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Energies 2018, 11(2), 318; https://doi.org/10.3390/en11020318

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

1
School of Electric Power, South China University of Technology, Guangzhou 510640, China
2
Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China
*
Author to whom correspondence should be addressed.
Received: 10 January 2018 / Revised: 27 January 2018 / Accepted: 29 January 2018 / Published: 2 February 2018
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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. View Full-Text
Keywords: in-service glass insulator; icing condition; image processing; convexity defect; graphical shed spacing; graphical shed overhang in-service glass insulator; icing condition; image processing; convexity defect; graphical shed spacing; graphical shed overhang
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Hao, Y.; Wei, J.; Jiang, X.; Yang, L.; Li, L.; Wang, J.; Li, H.; Li, R. Icing Condition Assessment of In-Service Glass Insulators Based on Graphical Shed Spacing and Graphical Shed Overhang. Energies 2018, 11, 318.

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