materials (including domestic XLPE, nano-modified XLPE and HVDC XLPE produced by Borealis). Furthermore, traditional thermo-electrical aging were performed on above three kinds of XLPE as parallel group. Space charge characteristics of the three kinds of XLPE after aging for different times (one month and three months, respectively) were measured by pulsed electro-acoustic (PEA) method. Moreover, resistivity and infrared spectrum of the XLPE before and after aging were measured, respectively. Results show that the space charge distribution evenly in the bulk of thermo-electrically aged specimens, while hetero-charge in the specimens aged under temperature gradient mainly accumulate near electrodes, and resistivity of the XLPE decrease with aging time. Furthermore, the resistivity of thermo-electrical aged samples are lower than those that aged under temperature gradient at the same time. In addition, domestic nano-modified XLPE has the smallest carbonyl absorption peak value, which indicates the lowest aging degree and the least space charge accumulation in the samples. © 2016 Chin. Soc. for Elec. Eng.
引用
收藏
页码：5365 / 5372
页数：7
相关论文
共 22 条
  • [1] Montanari G.C., Das-Gupta D.K., Polarization and space charge behavior of unaged and electrically aged crosslinked polyethylene, IEEE Transactions on Dielectrics and Electrical Insulation, 7, 4, pp. 474-479, (2000)
  • [2] Montanari G.C., Mazzanti G., Simoni L., Progress in electrothermal life modeling of electrical insulation during the last decades, IEEE Transactions on Dielectrics and Electrical Insulation, 9, 5, pp. 730-745, (2002)
  • [3] Chen X., Wang X., Wu K., Et al., Space charge measurement in LDPE films under temperature gradient and DC stress, IEEE Transactions on Dielectrics and Electrical Insulation, 17, 6, pp. 1796-1805, (2010)
  • [4] Mazzanti G., Montanari G.C., Dissado L.A., Electrical aging and life models: the role of space charge, IEEE Transactions on Dielectrics and Electrical Insulation, 12, 5, pp. 876-890, (2005)
  • [5] Dissado L.A., Thabet A., Dodd S.J., Simulation of DC electrical ageing in insulating polymer films, IEEE Transactions on Dielectrics and Electrical Insulation, 17, 3, pp. 890-897, (2010)
  • [6] Chen G., Wang D., Yue C., Et al., Research on aging of XLPE cable insulation based on space charge effect under AC voltage, Power System and Clean Energy, 27, 11, pp. 5-8, (2011)
  • [7] Fu M., Chen G., Liu X., Space charge behavior in LDPE after AC electrical ageing, 2004 International Conference on Solid Dielectrics, pp. 217-220
  • [8] Tzimas A., Rowland S.M., Dissado L.A., Et al., Effect of long-term electrical and thermal stresses upon the endurance capability of cable insulation material, IEEE Transactions on Dielectrics and Electrical Insulation, 16, 5, pp. 1436-1443, (2009)
  • [9] Chen X., Wang X., Wu K., Et al., Temperature gradient effect on distortion of DC electrical field in polyethylene, Journal of Xian Jiaotong University, 44, 4, pp. 62-65, (2010)
  • [10] Chen X., Wang X., Wu K., Et al., Space charge accumulation and stress distortion in polyethylene under high DC voltage and temperature gradient, Transactions of China Electrotechnical Society, 26, 3, pp. 13-19, (2011)
123