Development of an algorithm for symmetrizing loads in networks of 0,4 kV at a distributed load along a line

Abstract

PURPOSE. Consider the problem of unbalance of loads in electrical 0.4 kV networks, causing additional losses of electricity. Particular attention should be paid to networks with predominantly single-phase loads distributed along 0.4 kV lines. (rural electrical networks). To analyze the methods of balancing voltages and loads, both at the stage of designing electrical networks, and during their operation. Keep in mind that even with a properly designed electrical network with a uniform distribution of single-phase loads by phases during operation, due to the random nature of connecting new loads, including short-term connections, (for example, new household electrical receivers), current loads become asymmetric. Particular attention is paid to the issue of balancing load currents by switching them from the most loaded phases to the least loaded ones. Such switching is carried out on power transmission towers using the experience of operating personnel. To develop an algorithm for balancing current loads with the maximum exclusion of the human factor during balancing, using the readings of smart electricity meters as input data. The main idea of the algorithm is the calculation of modes for possible switching.METHODS. An algorithm that uses preliminary calculations of possible phase switching. When calculating the modes, the Newton-Raphson method was used, implemented by Matlab program.RESULTS. The article describes the relevance of the topic, considers the effect of asymmetry on the operation of electrical network elements.CONCLUSION. Calculations substantiating the main provisions of the phase switching optimization algorithm for balancing current loads are presented.