Experimental study of current-dependent grounding resistance of rod electrode

This paper has experimentally investigated transient behavior of grounding electrode systems especially for a high impulse current up to 40 kA in particular reference with a mutual grounding resistance between the electrodes. The experimental results show that the mutual grounding resistance depends...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2005-04, Vol.20 (2), p.1569-1576
Main Authors: Sekioka, S., Sonoda, T., Ametani, A.
Format: Article
Language:English
Subjects:
Applied sciences
Conductivity
Connection and protection apparatus
Current dependence
Current measurement
Disturbances. Regulation. Protection
Electric resistance
Electrical engineering. Electrical power engineering
Electrical grounding
Electrical power engineering
Electrical resistance measurement
Electrical resistivity
Electrodes
Exact sciences and technology
Grounding
grounding resistance
High current
High impulse
Ionization
Lightning
lightning surge
Low currents
Mathematical analysis
Nonlinearity
Power networks and lines
soil ionization
Soil measurements
Surges
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Summary:This paper has experimentally investigated transient behavior of grounding electrode systems especially for a high impulse current up to 40 kA in particular reference with a mutual grounding resistance between the electrodes. The experimental results show that the mutual grounding resistance depends on the applied current similarly to the current dependence of the self-grounding resistance. The phenomenon can be explained by the increase of an effective rod radius and an effective length. The self-grounding resistance greatly depends on the rod dimension and on the soil resistivity for low currents as analytically well known. However, the parameters cause a less effect on the nonlinear characteristic for high currents exceeding 10 kA.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2004.838660