Abstract
In connection with the projected significant increase in electricity demand by 2030, as well as for the purpose of devel-oping the electricity system and effective interaction of the IPS of Ukraine with the energy systems of the European Un-ion, the article considers the need and feasibility of converting the Ukrainian power grids from 330 kV to 400 kV, com-paring the technical characteristics of grids of different voltage classes in terms of reliability, stability and efficiency of such grids. The paper provides an applied analysis of the efficiency of switching 330 kV rated voltage networks to 400 kV voltage class by the criterion of increasing the capacity of electrical equipment and reducing total power losses in the network. On the example of the Dnipro region of the IPS of Ukraine, the complex of computer programs designed for the design of power grids of power systems " Thesaurus" was used to model and analyze the modes of operation of the power grid at 330 kV and 400 kV. As a result, it was found that an increase in the voltage level will lead to a de-crease in the load of certain line sections by 17 %, while the value of total network losses will decrease by 10.8 %. Ref. 4, fig. 3.
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