Browse > Article
http://dx.doi.org/10.5370/KIEE.2017.66.2.363

Characteristics of Impulse Discharges in Wet Soil  

Kim, Hoe-Gu (Dept. of Electrical Engineering, Inha University)
Lee, Bok-Hee (Dept. of Electrical Engineering, Inha University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.66, no.2, 2017 , pp. 363-369 More about this Journal
Abstract
This paper presents the experimental results related to soil ionization and electrical breakdown in a concentric hemispherical electrode system under lightning impulse voltages. Dynamic voltage-current and impedance-time characteristics of soil ionization were measured and analyzed. Also the electrical breakdowns of the soil gap were investigated. The time-lag to the peak current corresponds to the soil ionization propagation. The time of ionization propagation in wet sand is found to decrease with increasing the impulse currents. A drastic decrease in ground resistance was observed during the impulse current spreading in sand. The electrical breakdown appears at the wave tail of impulse voltage and results in a wide scatter in V-t curves. The voltage-current curves have a fan-like shape attributed to ionization processes which result in increasing current and decreasing voltage.
Keywords
Impulse voltages; Ground resistance; Soil ionization; Z-t curves; V-I curve; Breakdown voltage;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 X. Wen, Z. Feng, H. Lu, X. Tong, L. Lan, W. Chen, and B. Tan, "Sparkover observation and analysis of the soil under the impulse current:, IET Sci. Measu. Technol., Vol. 10, Iss. 3, pp. 228-233, 2016.   DOI
2 J. He and B. Zhang, "Progress in Lightning Impulse Characteristics of Grounding Electrodes With Soil Ionization", IEEE Trans. on Industry Application, Vol. 51, No. 6, pp. 4924-4933, 2015.   DOI
3 L. M. Vasilyak, et al, "Electrical breakdown of soil under nonlinear pulsed current spreading", J. Phys. D. Appl. Phys. 48(2015), 285201 (pp. 7)   DOI
4 I. F. Gonos and I. A. Stathothopulos, "Soil ionization under lightning impulse voltages", IEE Proc. Sci.- Meas. Tech., Vol. 151, No. 5, pp. 343-346, 2004.   DOI
5 S. SekiokA. M. I. Lorentzou, M. P. Philppakou, and J. M..P. rousalidis. "Current-Dependent Grounding Resistance Model Based on Energy Balance of Soil Ionization", IEEE Trans. Power Delivery, Vol. 21, No. 1, pp. 194-201, 2006.
6 L. M. Vasilyak, et al., "Electrical breakdown of soil under nonlinear pulsed current spreading", J. Phys. D. Appl. Phys. 48(2015), 285201 (pp. 7)   DOI
7 P. Chowdhuri, "Impulse impedance tests on laboratory model ground electrodes" IEE Proc. Gener. Transm. Distrib., Vol. 150, No. 4, pp. 427-433, 2003.   DOI
8 J. H. Choi and B. H. Lee, "An anlysis of conventional grounding impedance based on the impulsive current distribution of a horizontal electrode", Electric Power Systems Research, Vol. 85, pp. 30-37, 2012.   DOI
9 J. H. Choi and B. H. Lee, "An anlysis of conventional grounding impedance based on the impulsive current distribution of a horizontal electrode", Electric Power Systems Research, Vol. 85, pp. 30-37, 2012.   DOI
10 B. H. Lee, H. G. Kim, G. H. Park and Y. H Baek, "Ionization Behaviors in various Soils Subjected to Impulse Currents", J. KIIEE, Vol. 22, No. 12, pp. 87-94, 2008.
11 B. H. Lee, G. H. Park, H. G. Kim and K. S. Lee, "Analysis of Soil Ionization Behaviors under Impulse Currents", Journal of Electrical Engineering & Technology, Vol. 4, No. 1, pp. 98-105, 2009.   DOI
12 A. M. Mousa, "The Soil Ionization Gradient Associated with Discharge of High Currents Into Concentrated Electrodes", IEEE Trans. Power Deli., Vol. 9, No. 3, pp. 1669-1677, 1994.   DOI
13 KS C IEC 60060-1 Std, Part 1-Guide on High-Voltage Testing Techniques, pp. 22-27, 2002.
14 P. Espel, R. R. D. A Bonamy, and J. N. Silva, A. Wetz, "Electrical Parameters Associated with Discharges in Resistive Soils", IEEE Trans, Power Deli., Vol. 19, No. 3, pp. 1174-1182, 2004.   DOI
15 V. A. Panov, L. M. Vasilyak, S. P. Vettchinin, V. Y. Pecherkin, and E. E. Son, "Pulsed electrical discharge in conductive solution", J. Phys. D. Appl. Phys. 49(2016), 385202 (pp. 9)   DOI
16 Bok-Hee Lee, Seung-Chil Lee, "The Major Foundational Technics for Grounding Systems", Euijae Pub. Co. 2nd Ed., pp. 37-104, 1999.
17 N. Mohamad Nor, A. Haddad, and H Griffiths, "Characterization of Ionization Phenomena in Soils Under Fast Impulses," IEEE Trans. Power Delivery, Vol. 21, pp. 353-361, 2006.   DOI