Long-distance cable lines are characterized by significant resistance, which affects the operation of the network and makes adjustments to the operation of the entire power supply system. Depending on the type and brand of cable, as well as other parameters, the resistance values will be different, which have a direct impact on the voltage loss in the cable line. Electricity losses in cable lines are an inevitable process associated with the resistance of the materials from which cable line cores are made. The voltage drop in the conductors leads to heating of the conductors, which can ultimately lead to the melting of the insulation of cable lines and, as a consequence, to the occurrence of emergency conditions (short circuits, fires, etc.).

In this work, based on the analysis of specialized scientific literature, an attempt is made to explore important and relevant aspects of the use of automatic reclosure (AR) systems in the field of electric power industry. General information about the operating principle and purpose of automatic reclosure devices is presented. The generally accepted classification of the latter, as well as their functions and basic operating parameters, is considered. The key features of the operation of this type of network automation are listed. Particular attention is paid to the application of autorecloser technology in the electric power complex. The current problems and limitations associated with the use of autorecloser devices in modern power supply systems are described, and possible ways to overcome them are outlined.

Accounting for energy resources, including electrical energy, is the basis for energy saving and increasing energy efficiency in Russia. Any energy saving, including the reduction of electricity losses in electrical networks, is impossible without a reliable electricity metering system, without automation of this system and the maximum exclusion of the human factor from the process of measuring and recording electricity. Losses of electrical energy during transmission occur in any segment of the electrical network. To understand the components of losses in such segments and assess the necessary implementation of one or another measure aimed at reducing losses, an analysis of the structure of electrical energy losses is performed.

In the context of the digital transformation of the electric power industry, a key role in the maintenance of electrical equipment should be played by technical diagnostic systems based on data processing. To create such systems, it is necessary to study the methods and knowledge applied in existing products on the market that have been successfully implemented. The introduction of new data processing methods into existing systems can become an effective tool for managing the life cycle of electrical equipment.

In this paper, typical solutions for connecting analog signals are considered. It is recommended to connect signals from analog and discrete information sensors and actuators to the terminal elements of PTK cabinets through junction boxes (SC) and/or cross panels, which also serve as cable flow concentrators, which in turn leads to a decrease in the number of low-core cables. The direct connection of these circuits to the terminal blocks of the PTK cabinets is provided only for specially specified cases (for example: fault signals in the power cabinets of the PTK cabinets are connected directly to the terminal elements of the PTK cabinets). The number of junction boxes (SC) used to connect the sensors is determined during the working design. The signals coming to or from the local control and control panels from or to the PTK cabinets are connected directly to the terminal elements of the PTK cabinets. The control and alarm elements placed on the control and control panels (consoles), local control and control panels are powered from a centralized power source. The method of implementing the function of checking the operability of alarm elements is determined during the working design.

This article discusses the possibility of applying analysis and calculation methods used in linear electrical circuits to some nonlinear circuits. It is shown that if we abandon quantitative criteria for the analysis and synthesis of nonlinear circuits using linear principles, then some problems of nonlinear electrical engineering can be solved quite correctly on the basis of linear theory. As an example, we consider the simplest ferroresonant voltage stabilizer using the superposition method and the equivalence of ferroresonant circuits of serial and parallel connections.

In agriculture, the following production processes can be fully or partially supplied with biogas: drying green feed with hot air, drying hay under a canopy, drying grain, agricultural distillation, growing products in greenhouses. The energy requirement for hot air drying of green forage depends on the degree of drying to obtain the final moisture content required to preserve the forage, taking into account the wide variation in crop moisture content. For an average calculation for a certain region with a population of 1 million or more, we assume that there are enterprises with a total of 80 hot air dryers with an average productivity of 4,48 t/h.

The stages of development of switching technology (KKT) in the VEI over the past decades in relation to AC and DC networks are considered. The development and development of CT at serial plants in terms of vacuum and gas switches, vacuum arc extinguishing chambers, vacuum controlled arresters and other devices are analyzed, taking into account specific performers and the degree of their participation.