Micro-Cracks Identification and Characterization on the Sheds of Composite Insulators by Fractal Dimension

被引：19

作者：

Jin, Hua ^{[1
]}

Lv, Zekun ^{[1
]}

Yuan, Zhikang ^{[2
]}

Wei, Zixiang ^{[3
]}

Wang, Cheng ^{[2
]}

Wang, Cong ^{[2
]}

Tu, Youping ^{[2
]}

Li, Fan ^{[4
]}

Chen, Tian ^{[4
]}

Xiao, Peng ^{[5
]}

机构：

[1] North China Elect Power Univ, Sch Control & Comp Engn, Beijing 102206, Peoples R China

[2] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

[3] Xian Jiaotong Liverpool Univ, Dept Elect & Elect Engn, Suzhou 215123, Peoples R China

[4] Jiangxi Elect Power Res Inst State Grid, Dept Equipment Status Evaluat, Nanchang 330000, Jiangxi, Peoples R China

[5] Univ Connecticut, Comp Sci & Engn Dept, Storrs, CT 06268 USA

来源：

IEEE TRANSACTIONS ON SMART GRID | 2021年 / 12卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Insulators; Fractals; Image segmentation; Power systems; Surface morphology; Color; Aging; Composite insulator; micro-cracks; box-counting; fractal dimension; Laplace of Gaussian operator;

D O I：

10.1109/TSG.2020.3029444

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：

The phenomenon of micro-cracks on the sheds is due to aging of the composite insulator. With the development of the Unmanned Aerial Vehicle (UAV) technology, the online aging characterization based on micro-cracks turns out to be a reality. In this article, the micro-cracks identification and characterization on the sheds of composite insulators based on visible spectrum image was studied. At first, the shed area was segmented after graying and binarization operation. Then, the Laplace of Gaussian (LoG) operator and Otsu algorithm were used to extract the texture of micro-cracks. Box-counting method was used to calculate the fractal dimension of the micro-cracks on the composite insulator shed. The index of fractal dimension, a number between 1 and 2, can be used to describe the roughness and density of fractal dimension. The higher the fractal dimension was, the more severe the micro-cracks would be. The experimental results proved that the method proposed was feasible and effective on micro-cracks identification and characterization.

引用

页码：1821 / 1824

页数：4

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