The weather impact on corona losses of 330 kV aging transmission lines

The main objective of this work is to investigate the characteristics of different weather parameters on corona losses for aging overhead transmission lines using synchronized phasor measurements. The study is conducted for a long-term assessment using two years of data based on PMU measurements collected from Estonian TSO and weather data from the Estonian Environmental Agency. This research gives insight into information about weather factors influencing corona loss for two different aged transmission lines using a statistical graphical study. It is generally believed that aged transmission lines are more sensitive as they are exposed to different environmental conditions, leading to the deterioration of the line performances. Therefore, it would seem appropriate to investigate the factors influencing corona loss in an overhead transmission line. These results can be the basis for transmission system operators to reduce the power loss purchase and improve corona loss management under complex weather conditions to increase power grid efficiency.