This paper deals with the loadability characteristics of overhead transmission lines (OHLs). The target is to provide a general analytical formulation of the loadability characteristics of uncompensated OHLs. This is a completely new approach: no previously published work has adopted an analytical approach to characterize the different regions of the loadability curves. In order to allow a direct comparison with previous works, an application example concerns the 400 kV single circuit OHLs widely used in Western Europe.
