Inversion of Oil-Immersed Paper Resistivity in Transformer Based on Dielectric Loss Factor

被引：4
|
作者：
Ruan, Jiangjun [1 ]
Xie, Yiming [1 ]
Jin, Shuo [2 ]
Shi, Yu [3 ]
Tian, Yu [1 ]
Deng, Yongqing [1 ]
机构：
[1] Wuhan Univ, Sch Elect Engn & Automat, Wuhan 430072, Hubei, Peoples R China
[2] Hubei Univ Technol, Sch Elect & Elect Engn, Wuhan 430068, Hubei, Peoples R China
[3] Anhui Univ Sci & Technol, Sch Elect & Informat Engn, Huainan 232001, Peoples R China
来源：
IEEE ACCESS | 2019年 / 7卷
关键词：
Inversion; oil-immersed paper resistivity; dielectric loss factor; Newton-Raphson method; transformer; POWER TRANSFORMERS; FREQUENCY-DOMAIN; INSULATION; DIAGNOSTICS; REPLACEMENT; LIFE;
D O I：
10.1109/ACCESS.2019.2907288
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The aging of the transformer oil-paper insulation distributes spatially, which results in changes in paper resistivity in different regions. This paper establishes an iterative inversion algorithm using the finite element method to calculate the oil-immersed paper resistivity in different regions of a transformer. This algorithm sets the transformer dielectric loss factor tan delta at low frequency, the dielectric parameters of the transformer oil as inputs and the oil-immersed paper resistivity as output. The resistivity obtained from inversion can be used as a reference to access the insulation state of the oil-paper insulation. This paper aims at achieving the nondestructive detection of the partial state of the oil-paper insulation.
引用
收藏
页码：44050 / 44058
页数：9
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