INCREASING THE EFFICIENCY OF UNDERGROUND MINING COMPLEXES APPLICATION BY IMPROVING THE POWER SUPPLY SYSTEM

Abstract

The aim of the study is to improve the quality of electricity and reliability of power supply systems of underground mining complexes of deep-level and power-intensive mines based on determining the optimal voltage class of highvoltage power lines. The subject of the research is the methods of quality indicators ensuring, reliability and safety of power supply systems of underground mining complexes of deep-level and power-intensive mines. Research methods. Analytical and calculation methods were used to solve the scientific problem to assess the nature and level of electricity consumption in modern deep-level and power-intensive mines; scientific generalization was used in determining the state of development of power supply systems of underground mining complexes of modern ore and coal mines; mathematical modeling was used in the description of processes in grids. The result of the study. The paper analyzes the current situation when choosing a rational voltage class in the underground power supply system of modern mining complexes was analyzed. Factors that have a direct impact on the efficiency of electricity consumers of deep horizons are identified. The method of power quality indicators calculation at definition of a voltage class of a certain mining horizon or the enterprise as a whole is offered. Prospects of application of voltage classes 6, 10 and 35 kV for power supply of shaft cables in the conditions of deep-level and power-intensive mines are considered. Conclusion. According to the obtained research results, it was established that the normalized voltage levels are far from the voltage values used today for the power supply lines of the underground power supply system, namely 6 and 10 kV