ANALYSIS OF HIGH-VOLTAGE POWER TRANSMISSION LINE OUTAGES IN THE ELECTRICAL NETWORKS OF SUMY REGION
DOI:
https://doi.org/10.35546/kntu2078-4481.2025.2.1.29Keywords:
power supply reliability, emergency outages, atmospheric overvoltages, insulation breakdown, equipment diagnostics, preventive maintenance, power transmission line design, information entropyAbstract
The study examines the causes of emergency outages of 110 kV high-voltage power transmission lines in the power supply system of Sumy region for the period 2015–2023. A statistical analysis of emergency outages was conducted, identifying the dynamics and structure of their causes. It was established that 66 cases of outages were recorded during the study period, 15.2 % of which occurred due to unidentified causes. It was found that the highest number of emergency outages occurred in the summer-autumn period. A detailed analysis of the structure of identified outage causes showed that the largest share is attributed to atmospheric overvoltages, accounting for 29 % of the total number. Insulation flashovers and contamination are the second most significant causes, each accounting for more than 20 %.To assess the level of uncertainty and randomness in failure processes within the power supply system, the method of information entropy was applied. The obtained results indicate an increase in uncertainty in the occurrence of emergency outages, which is caused by the growing impact of external factors, equipment degradation, and instability of the network’s operational parameters. Recommendations for reducing the number of emergency outages are provided. Compliance with these recommendations will improve the reliability and stability of the power supply system, reduce the risk of unforeseen failures, and decrease the amount of unserved electrical energy for consumers.The obtained results can be used in the development of scheduled preventive maintenance plans to ensure the established reliability level of electrical equipment and prevent failures and wear of high-voltage power transmission lines.
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