ABSTRACT
The determination of the serial impedance and shunt admittance of an overhead transmission line (TL), with or without ground wire cables, is vitally important for the analysis of a TL. This chapter deals with determining the calculation of TL parameters. In voltage TLs above 230 kV, with a single conductor per phase, corona loss and communications interference can be very high. Thus, when we increase the grouping of conductors within the group, the high voltage gradient is reduced if two or more conductors are placed per phase at a distance that, compared to the distance between phases, is small. Carson's method can be applied to: inherently unbalanced circuits; distances between unequal conductors; lines without transposition; and lines with arbitrary number of conductors.
