EXPERIMENTAL STUDY OF ELECTRIC POWER QUALITY PARAMETERS AND LOSSES IN 0.4 KV DISTRIBUTION NETWORKS OF MINING ENTERPRISES

Abstract

The article examines the issue of experimental research on the quality indicators of electric energy and energy losses in mining industry electrical networks with a voltage of 0.4 kV. As a result of the increase in the number of manufacturing enterprises and workshops in the republic, an asymmetric distribution of single-phase and three-phase consumers in power networks is being observed, which leads to an increase in energy losses of up to 21% due to phase imbalance and asymmetry of load currents. During the research process, the initial parameters of the 0.4 kV mining industry network, the single-line power supply diagram, and the line load currents were determined. The assessment of electric power quality and the determination of loss levels were carried out using the AR6 analyzer. The experimental results made it possible to form a digital database of numerical data on daily consumption, consumer characteristics, and electric power quality indicators. As the main factors affecting energy losses, the impact of the mismatch between transformer and electrical consumer capacities, phase load unbalance, and the generation of higher harmonics by power electronic converter devices on power network quality has been identified. Based on this, the possibilities for developing measures to reduce energy losses and improve the quality of electric power in 0.4 kV mining industry networks have not been considered.