NDLI: Equivalent resistivity approximation of two-layer earth structures for earth return impedance calculations

Content Provider	IEEE Xplore Digital Library
Author	Tsiamitros, D.A. Papagiannis, G.K. Dokopoulos, P.S.
Copyright Year	2005
Description	Author affiliation: Aristotle Univ. of Thessaloniki, Thessaloniki (Tsiamitros, D.A.; Papagiannis, G.K.; Dokopoulos, P.S.)
Abstract	The equivalence conditions between homogeneous and two-layer earth structures are investigated in this paper. The analysis is based on the comparison between the two-layer and the homogeneous earth return impedance relations. The aim is the derivation of a new simple formula to connect the homogeneous earth equivalent resistivity with the two-layer earth electromagnetic and geometric properties. Thus, the relatively simple expressions for the impedance calculation of the homogeneous earth case can be used for two-layer earth models. The new formula is implemented for six actual cases of two-layer earth models. The two-layer earth impedances are calculated for various configurations, including overhead transmission lines, underground cable systems and a combination of overhead line and underground conductor. The calculated impedances are compared to the corresponding for the homogeneous earth, using the equivalent resistivity given by the new formula.
Starting Page	1
Ending Page	7
File Size	2316920
Page Count	7
File Format	PDF
ISBN	9785932080344
DOI	10.1109/PTC.2005.4524626
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-27
Publisher Place	Russia
Access Restriction	Subscribed
Rights Holder	Energy Systems Institute
Subject Keyword	Earth Impedance Conductors Cables Permeability Power transmission lines Power system modeling Permittivity Conductivity measurement Soil Power Transmission Line Impedance Electromagnetic Transients Analysis Nonhomogeneous Earth Power Cable Modelling
Content Type	Text
Resource Type	Article

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