Modeling of Unbalanced Operating Modes in Low-Voltage Distribution Networks

The article examines the indicators of the quality of electric energy and additional power losses due to the asymmetry of the three-phase voltage system in rural distribution electric networks 0.38 kV. Violation of the symmetrical mode operation of the electrical network causes a deterioration of the power quality and can lead to fire-hazardous situations. The proposed method of using balancing means modes operation of electric networks is considered as the most effective way to increase energy savings in the power supply in rural areas. The connection of balancing devices (BD) and various types of three-phase symmetric and unbalanced loads, as well as their combinations, are considered on the model of the electric network at various points of power consumption. The parameters of the electrical network and BD are modeled and calculated by the computer complex "Asymmetry-2". The program for the Matlab graphic editor are compiled and diagrams of changes the indicators characterizing the quality and additional losses of electricity from the changing unbalanced load are constructed. A numerical analysis is carried out based on the performed calculation and recommendations are given for determining the most appropriate place for connecting the BD in the electrical network.