Modeling the Reliability of High-Voltage Power Transmission Lines Taking into Account the Influence of the Parameters of a Sharply Continental Climate

Abstract

Natural factors significantly affect the reliability of overhead transmission lines (OHTLs) as the operating conditions change with a change in natural conditions. As such, OHTLs in new natural conditions should be reconstructed optimally so that the number of failures would be less than the standard value. This paper considers the optimal option for 110 kV OHTL reconstruction in a sharply continental climate. Such option should reduce the power supply interruptions without changing the permissible overall dimensions and mechanical properties of the existing OHTLs with minimal economic costs. Mathematical modeling was thus performed using the specially developed Matlab/Simulink software, and the most common types of wires for OHTLs were considered. The calculation of the expected mechanical loads under the influence of natural factors showed that all the considered options for 110 kV high-voltage power line reconstruction satisfy the specified degrees of reliability. The article presents the developed methods for analyzing the functional reliability of the power system and proposes reliability indicators and a criterion for the efficiency of the operation of the 110 kV OHTL that reflect the systemic effect of the implementation of measures for improving the reliability of such line. These indicators, in contrast to the existing ones, take into account the cumulative impact of natural and operational factors.