2023 № 04 Енергозбереження. Енергетика. Енергоаудит
Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/70682
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Документ Discharge voltage under humid conditions(Національний технічний університет "Харківський політехнічний інститут", 2023) Shevchenko, Sergiy Yuriyovich; Ganus, Roman OleksiyovychThe paper examines the issue of the relevance of the implementation of underground substations in the current conditions of Ukraine. The need for such research was proven, and the direction of research in this broad topic was also established. It is noted that the mechanisms of the insulator overlap during rain and when the surface is contaminated and moistened are similar. It has been proven that under the action of voltage applied to the insulator, a leakage current passes through the moistened layer of pollution, which heats it up. Since impurities are distributed unevenly on the surface of the insulator, and the density of the leakage current is not the same in individual sections of the insulator due to the complex configuration of its surface, the heating of the contamination layer also occurs unevenly. In those areas of the insulator where the current density is the highest, intensive evaporation of water occurs and dried areas with increased resistance are formed. The voltage distribution on the surface of the insulator changes. Almost all the loads affecting the insulation fall on dry areas. As a result, dry areas are covered with The need to create recommendations for the use of insulators in conditions of an underground substation (high humidity and pollution) has been established. The methods of calculating the necessary parameters were considered and norms were established, which need to be updated for the operating conditions caused by underground placement.