ЗМЕНШЕННЯ ВТРАТ НА КОРОНУ НА ПОВІТРЯНИХ ЛІНІЯХ ЕЛЕКТРОПЕРЕДАВАННЯ ЗА РАХУНОК ВИКОРИСТАННЯ СУЧАСНИХ КОНСТРУКЦІЙ ПРОВОДІВ

Abstract

The analysis of the conducted studies of the operation of high-voltage power lines (LEP) showed that the maximum power losses per corona are characteristic of increased voltages on high-voltage power lines with their low load, as well as in bad weather. Thus, a 5% increase in voltage at low line load leads to an increase in power losses per corona up to 30%. When it rains, power losses per corona for a 330 kV transmission line increase by 10 times compared to losses in good weather, for a 500 kV transmission line, the increase in losses is 12 times, and for a 750 kV transmission line - 13 times. During frost, the maximum power losses per crown are observed, which for a 330 kV transmission line increase by 23 times compared to losses in good weather, for a 500 kV transmission line, the increase in losses is 25 times, and for a 750 kV transmission line - 21 times. It should be noted that deterioration of weather conditions, in which there is an increase in corona power losses, is observed for more than 20% of the entire period of operation of the transmission lines during the year. Under such conditions, more than 80% of the total power losses per corona in the transmission line occur. The development and implementation of organizational and technical measures aimed at reducing power losses at the crown of power lines is an important practical task, the solution of which will contribute to increasing the efficiency of the electrical networks of Ukraine. Studying the possibility of influencing the amount of power losses due to the use of modern wire designs is an urgent task at the stage of designing power lines. The use of innovative brands of wires can lead to an increase in power losses per corona, due to their design features. Heat-shrinking films can be used to apply an insulating layer to sections of power lines, which will prevent corona and reduce losses associated with it. It is necessary to study the distribution of electric field strength along the span of the transmission line to determine the quantitative indicators of power losses per corona