Abstract
The transmission line models implemented in general purpose programs used for the analysis of electromagnetic transients in power systems are not adequate for directly taking into account (a) distributed nonuniform parameters (b) distributed non-linear parameters or (c) distributed sources. However, these features are important in the analysis of many electromagnetic transient problems in power systems. A multiphase transmission line model adequate for taking into account the above-mentioned parameters has been developed. In this paper, application examples of this multi-purpose line model are presented illustrating the solution of various electromagnetic transient problems in power systems. The line model has been implemented as a separate set of Fortran routines that were then connected to EMTP using the standard interface provided by MODELS. This interface allows an external routine to be linked, and to be used in a data case as any regular model. Using a type-94 Thevenin circuit element, this Fortran model is connected directly to the nodes of the data-case, and is included in the simulation without any time-step delay.
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