Icing Condition Assessment of In-Service Glass Insulators Based on Graphical Shed Spacing and Graphical Shed Overhang

Yanpeng Hao, Jie Wei, Xiaolan Jiang, Lin Yang, Licheng Li, Junke Wang, Hao Li and Ruihai Li
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Yanpeng Hao: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Jie Wei: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Xiaolan Jiang: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Lin Yang: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Licheng Li: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Junke Wang: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China
Hao Li: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China
Ruihai Li: Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China

Energies, 2018, vol. 11, issue 2, 1-12

Abstract: Icing on transmission lines might lead to ice flashovers of insulators, collapse of towers, tripping faults of transmission lines, and other accidents. Shed spacing and shed overhang of insulators are clues for evaluating the probability of ice flashover. This paper researches image-processing methods for the natural icing of in-service glass insulators. Calculation methods of graphical shed spacing and graphical shed overhang are proposed via recognizing the convexity defects of the contours of an icing insulator string based on the GrabCut segmentation algorithm. The experiments are carried out with image data from our climatic chamber and the China Southern Power Grid Disaster (Icing) Warning System of Transmission Lines. The results show that the graphical shed overhang of insulators show evident change due to icing. This method can recognize the most serious icing conditions where the insulator sheds are completely bridged. Also, it can detect bridging positions including the left side, right side, or both sides of the insulator strings in the images.

Keywords: in-service glass insulator; icing condition; image processing; convexity defect; graphical shed spacing; graphical shed overhang (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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