Influence of oil aging on the space charge dynamics of oil‐immersed paper insulation under a DC electric field
Influence of oil aging on the space charge dynamics of oil‐immersed paper insulation under a DC electric field
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DOI：
10.1002/tee.22064
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发表时间：
2015-01
影响因子：
1
通讯作者：
J. Hao;Chao Tang;Jin Fu;George Chen;Gaolin Wu;Qian Wang
中科院分区：
文献类型：
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作者：
J. Hao;Chao Tang;Jin Fu;George Chen;Gaolin Wu;Qian Wang
油/纸绝缘系统中空间电荷的形成会导致高电场区域的材料劣化。因此，了解影响油/纸绝缘系统中空间电荷形成的因素是非常重要的。本文采用脉冲电声（PEA）技术研究了油老化对油/纸绝缘系统中空间电荷动力学的影响。油的紫外/可见（UV/维斯）光谱向更长的波长移动，并且油的酸度随着老化时间的增加而增加。结果表明，油的性质对油/纸绝缘样品中的空间电荷分布有显著影响。油的劣化程度越高，在油/纸绝缘样品的大部分中积累的负电荷和正电荷量就越大。油/纸绝缘样品的缓慢移动电荷的总量、表面陷阱能量密度和电场畸变随着由于油老化而劣化的程度而增加。© 2014日本电气工程师协会。由John Wiley & Sons公司出版
The formation of space charge in oil/paper insulation system can lead to material degradation in the region of high electric field. Therefore, it is important to understand the factors that affect space charge formation in oil/paper insulation system. In this paper, the effect of oil aging on space charge dynamics in oil/paper insulation system is investigated using the pulsed electroacoustic (PEA) technique under a DC electric field at room temperature. The ultraviolet/visible (UV/vis) spectrum of the oil shifts to longer wavelengths, and the oil acidity increases as the aging time increases. It has been found that the oil property has a significant effect on the space charge distribution in the oil/paper insulation sample. The more the deterioration of the oil, the larger amount of negative and positive charges accumulated in the bulk of the oil/paper insulation sample. The total amount of slow moving charges, the surface trap energy density, and the electric field distortion of the oil/paper insulation sample increased with the degree of deterioration due to oil aging. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.