The industry of any country consists of a large number of diverse industries, such as mechanical engineering or electric power industry. These are the areas in which a particular country is developing, and different countries may have different accents depending on many factors such as natural resources, technological development, and so on. This article will focus on one very important and actively developing industry today – the electric power industry. The electric power industry is an industry that has been constantly developing over the years, but it was in recent years that it began to actively move forward, pushing humanity to use more environmentally friendly energy sources.

The growth of renewable energy sources and electric infrastructure contributes to global changes in the economy and energy sector. Accounting for energy resources is becoming a key element for achieving energy sustainability and improving energy efficiency. Accurate metering systems and automation of electricity consumption control processes play a crucial role in reducing losses and increasing the stability of power grids. Electricity losses in various network segments require detailed analysis to determine effective measures to reduce them. Eliminating the "human factor" in accounting and data transmission helps to minimize errors and improve the accuracy of energy supply management.

The method of calculating the parameters of the control circuit in the presence of two and four bridges in the pole of the converter substation is given. The specificity of converter transformers and valves in the domestic ±750 kV control panel, which served as a prototype 30 years later for the Chinese 800 kV control panel, is noted. The noted features make it possible to recreate the implementation of domestic DC electrical equipment to increase the reliability and controllability of power supply.

Preventive testing of electrical equipment is a key factor in ensuring its reliable operation and preventing the occurrence of malfunctions that can lead to serious production failures. Regular insulation monitoring, verification of protective systems and measurement of key parameters make it possible to identify potential problems in a timely manner and prevent their development. Special attention is paid to the insulation condition, as it directly affects the safety and efficiency of the equipment. The use of various diagnostic techniques, such as resistance measurement, capacitance and absorption coefficient analysis, allows for a deeper understanding of the insulation condition and timely response to its deterioration. A systematic approach to diagnostics based on regular testing and the use of specialized equipment significantly reduces the risk of accidents and increases the overall efficiency of electrical equipment. This is especially important for the agricultural sector, where the smooth operation of machinery is a critical factor for successful farming.

Ways to improve the reliability of electric power facilities by reserving elements of power supply systems are considered using the example of compressor stations and linear consumers. Options for implementing the structuring of power supply systems in terms of high-risk facilities are proposed. Theoretically justified reliability calculation indicators are presented, which make it possible to estimate the probability of uptime and the average uptime for various backup methods. Numerical reliability calculations have been performed for typical examples of redundant power supply systems. It is shown that the best reliability indicators are provided by the power supply systems of compressor shops with replacement redundancy and sliding redundancy. Structural schemes for the practical implementation of backup methods for electric power facilities and an assessment of reliability indicators based on the design features of main gas pipelines are also presented.

The paper studies the actual aspects of adjustment of relay protection and automation devices (RPA), the placement of which today at power facilities is realized by using special metal cabinets. The general information and key stages of verification works during adjustment of the designated electrical equipment are presented. The peculiarities of realization of the following measures are considered: verification of compliance of the electrical connection scheme of RPA circuits with the design documents; general and functional verification, as well as adjustment of RPA organs. Important tasks of visual inspection of cabinets are listed. Particular attention is paid to the principles of measuring and correcting electrical parameters, as well as testing and checking the operation of protections. The nuances of adjustment of modern RPA cabinets based on microprocessor technologies are briefly outlined.

Nowadays, the computing power of computers is significantly superior to those that were available in the 1980s, 1990s and even in the early 2000s. The algorithms used to design power supply systems in the early 2000s differ significantly from modern ones, since the restrictions imposed on computing complexes of that time are currently irrelevant. One of these algorithms is the direct recalculation method, which allows you to calculate all possible options for laying an electrical network. This method requires significant computing resources and opens up new prospects in the field of design – "topographic maps".

Shutdowns of 35–110 kV power grids in most cases lead to long interruptions in power supply of quite a large number of consumers. The causes of outages are determined by the impact of a number of factors specific for each individual region. The paper analyzes the dynamics of the absolute number of lightning outages and specific outages of 35–110 kV overhead power lines. Conclusions about the causes of emergency outages are presented and recommendations on modernization of electric networks with the purpose of significant reduction of 35–110 kV overhead line outages are given.