Analysis of the Effect of Electric Charge Discharge (Corona) on Power Shrinkage on Transmission Lines

Abstract

This study discusses the analysis of the effect of electric discharge (corona) on power loss in the transmission line between the Glugur Substation and the Paya Geli Substation. Corona occurs when the voltage on the transmission line conductor exceeds the threshold of the air penetration field strength, causing electric discharge into the air and resulting in power losses. This study measures corona power losses throughout 2024 and calculates the efficiency of the transmission line based on power losses caused by the corona phenomenon. Air pressure, temperature, and air density factor data are used to calculate corona losses, with the results showing large variations in each month, ranging from 0.385 kW in January to 24.739 kW in December. The efficiency of the transmission line is calculated at 90.9%, indicating that even though there are power losses due to corona, most of the power transmitted is still received by the receiving substation. Environmental factors such as temperature and air pressure have a significant effect on the magnitude of corona losses, so managing weather conditions and conductor maintenance are important factors in maintaining power transmission efficiency. The results of this study provide important insights to improve the performance of transmission lines in dealing with the corona phenomenon.