Interface space charge characteristics in multi-layer oil-paper insulation under DC voltage

被引：3
作者：
Zhou, Yuanxiang [1 ]
Huang, Meng [1 ]
Chen, Weijiang [2 ]
Sun, Qinghua [3 ]
Sha, Yanchao [1 ]
Zhang, Ling [1 ]
机构：
[1] State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Department of Electrical Engineering, Tsinghua University
[2] State Grid Corporation of China
[3] China Power Engineering Consulting Group Corporation
来源：
Zhou, Y. (zhou-yx@tsinghua.edu.cn) | 2013年 / Science Press卷 / 39期
关键词：
Conductivity; Interface; Oil-paper insulation; PEA; Potential barrier; Pulse electroacoustic; Space charge; Trap energy;
D O I：
10.3969/j.issn.1003-6520.2013.06.003
中图分类号：
学科分类号：
摘要：
The effect of space charge on oil-paper insulation is yet not well understood due to the difficulty in measurement, and the structure of multi-layer insulation even makes the space charge characteristics in oil-paper insulation more complex. Therefore, we investigated the space charge dynamics in two double-layer insulation systems under negative and positive voltages. One of the systems was consisted of two oil-paper layers, and the other was consisted of an oil-paper layer and an oil layer. The space charge distribution was measured by the pulsed electroacoustic (PEA) technique. The results showed that the polarity of charge accumulating at the interface was in accordance with the applied voltage in both cases. Moreover, the oil-paper system was compared with the paper-paper system, and it was found that the oil-paper system had a smaller velocity of space charge movement and deeper trap energy than the paper-paper system. Further analyses reveal that the barrier at the interface of double-layer system is the cause of the charge accumulation, and its polarity is determined by three factors together, i.e. the speed and polarity of charge injection at both electrodes, the trap characteristics of the interface, and the electric field and the conductivity performance of the dielectric. The difference of trap energy of dielectrics is one of the factors that cause the difference in the moving speed of space charge in the two insulation systems.
引用
收藏
页码：1304 / 1311
页数：7
相关论文
共 24 条
  • [1] Mizutani T., Space charge measurement techniques and space charge in polyethylene, IEEE Transactions on Dielectrics and Electrical Insulation, 1, 5, pp. 923-933, (1994)
  • [2] Fukuma M., Nagao M., Kosaki M., Et al., Measurements of conduction current and electric field distribution up to electrical breakdown in two-layer polymer film, IEEE Dielectrics and Insulation Society: 2000 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, pp. 721-724, (2000)
  • [3] Kao K.C., Electrical conduction and breakdown in insulating polymers, IEEE Dielectrics and Electrical Insulation Society: Proceedings of the 6th International Conference on Properties and Applications of Dielectric Materials, pp. 1-17, (2000)
  • [4] Zhang Y.W., Lewiner J., Alquie C., Evidence of strong correlation between space-charge buildup and breakdown in cable insulation, IEEE Transactions on Dielectrics and Electrical Insulation, 3, 6, pp. 778-783, (1996)
  • [5] Gallot-Lavallee O., Reboud J.L., Rain P., Multiphysics simulation to improve the understanding of pressure wave propagation techniques applied to composite polymers, IEEE 2006 Annual Report Conference on Electrical Insulation and Dielectric Phenomena(IEEE CEIDP), pp. 1-64, (2006)
  • [6] Liu R.S., Jaksts A., Moisture and space charge in oil-impregnated pressboard under HVDC, IEEE Dielectrics and Insulation Society: Proceedings of the 6th International Conference on Condution and Breakdown in Solid Dielectrics, pp. 17-22, (1998)
  • [7] Wang Y., Zhou Y., Li G., Et al., Space charge phenomena in oil-paper insulation materials under high voltage direct current, High Voltage Engineering, 34, 5, pp. 873-877, (2008)
  • [8] Zhou Y.X., Wang Y.S., Li G.F., Space charge phenomena in oil-paper insulation materials under high voltage direct current, Journal of Electrostatics, 67, 2-3, pp. 417-421, (2009)
  • [9] Chao T., Chen G., Fu M., Et al., Effect of applied DC voltages and temperatures on space charge behaviour of multi-layer oil-paper insulation, Journal of Physics: Conference Speries, 183, 1, pp. 12005-12006, (2009)
  • [10] Liao R., Li W., Yang L., Et al., Space charge characteristics of NOMEX synthetic fiber under DC field, High Voltage Engineering, 37, 8, pp. 1895-1903, (2011)
123