DocumentCode :
1112607
Title :
Propagation on Overhead Transmission Lines I-Theory of Modal Analysis
Author :
Hedman, D.E.
Author_Institution :
General Electric Company, Schenectady, N. Y.
Volume :
84
Issue :
3
fYear :
1965
fDate :
3/1/1965 12:00:00 AM
Firstpage :
200
Lastpage :
205
Abstract :
This paper will investigate the technique of modal analysis applied to propagation of signals on overhead transmission lines. The propagation problem is first analyzed in phase quantities at a constant frequency and then with modal transformations in the original differential equations. From the model analysis, properties of modal transformations are deduced. This analysis shows that when earth correction terms are used in the description of the transmission line, the propagation constant matrix can be used to determine the modal transformations; it is also demonstrated that to evaluate the phase quantity results numerically it is necessary to perform a modal (eigenvalue) transformation. The general equations, evaluated for perfect earth, show that the surge impedance matrix can be used to determine the modal transformations, as has been done by previous authors.
Keywords :
Differential equations; Earth; Eigenvalues and eigenfunctions; Frequency; Modal analysis; Performance analysis; Performance evaluation; Power transmission lines; Propagation constant; Transmission line matrix methods;
fLanguage :
English
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9510
Type :
jour
DOI :
10.1109/TPAS.1965.4766176
Filename :
4766176
Link To Document :
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