Nonuniform Characteristics of a Horizontal Grounding Electrode

This paper has investigated the nonuniform characteristics of a counterpoise based on the frequency-dependence of R, L, C, and G and propagation parameters identified from measured results of transient voltages and currents on the counterpoise. It becomes clear that the characteristic impedance is s...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2007-10, Vol.22 (4), p.2327-2334
Main Authors: Mishra, A.K., Ametani, A., Nagaoka, N., Okabe, S.
Format: Article
Language:English
Subjects:
Admittance
Applied sciences
Connection and protection apparatus
Current measurement
distributed-line
Electric potential
Electrical engineering. Electrical power engineering
Electrodes
Exact sciences and technology
Frequency measurement
Geometry
Grounding
grounding electrode
H infinity control
High frequencies
Impedance
Nonuniform
nonuniform line
Nonuniformity
numerical identification
Physical properties
Soil measurements
Voltage
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Summary:This paper has investigated the nonuniform characteristics of a counterpoise based on the frequency-dependence of R, L, C, and G and propagation parameters identified from measured results of transient voltages and currents on the counterpoise. It becomes clear that the characteristic impedance is significantly length-dependent (i.e non-uniform, at a high frequency). As the frequency tends to infinity, the maximum value of the characteristic impedance is almost the same irrespective of its geometry, physical constants and soil conditions. However, the characteristic impedance at a section near to source end is far smaller than that near to the remote end. The apparent series impedance increases and the admittance decreases for a counterpoise section farther to the source end. The propagation constant shows less noticeable nonuniformity than that for the characteristic impedance.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2007.905438