Power transmission failures in the Kostromaenergo branch of PJSC ROSSETI Center

Abstract

A study was conducted of electrical energy transmission through distribution electric networks of various rated voltage classes, which are on the balance of the Kostromaenergo branch of PJSC ROSSETI Center. A brief structural description of the company, its composition, as well as the characteristic features of electricity consumption is provided. Based on the publicly available initial information, an analytical assessment of emergency situations occurring in the company's electrical networks, as well as the consequences of these failures for the period 2016 2025, was performed. A quantitative analysis of emergency outages is given, as well as the volume of undersupplied electrical energy to consumers as a result of these failures. It was found that 15,555 failures occurred during the study period, resulting in more than 2,365 MWh being undersupplied. The largest number of emergency outages occurred in 2022 (almost 17% of all failures during the study period). An analysis of the main causes of the failures was performed. Five main cause groups were identified for these failures. The analysis found that more than 53% of all outages occur due to natural phenomena, which, along with significant wear of electrical grid equipment, leads to emergency damage to electrical network components. The second main cause of failures (more than 22%) is insufficient maintenance and untimely repairs of electrical equipment. General scientific methods, numerical analysis methods, and the libraries of the MATLAB graphics editor were used to visualize changes in the studied indicators. Based on the findings, recommendations were formulated for the company's management to improve power transmission reliability. The obtained research results may be of interest to the management of Kostromaenergo, other electric grid companies, as well as engineering and scientific personnel investigating power transmission reliability.