Selection of Viable Distribution Line Surge Arrester for Prospective Optimal Protection

Indirect lightning causes power outages along over-head distribution lines. The installation of surge arresters (SAs) at the line towers/poles effectively reduces lightning-induced overvoltages. Among the types of SAs used in practice, non-gapped line arresters (NGLAs) have been mainly used in the past for a long time, while externally gapped line arresters (EGLAs) are being used in recent practice to overcome the disadvantages of NGLAs. This analysis focuses on the performance of these SAs in terms of flashover mitigation on a real medium voltage distribution line. Critical lightning parameters, including lightning current magnitude, and tower footing resistance, are considered. The primary objective of the analysis is to identify the SA that offers superior lightning performance. This evaluation is crucial for optimizing the prospective location of the arresters. By comparing the lightning performance of different SAs, the study aims to determine the most effective option for mitigating lightning-induced surges.