The effect of soil ionization on transient grounding electrode resistance in non-homogeneous soil conditions
The soil ionization phenomenon effectively reduces the grounding electrode resistance. The existing methods to determine the soil ionization effect on the transient resistance of a grounding electrode are valid only for homogeneous soils. However, most soil structures are non-homogeneous. Realizing...
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| Main Authors: | , , |
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| Format: | Article |
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John Wiley and Sons Ltd
2016
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| Online Access: | http://eprints.utm.my/id/eprint/72332/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944080787&doi=10.1002%2fetep.2157&partnerID=40&md5=5486d791008574ecccaac0ece3f557ea |
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| Summary: | The soil ionization phenomenon effectively reduces the grounding electrode resistance. The existing methods to determine the soil ionization effect on the transient resistance of a grounding electrode are valid only for homogeneous soils. However, most soil structures are non-homogeneous. Realizing the importance of the issue, this study proposes a hybrid method to incorporate the soil ionization effect on the transient resistance of a grounding electrode located in non-homogeneous soil condition. The electromagnetic field approach is utilized to compute the ionized soil volume around the electrode to determine the equivalent radius of the electrode. A circuit-based method of computing the grounding resistance of the electrode in non-homogeneous soil conditions is proposed based on the per-unit-length distributed parameter method. The proposed method is validated by using an electromagnetic field-based numerical solution for the non-homogeneity effect of the soil on grounding electrode resistance. |
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