An Approach on Modelling of Distributed Overhead Lines for Transient Studies

With the increase in the need to maintain uninterrupted power supply, due to sensitive devices in modern industry, more and more attention is paid to the protection of distribution lines in atypical construction conditions. Taking into account that lightning strikes are a frequent and main cause of power interruptions, it is necessary to take into account all the factors that can affect the improvement of the performance of distribution lines. This paper introduces a novel approach by incorporating tower grounding resistance, height, type, surge arrester, and flashover models in conditions of high soil resistance without physical protection. The proposed modelling procedure is validated through simulations on the 35 kV line "Kotor - Lovćen" in Montenegro, characterized by inadequate protection and high soil resistance, using the EMTP software and adhering to IEEE 1410 - 2004 standards.