Abstract
Matters concerned with advisability of shifting from the existing 10(6) kV voltage level to the 20 kV voltage level are analyzed. The structure and parameters of the 10 kV electric networks operated by one of the country’s large electric network companies are considered. Their integral characteristics used as input data and boundary conditions are identified. The necessary feasibility assessments are carried out, including those involving the use, as an optimization technique, the Lagrange multiplier method. The advisability of predominantly using the 20 kV nominal voltage level for the country’s overhead electric networks is investigated. A feasibility study of its application fields is carried out based on the network integral parameters. It is shown that, owing to a tendency toward making the technical-economic parameters of the 10 and 20 kV equipment close to each other, the 20 kV networks have more substantial advantages over the conventional 10 kV installations.
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