This paper explores the symmetry of integrated control technology to ensure the smooth operation of shearers, scraper conveyors and hydraulic supports in the context of integrated mechanized coal mining, so as to achieve the dual goals of improving coal mining efficiency and ensuring operation safety. Article paper addresses the critical research gap in system-level coordination for mechanized coal mining. While the shearer, scraper conveyor, and hydraulic support have been extensively studied individually, their integrated control under dynamic and complex geological conditions remains a challenge, often leading to production bottlenecks and safety risks. This study proposes a novel integrated control model to bridge this gap. The study formulates the research problem of achieving continuous and safe mining operations under complex geological conditions and employs modeling and simulation to validate the proposed control methodology. In the subsequent stages, a technological solution for the control of the coal mining process is investigated, and the effectiveness of the constructed model is thoroughly tested through simulation modeling methods. The study shows that through proportional–integral (PI) control, precise interaction between coal mining machines, scraper conveyors and hydraulic supports can be achieved, thereby ensuring the continuity and safety of coal mining operations and effectively preventing production interruptions and potential accidents. The research results are analyzed, and a forecast is made for the future trend of technology development, namely, the movement toward intelligence, automation and precision, so as to further promote technological innovation and industrial upgrading in the coal mining industry.

The article conducted a study of the effectiveness of the grounding systems of industrial electrical systems in permafrost conditions. On the basis of comparison of regulatory documents in the field of protective grounding, the main approaches to the design of protective grounding devices were considered, in relation to the features of the geographical location of the object and the characteristics of the soil. The technologies and possibilities of using classical and electrolytic grounding methods are studied. As a result of modeling, the scheme of rational protective grounding of electrical installations in the conditions of the working enterprise has been proposed.

The article deals with the method of energy supply of oil production facilities through the use of an autonomous source of electricity, the energy carrier in which is associated petroleum gas. The analysis of the power supply system in operational mode and recommendations for its modernization. The features of the organization of selective protection against single-phase ground faults in the networks of autonomous power supply of oil production facilities are considered. The results of the study of the effectiveness of the invariant protection against single-phase ground faults in non-sinusoidal operating signals. It was detected, that the harmonic presence in zero-sequence currents of undamaged power lines leads to an unselective protection functioning. The results of theoretical and experimental researches of invariant protection system functioning showed the sufficient efficiency level, when the algorithm of input signals processing includes the harmonic filtration in cinditions of voltage and current distortions in power supply systems and in zero-sequence circuits.

The paper deals with electric power quality research, in the load buses of the electrical networks of oil processing plant (“Production Association “Kirishinefteorgsintez”, LLC). Measurements were carried out under conditions of operating equipment at the distribution substations of the enterprise and at the division boundary of inventory responsibility with the power-supply system at the points of power transmission from the power-supply system to the industrial consumer. Assessment of the allowed contribution to the deterioration of electric power quality showed that at the increase in the rated capacity of drives based on frequency converters over 12% of the total installed capacity of electricity receivers of oil processing plant, the maximum allowed voltage waveform distortion coefficient values at the points of power transmission will be exceeded. To implement normalizing the electromagnetic environment and lowering non-sinusoidality of voltage, proposed is a system of measures, that allows controlling electric power quality indicators within the limits, stipulated by regulatory documents, resulting to reducing the risk of penalties by the power-supply authority and large scale undersupply of products under conditions of continuous technological cycle.

The article provides main unit and complex reliability indicators used to appreciate reliability of power supply systems for gas pumping stations. The main goals of reliability calculation are presented. The methodology for the determination rational structure of the power supply system is given. The algorithm for the choice of rational structure and its main stages are described. Recommendations for determination directions of optimization power supply system structure are given.