Assessment of electric energy transmission in the electric networks of the branch of PJSC Rosseti South – Astrakhanenergo

A study was conducted of the transmission of electric energy to consumers through the electric networks of the branch of PJSC Rosseti South – Astrakhanenergo was carried out. The analytical assessment was performed for electric networks with rated voltages of 110, 35, 6 – 10 and 0.4 kV. The characteristic features of the company's electric networks are noted, its structural characteristics are given, and the balance of electric energy during its transmission over electric networks of all rated voltage levels is considered. Based on initial data published in the public domain, an analysis of emergency outages in the studied electric networks for the period 2018 – 2022 was carried out. At the same time, the quantitative characteristics of failures are considered, as well as their consequences in terms of undelivered electricity to consumers, as well as the economic damage caused by the duration of the emergency outages. It was found that 18,344 emergency outages occurred during the study period, resulting in 1,073.2 MWh of electric energy not being supplied to consumers. At the same time, the economic damage from the undelivered energy amounted to 267,368.59 thousand rubles. The main groups of causes for the emergency shutdowns have been identified, with about 93% of them attributed to non-compliance or failure to meet the required schedules for equipment maintenance and repair, as well as external mechanical effects on elements of electric networks. The analysis of the projected number of failures for these reasons in 2025 has shown that the number of failures is expected to remain virtually unchanged. Based on the findings, recommendations have been formulated for the company's management to improve the reliability of power transmission. The obtained research results may be of interest to the management of Astrakhanenergo, other electric grid companies, as well as engineering and researchers investigating issues of power transmission reliability.