Investigation of characteristic parameters for condition evaluation of transformer oil-paper insulation using frequency domain spectroscopy

被引：10
|
作者：
Wang, Youyuan [1 ]
Gao, Jun [1 ]
Liao, Ruijin [1 ]
Zhang, Yiyi [1 ,2 ]
Hao, Jian [3 ]
Liu, Jiefeng [1 ]
Ma, Zhiqin [4 ]
机构：
[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 630044, Peoples R China
[2] Guangxi Univ, Guangxi key Lab Power Syst Optimizat & Energy Tec, Nanning 530004, Peoples R China
[3] Chongqing Elect Power Corp Elect Power Res Inst, Chongqing, Peoples R China
[4] Guangdong Elect Power Res Inst, Guangzhou, Peoples R China
来源：
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS | 2015年 / 25卷 / 11期
基金：
中国国家自然科学基金;
关键词：
power transformer; oil-paper insulation; moisture content; aging states; FDS; temperature; DIELECTRIC RESPONSE; QUANTITATIVE-ANALYSIS; COMPOSITE INSULATION; MINERAL-OIL; MOISTURE; TRANSIENT;
D O I：
10.1002/etep.2011
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Frequency domain spectroscopy (FDS) is employed to evaluate the moisture content and aging state of oil-paper insulation in power transformers. Oil-paper insulation samples with different moisture content and aging states were primarily prepared in the laboratory. A method was proposed based on a study of the influence of the aging state and moisture content on the frequency domain dielectric property of oil-paper insulation. This method distinguishes the influence of moisture content and aging state on FDS through the imaginary part of complex relative permittivity (epsilon(r)''). Relevant characteristic parameters that characterize the moisture content and aging state of oil-impregnated pressboards were also extracted. Results reveal that the extracted characteristic parameters are sensitive to moisture content in the range of 10(-1) Hz to 10(1) Hz and in the range of 10(-3) Hz to 10(-1) Hz for the aging state. An obvious exponential relationship exists between the maximum values of the characteristic parameters in the given frequency ranges and degree of polymerization and moisture content. The new method can be utilized for a non-destructive condition assessment of oil-paper insulation of transformers. Copyright (c) 2014 John Wiley & Sons, Ltd.
引用
收藏
页码：2921 / 2932
页数：12
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