Description

This device is used for modeling transmission lines or cables. It is the most sophisticated line and cable modeling technique available. It represents the complete frequency dependence of parameters and constitutes a wideband model. There is only a multiphase version of this device.

The user must enter the Number of conductors and select the model data file. The model data file format must be the one given in the “Wideband Line/Cable Fitter” device. The drawing of this device is continuously updated according to the selected number of conductors. More theoretical and model implementation details can be found in [1].

Table of Contents

Mask and Parameters

Parameters

Name	Description	Unit	Variable = {Possible Values}
Description	Use this field to add information about the component		Description = {'string'}
EMTP .dat file	The location (path) of the EMTP file (dat) given by the “WB fitter” device containing the line parameters		File = {'path.name'}
Number of conductors	Number of conductors in the line/cable system		Nb_conducteurs = {0, 1e64}
Minimum propagation delay	Minimum value of the different propagation mode delays in the line/cable system	s	MinPropagationDelay = { [ 0, 1e64 ] }
Number of Yc poles	Number of poles in the fitting of the characteristic admittance matrix		nbYcPoles = { [0, 9999] }
Number of H poles	Sum of the different propagation function pole numbers		nbHPoles = {'0, 9999'}
Number of modes	Number of propagation modes		nbModes = { [0, 9999] }
Number of phases	Number of phases		numPhases = { [0, 12] }

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

This component supports a multiphase transmission line with n phases

Name	Description
net_(1,2,...,n)_1	Network connection of phases (1,2,..,n) of the left (+) side
net_(1,2,...,n)_2	Network connection of phases (1,2,...,n) of the right side

Inputs

None

Outputs

None

Sensors

None

Data of a 3-phase WB Line Model

The following figure shows the geometrical data of a 735-kV transmission line as an example to simulate a 3-phase WB model.

The calculation of the electrical parameters can be done with the Line Data auxiliary module. The lyz file is used in the Wideband Line/Cable Fitter module to produce a dat file for the WB line model. A portion of the dat file generated with the Wideband Line/Cable Fitter is shown next.

Reference

Morched A., Gustavsen B. and Tartibi M.: “A universal model for accurate calculation of electromagnetic transients on overhead lines and underground cables”. Power Delivery, IEEE Transactions, Volume: 14, Issue: 3 , July 1999, pp. 1032 -1038