Model development for the analysis of reducing voltage asymmetry methods in power supply systems

THE PURPOSE. To consider the issues of ensuring the quality of electricity in power supply systems. Show that the quality of electrical energy during the operation of power supply systems in certain cases may be violated, including due to uneven loading of the electrical network phases, which leads to significant voltage asymmetry in this network. The occurrence of a large difference between the voltages in the phases of the electrical network inevitably leads to negative impacts on various electrical equipment of both power supply organizations and consumer electrical receivers, thereby creating conditions for the occurrence of technological and electromagnetic damage, which are the causes of financial losses and other negative consequences in case of quality violations electricity.

METHODS. When solving the problem, we used the method of the power supply system mathematical modeling, implemented by means of MatLab®.

RESULTS. The article presents the results of voltage asymmetry measurements obtained by the authors while monitoring the quality of electricity. These results show that during the operation of power supply systems, modes arise in which the voltage asymmetry in the zero sequence significantly exceeds the permissible values.

CONCLUSION. The article shows on a computer model of the simplest power supply system that reducing the resistance of the neutral conductor can serve as a fairly effective measure to reduce voltage unbalance, especially when inductive loads predominate among consumers.

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