YÜKSEK GERİLİM HATLARINDA TOPRAKLAMA ÇÖZÜMLERİ İLE YILDIRIM ELEKTROMANYETİK DARBELERİNİN İNCELENMESİ

This study evaluated the grounding improvement works in power transmission lines in a technical and scientific framework. The aim of the study is to detail the grounding improvement processes to increase the reliability and efficiency of power transmission lines. Lightning and Electromagnetic Pulse (LEMP) intensities and current amplitudes obtained from the General Directorate of Meteorology (MGM) were taken into account in the analyses. The electrical performance of the line and its resilience against LEMP induced faults are evaluated using simulations with Electromagnetic Transients Program (ATP-EMTP) software. As an example, the Isparta (Keciborlu)-Burdur power transmission line is analysed and the reductions in the number of LEMP-induced tripping are investigated as a result of grounding improvement works. Guy Wires (GW) increased the coupling between the phase conductors, enabling more effective transfer of the LEMP current to earth and reducing the equivalent earth resistance. In the study, it is recommended that the use of low-cost and easy-to-install methods such as GW should be widespread due to the high cost of line surge arresters. In addition, GW applications on 154 kV power transmission lines were analysed in detail and it was found that this technique provides a reduction of up to 66% in the jump voltage at the insulator end. The study emphasizes the importance of grounding improvement methods for the creation of a reliable, sustainable and economical infrastructure in power transmission lines. These findings are expected to contribute to the literature for the development of more effective and cost-effective solutions in power systems.