Grouped conductor surface voltage gradients

GROUPED CONDUCTORS, two or more parallel conductors per phase, have properties which allow their use in a-c power transmission at higher voltages, including: lower surface voltage gradient, directly contributing to lower corona losses; lower inductive reactance; higher capacitive susceptance. To determine by analytical methods the degree grouped conductors affect the conductor surface voltage gradients is the aim of this article. The calculated values of voltage gradients can be used to guide tests on corona losses.