Characterization of Ionization Phenomena in Soils Under Fast Impulses
Protective devices such as spark gaps and surge arresters are used to divert surges to earth. It is, therefore, necessary that earthing systems are designed with a low-magnitude earth impedance value so that the overvoltage protection devices can divert high fault currents effectively to earth for a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
2006
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| Subjects: | |
| Online Access: | http://shdl.mmu.edu.my/2031/ http://shdl.mmu.edu.my/2031/1/1377.pdf |
| _version_ | 1848789944762368000 |
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| author | Nor, N.M. Haddad, A. Griffiths, H. |
| author_facet | Nor, N.M. Haddad, A. Griffiths, H. |
| author_sort | Nor, N.M. |
| building | MMU Institutional Repository |
| collection | Online Access |
| description | Protective devices such as spark gaps and surge arresters are used to divert surges to earth. It is, therefore, necessary that earthing systems are designed with a low-magnitude earth impedance value so that the overvoltage protection devices can divert high fault currents effectively to earth for all types of fault. Power frequency characterization of earthing systems is extensively researched and fairly well understood. However, the behavior of such systems under transient conditions is still not fully clarified.
This paper addresses some of these shortfalls. Laboratory experiments were set up to study the characteristics of the ionization phenomenon in various soil conditions. The soil ionization characteristics were investigated using a proposed new concept of pre- and post-ionization resistances. A measurement technique was developed to establish more accurate estimates of ionization electric field threshold, and an equivalent circuit representation is proposed. |
| first_indexed | 2025-11-14T18:04:46Z |
| format | Article |
| id | mmu-2031 |
| institution | Multimedia University |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T18:04:46Z |
| publishDate | 2006 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | mmu-20312011-08-10T06:53:36Z http://shdl.mmu.edu.my/2031/ Characterization of Ionization Phenomena in Soils Under Fast Impulses Nor, N.M. Haddad, A. Griffiths, H. TA Engineering (General). Civil engineering (General) Protective devices such as spark gaps and surge arresters are used to divert surges to earth. It is, therefore, necessary that earthing systems are designed with a low-magnitude earth impedance value so that the overvoltage protection devices can divert high fault currents effectively to earth for all types of fault. Power frequency characterization of earthing systems is extensively researched and fairly well understood. However, the behavior of such systems under transient conditions is still not fully clarified. This paper addresses some of these shortfalls. Laboratory experiments were set up to study the characteristics of the ionization phenomenon in various soil conditions. The soil ionization characteristics were investigated using a proposed new concept of pre- and post-ionization resistances. A measurement technique was developed to establish more accurate estimates of ionization electric field threshold, and an equivalent circuit representation is proposed. 2006-01 Article NonPeerReviewed application/pdf en http://shdl.mmu.edu.my/2031/1/1377.pdf Nor, N.M. and Haddad, A. and Griffiths, H. (2006) Characterization of Ionization Phenomena in Soils Under Fast Impulses. IEEE Transactions on Power Delivery, 21 (1). pp. 353-361. ISSN 0885-8977 http://dx.doi.org/10.1109/TPWRD.2005.852352 doi:10.1109/TPWRD.2005.852352 doi:10.1109/TPWRD.2005.852352 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Nor, N.M. Haddad, A. Griffiths, H. Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title | Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title_full | Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title_fullStr | Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title_full_unstemmed | Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title_short | Characterization of Ionization Phenomena in Soils Under Fast Impulses |
| title_sort | characterization of ionization phenomena in soils under fast impulses |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://shdl.mmu.edu.my/2031/ http://shdl.mmu.edu.my/2031/ http://shdl.mmu.edu.my/2031/ http://shdl.mmu.edu.my/2031/1/1377.pdf |