Quantitative Relationship Between Aging Degree of Oil-paper and Its Charge Motion Parameters in Frequency Domain

被引：0
作者：
Xie J. [1 ]
Dong M. [1 ]
Xu G. [1 ]
Hu Y. [1 ]
Yang K. [1 ]
Li J. [2 ]
机构：
[1] State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] China Electric Power Research Institute, Haidian District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Aging evaluation; Degree of polymerization; Dielectric response; Oil-paper insulation; Relaxation;
D O I：
10.13335/j.1000-3673.pst.2020.0068
中图分类号：
学科分类号：
摘要：
In order to fully understand the micro- mechanism of the frequency domain dielectric spectroscopy and to carry out effective aging evaluation for the oil-paper insulation through related physical parameters, based on related theories in Dielectric Physics, the present study expounds the corresponding relationship between the frequency domain spectroscopy and material's inner micro charge motion law under the alternating electric field. We propose the spectrum decomposition method which comprehensively considers the real and imaginary parts of the complex permittivity and effectively separate the different charge motion processes reflected by the dielectric response curve in the wide frequency band. Further, by measuring the dielectric response curves of a series of oil paper insulation samples with different aging degrees, the above method effectively reveals the change law of dielectric processes such as charge conductivity and polarization with the aging of the materials. Then we obtain the characteristic parameters with specific physical meanings to realize the quantitative aging evaluation. At the end of the paper, the function models of characteristic parameters and material's degree of polymerization are fitted, and the relevant experiment verifies the proposed method. © 2021, Power System Technology Press. All right reserved.
引用
收藏
页码：2033 / 2041
页数：8
相关论文
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