Predetermination of Corona Losses Under Rain: Influence of Rain Intensity and Utilization of a Universal Chart

This paper deals with the corona losses of EHV lines in wet conditions. Using a calculation method presented in [1] and [2] and numerous measurements made in a test station, it is shown that surface state coefficients can be defined versus the aging of conductors and the intensity of rainfalls. Knowledge of the surface state coefficients allows the calculation of corona losses in rain of any EHV line.