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Distributed Parameters Line (Frequency-Dependent)

Distributed parameters line model with frequency-dependent parameters

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  • Distributed Parameters Line (Frequency-Dependent) block

Description

The Distributed Parameters Line (Frequency-Dependent) block implements a multiphase distributed parameter line model with high-fidelity frequency-dependent parameters. It performs accurate transient response simulations for a wide frequency range (typically from DC to 100 kHz or more).

The geometry of the line and the frequency-dependent model parameters are defined in a MAT-file that is associated with the block. The MAT-file must be edited with the Power Line Parameters app, which computes the RLC line parameters for a defined range of frequencies and applies a fitting algorithm that converts the line parameters into a rational model. Rational fitting for this model is performed by using the vector fitting (VF) procedure. For more information on the phase domain line model and the state-space analysis, see [1].

Ports

Conserving

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Specialized electrical conserving port associated with terminal 1 on the sending end of the line.

Specialized electrical conserving port associated with terminal 2 on the sending end of the line.

Specialized electrical conserving port associated with terminal 3 on the sending end of the line.

Specialized electrical conserving port associated with terminal 1 on the receiving end of the line.

Specialized electrical conserving port associated with terminal 2 on the receiving end of the line.

Specialized electrical conserving port associated with terminal 3 on the receiving end of the line.

Parameters

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Name of a MAT-file that defines the geometry of the line and frequency-dependent model parameters. If the MAT-file is not on the MATLAB path, specify the full path name of the file.

This read-only parameter is the value of the DATA.LineLength variable saved in the specified MAT-file. This parameter is the length of the line, in km.

This read-only parameter is the value of the DATA.Phases variable saved in the specified MAT-file. This parameter is the number of phases defined for the line.

This read-only parameter is the value of the DATA.FrequencyRange variable saved in the specified MAT-file. This parameter is a detailed description of the frequency range of the internal model.

This read-only parameter displays the contents of the GUI.Comments variable saved in the specified MAT-file. This text provides complementary information about the line geometry and the type of conductors.

Select None to make no measurements.

Select Phase-to-ground voltages to measure the sending end and receiving end voltages for each phase of the line model.

Place a Multimeter block in your model to display the selected measurements during simulation.

In the Available Measurements list box of the Multimeter block, the measurement is identified by a label followed by the block name:

Measurement

Label

Phase-to-ground voltages, sending end

Us ph1 gnd

Phase-to-ground voltages, receiving end

Ur ph1 gnd

References

[1] Ramos-Leanos, O., and R. Iracheta. "Wide-Band Line Model Implementation in Matlab for EMT Analysis." Paper presented at the IEEE North American Power Symposium (NAPS), Arlington, TX, 26-28 Sept. 2010. https://ieeexplore.ieee.org/document/5618959

[2] Ramos-Leanos, O. "Wideband Line/Cable Models for Real-Time and Off-Line Simulations of Electromagnetic Transients." Paper presented at Diss. École Polytechnique de Montréal, April 2013. https://publications.polymtl.ca/1134/1/2013_OctavioRamosLeanos.pdf

[3] Ramos-Leanos, Octavio, José Luis Naredo, Jean Mahseredjian, Christian Dufour, José Alberto Gutierrez-Robles, and Ilhan Kocar. “A Wideband Line/Cable Model for Real-Time Simulations of Power System Transients.” IEEE Transactions on Power Delivery 27, no. 4 (October 2012): 2211–18. https://ieeexplore.ieee.org/document/6263255

[4] Iracheta, R., and O. Ramos-Leanos. "Improving computational efficiency of FD line model for real-time simulation of EMTS." Paper presented at the IEEE North American Power Symposium (NAPS), Arlington, TX, 26-28 Sept. 2010. https://ieeexplore.ieee.org/document/5618953

Introduced in R2020b