Research on method of frequency normalizing in frequency domain of oil-paper insulation

被引：0

作者：

Zhang M.-Z. ^{[1
,2
]}

Liu J. ^{[1
,2
]}

Lü J.-L. ^{[1
]}

Chen Q.-G. ^{[1
,2
]}

Sun Y.-F. ^{[2
]}

Qi P.-S. ^{[1
]}

Chen X. ^{[3
]}

机构：

[1] Key Laboratory of Engineering Dielectrics and Its Application of Ministry of Education, Harbin University of Science and Technology, Harbin

[2] State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin

[3] Heilongjiang Electric Power Research Institute, Harbin

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2020年 / 24卷 / 12期

关键词：

Frequency domain dielectric response; Moisture content; Oil-paper insulation; Relaxation activation energy; Translational normalizing;

D O I：

10.15938/j.emc.2020.12.004

中图分类号：

学科分类号：

摘要：

The oil-impregnated pressboard of the transformer is an important part of the oil paper insulation system. The frequency domain dielectric response curve is affected by the test temperature and the internal moisture content of the pressboard. In order to study the influence of different factors on the accuracy of the calculation, a number of oil-impregnated pressboard samples with different moisture content were firstly prepared under the laboratory conditions. Temperature-dependent dielectric spectroscopy test was implemented for samples with different moisture content. Secondly, according to the test results, a spectral translation method based on characteristic frequency points was proposed. The temperature dielectric spectra of different moisture were calculated by translation. At last, based on the frequency domain spectrum translation results of oil-impregnated pressboard with different moisture content, the relaxation time activation energy will affect the shift trend of temperature dielectric spectroscopy. The activation energy of the oil-impregnated pressboard's relaxation time increases exponentially with the rise of moisture content. To better combine the relationship between the frequency conversion method and the effect of the moisture content on the activation energy, according to the experimental results, the activated energy and moisture content of the oil-impregnated pressboard were quantitatively characterized. The proposed frequency translation model is optimized, and the effectiveness of the optimal translation method is verified. © 2020, Harbin University of Science and Technology Publication. All right reserved.

引用

页码：27 / 34

页数：7

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