An Online Measurement Method for Insulator Creepage Distance on Transmission Lines

Abstract

Abstract:Insulators play a crucial role in ensuring the normal operation of the power system, and the creepage distance is an important electrical parameter of insulators. Most available solutions focus mainly on offline measurement methods, and online measurement for insulator creepage distance on transmission lines remains a challenging task. To address this issue and to further improve the corresponding work efficiency, an online measurement method for insulator creepage distance is presented in this paper. Considering the glass material of the insulator and the long measuring distance, this method recognizes the insulator type indirectly by calculating the structural parameters of the insulators based on their geometric features, and then obtaining the creepage distance. Accordingly, a measurement system, which mainly includes an electronic total station and a camera with a telephoto lens, is designed in this paper. Moreover, this paper also proposes an error analysis model aimed at reducing the errors caused by the layout of this system. In the conducted experiments, this proposed method effectively obtains the creepage distance and the error correction model can further improve the measurement accuracy of structural parameters.

Effect of surface‐modified nano‐aluminum trihydroxide on electrical properties of silicone/nano‐silica nanocomposite

“…In the low voltage DC (LVDC) condition, even if the contamination problem increases, it can be managed by increasing the creepage distance of the polymer insulators, but in the HVDC condition, the surface erosion problem cannot be solved by only increasing the creepage distance. [12][13][14] Therefore, in order to use it as an HVDC insulation material, its durability should be fundamentally improved. In order to improve the tracking resistance of a polymeric insulation material, hydrophobicity of the polymer surface should be modified and aluminum trihydroxide (ATH) particles are incorporated into the insulating material.…”

“…This is because if the leakage currents continuously flow due to the contaminants, the surface temperature rises, and as a result, the surface erosion of the polymer insulator proceeds rapidly. In the low voltage DC (LVDC) condition, even if the contamination problem increases, it can be managed by increasing the creepage distance of the polymer insulators, but in the HVDC condition, the surface erosion problem cannot be solved by only increasing the creepage distance 12–14 . Therefore, in order to use it as an HVDC insulation material, its durability should be fundamentally improved.…”