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Energies 2017, 10(8), 1158; https://doi.org/10.3390/en10081158

A Full Frequency-Dependent Cable Model for the Calculation of Fast Transients

1
Department of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09126 Chemnitz, Germany
2
Department of Electrical Engineering and Informatics, University of Applied Sciences Zittau/Goerlitz, 02763 Zittau, Germany
*
Author to whom correspondence should be addressed.
Received: 12 June 2017 / Revised: 18 July 2017 / Accepted: 27 July 2017 / Published: 7 August 2017
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Abstract

The calculation of frequency-dependent cable parameters is essential for simulations of transient phenomena in electrical power systems. The simulation of transients is more complicated than the calculation of currents and voltages in the nominal frequency range. The model has to represent the frequency dependency and the wave propagation behavior of cable lines. The introduced model combines an improved subconductor method for the determination of the frequency-dependent parameters and a PI section wave propagation model. The subconductor method considers the skin and proximity effect in all conductors for frequency ranges up to few megahertz. The subconductor method method yields accurate results. The wave propagation part of the cable model is based on a cascaded PI section model. A modal transformation technique has been used for the calculation in the time domain. The frequency-dependent elements of the related modal transformation matrices have been fitted with rational functions. The frequency dependence of cable parameters has been reproduced using a vector fitting algorithm and has been implemented into an resistor-inductor-capacitor network (RLC network) for each PI section. The proposed full model has been validated with measured data. View Full-Text
Keywords: subconductor method; frequency-dependent cable parameters and impedances; PI sections; cable model; time domain subconductor method; frequency-dependent cable parameters and impedances; PI sections; cable model; time domain
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Hoshmeh, A.; Schmidt, U. A Full Frequency-Dependent Cable Model for the Calculation of Fast Transients. Energies 2017, 10, 1158.

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