NDLI: Phase-Domain Transmission-Line Modeling With Enforcement of Symmetry Via The Propagated Characteristic Admittance Matrix

Content Provider	IEEE Xplore Digital Library
Author	Semlyen, A. Gustavsen, B.
Copyright Year	1986
Abstract	Transmission-line models for electromagnetic transient simulation are usually based on the traveling-wave method. While recent developments have focused on phase-domain formulations with an emphasis on accuracy and passivity enforcement, no consideration has been given to ensure the symmetry of the model. In this paper, we introduce the symmetry preserving property (SPP) of the propagation matrix H as a way of enforcing a symmetrical model. This property is enforced by replacing the (unsymmetrical) propagation matrix H with the (symmetrical) propagated characteristic admittance matrix during the process of rational fitting. The propagation matrix H is recovered analytically for use in the final line model. We show a procedure for enforcement of SPP and the resulting model is implemented in an Electromagnetic Transients Program-like simulation environment. Although the computational efficiency decreases somewhat with the new approach, the symmetry of the model offers significant advantages. Besides being physically correct, it avoids confusion when performing sanity checking of complex network models.
Sponsorship	IEEE Power Engineering Society
Starting Page	626
Ending Page	631
Page Count	6
File Size	463398
File Format	PDF
ISSN	08858977
Volume Number	27
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmission line matrix methods Symmetric matrices Admittance Computational modeling Transmission lines Mathematical model Delay effects transmission-line model Electromagnetic transients Electromagnetic Transients Program (EMTP) symmetry
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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Passivity Enforcement for Transmission Line Models Based on the Method of Characteristics

Admittance-Based Modeling of Transmission Lines by a Folded Line Equivalent

Causality Preserving Passivity Enforcement for Traveling-Wave-Type Transmission-Line Models

Weighting Method for Transient Analysis of Underground Cables

Direct phase-domain modelling of frequency-dependent overhead transmission lines

Reduced order transmission line modeling for improved efficiency in the calculation of electromagnetic transients

Phase-domain transmission line models considering frequency-dependent transformation matrices

Combined phase and modal domain calculation of transmission line transients based on vector fitting

Improvement of Numerical Stability for the Computation of Transients in Lines and Cables

Phase-Domain Transmission-Line Modeling With Enforcement of Symmetry Via The Propagated Characteristic Admittance Matrix

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