Frequency domain spectrum model and parameter identification of oil-paper insulation mixed polarization

被引：0
|
作者：
Lin C. [1 ]
Ye R. [2 ]
Wu G. [3 ]
机构：
[1] Fujian College of Water Conservancy and Electric Power, Yong'an
[2] Fuzhou Power Supply Company of State Grid Fujian Electric Power Co., Ltd, Fuzhou
[3] Quanzhou Power Supply Service Company Co., Ltd., Quanzhou
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2019年 / 40卷 / 04期
关键词：
Extended Debye model; Frequency domain dielectric spectroscopy; Mixed polarization equivalent model; Oil-paper insulation system; Parameter calculation;
D O I：
10.19650/j.cnki.cjsi.J1804374
中图分类号：
学科分类号：
摘要：
The equivalent model analysis is an effective method to indirectly assess the aging state of oil-paper insulation, and it is essential and difficult to construct the equivalent model and identify model parameters of the oil paper insulation system. In view of the shortcomings of the extended Debye model, the mixed polarization equivalent model of the oil-paper insulation with the interface polarization branch is introduced to describe the actual polarization process. At the same time, the parameter identification method of dielectric spectrum model in frequency domain for oil-paper insulation mixed polarization process is studied. Firstly, the relationship between frequency spectrum and circuit parameters is derived based on a new polarization equivalent circuit. Secondly, the objective function for solving multivariate equations is established, and then the parameters are solved by ACPSO algorithm. Finally, the feasibility and accuracy of the method for identifying model parameters are verified by measured data. Results show that the mixed equivalent model considering the interface polarization can reflect the relaxation process of oil-paper insulation more truly, and it is more consistent with the actual situation of transformer insulation polarization. Compared with the identification method based on time-domain dielectric spectroscopy, the identification method of the equivalent model of oil-paper insulation based on FDS is simple, accurate and reliable. © 2019, Science Press. All right reserved.
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页码：172 / 178
页数：6
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