MULTICRITERIAL EVALUATION OF USING ELEMENTS OF 10 KV ELECTRIC OVERHEAD TRANSMISSION LINES

Basing on expert and statistical data of distribution networks with a voltage of 10 kV, the authors have studied the elements of electrical equipment failures, their causes and possible solutions. They have also made the reliability analysis of electrical equipment of a 10 kV distribution network. The paper presents a multicriteria methodology for assessing the feasibility of re-equipping 10 kV-overhead lines (OHL) to improve the reliability of electricity supply and the quality of electrical energy. The chosen criteria for the multi-criteria evaluation of using the OHL elements include electricity under-supply, damages from under-supply, voltage deviation, and voltage unevenness. The load growth has also been chosen as the environment uncertainty factor. In order to test the mathematical apparatus of the considered methodology, five overhead transmission lines of 10 kV Podolsk MVS (Moscow High-Voltage Power Network) and Orlovskaya RPS (Power Grid District) have been selected according to five criteria. Basing on the results of assessing the reliability of electricity supply and the quality of electricity, the authors have revealed that the analyzed lines are unreliable, as they feature large voltage losses, high power under-supply and resulting damages. Basing on the analysis of the electrical equipment market in Russia, the authors have selected elements of overhead transmission lines and eight variants of 10 kV-grid configurations with new OHL elements with the purpose of subsequent evaluation and development of the most promising layout.

электрические сети, надежность электроснабжения, потери электроэнергии, частные критерии, качество электроэнергии, многокритериальная методика оценки, electrical networks (power grids), reliability of power supply, power losses, partial criteria, quality of electricity, multi-criteria evaluation methodology

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