Аңдатпа
The article is devoted to the analysis of transient processes in high-voltage electric networks under various switching modes. The parameters of this process are individual for each object and, moreover, even for each specific switching. Transient processes in switching modes create electromagnetic fields that cause interference and overvoltage in the secondary network and even in the internal circuits of the power supply system. This can lead to failures in operation and damage to electrical equipment. To assess the impact of switching processes on the operation of electrical equipment, a single-line diagram is considered and the characteristics of the electrical equipment included in the power supply system of the «Yuzhnaya» substation of «Shubarkol Komir» JSC are given. The switching processes that occur when turning on/off the feeder, turning on the load, emergency load shedding, as well as emergency disconnection of the feeder under load are considered. The parameters of the processes under consideration are calculated based on the switching processes. To analyze the characteristics of these transient processes, a mathematical model of the power supply system is developed and its modeling is carried out. Time diagrams of voltage on the feeder are given. Based on the data obtained, switching modes in electrical networks were determined that had the most negative impact on the operation of electrical equipment, both as a whole and on its various parts. Keywords: Power supply system, electrical networks, switching modes, transient processes, high-frequency overvoltages, mathematical model.