Description
This device is used for generating data for the Wideband Line/Cable model “WB m-phase” device. This device accepts Model data file from the Line Data and Cable Data (old) modules. After running and generating model data, the user can reopen the “WB fitter” and visualize the fitting results for the characteristic admittance Yc and the propagation function H. The data generated by this device is referenced in the Wideband Line/Cable model. The convergence tolerance is a relative tolerance; it can be modified when fitting problems are encountered. The default value is acceptable in most cases.
The fitting technique used by this device is described in [1].
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Mask and Parameters
Data Parameters
For portability reasons it is strongly recommended to locate the data file(s) in the same directory or in a directory below this design file. The project directory is the recommended choice.
| Name | Description | Unit | Variable = {Possible Values} | |||
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| Convergence tolerance | Tolerance used in the fitting process | - | ||||
| Select data file | The location of the EMTP file (lyz or cyz) given by the “WB fitter” device containing the line parameters | - | ||||
| Run this case to generate model data | Check box to run the case to generate model data | - | ||||
| View Yc fitting results from previous run | Link option to plot the fitting results of the entries of the characteristic admittance matrix | - | ||||
| View H fitting results from previous run | Link option to plot the fitting results of the entries of the propagation fucntion matrix | - | ||||
Help Parameters
| Name | Description | Unit | Variable = {Possible Values} | |||
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| Model documentation | Link option to to see the description of the device | - | ||||
Ports, Inputs, Outputs and Signals Available for Monitoring
Ports
None
Inputs
None
Outputs
None
Sensors
None
Data of a 3-phase transmission line
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: New module auxiliary module. The lyz generated by the Line Data module is used in the Wideband Line/Cable Fitter to produce a dat file for the WB line model. The fitting results are shown in a text file.
A portion of the dat file generated with the Wideband Line/Cable Fitter is shown next.
- 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