Application of nonuniform-line theory to the simulation of electromagnetic transients in power systems

The objective of this article is to illustrate the applicability of the nonuniform transmission line as a modeling tool in electromagnetic transient studies of power systems, First, the a-domain method, that was developed previously by the authors for lossless single-phase nonuniform transmission lines, was generalized to include lossy untransposed three-phase lines with frequency-dependent parameters. Second, the new generalized version of the s-domain method was used to obtain the transients on an actual transition segment between an overhead line and an underground cable. Third, the simulation results are compared with those obtained from the uniform-line model used by the well-known Electromagnetic Transients Program. (C) 1998 Elsevier Science Ltd.