TY - GEN
T1 - Experimental investigation of the impulse characteristics of practical ground electrode systems
AU - Haddad, A.
AU - Griffiths, H.
AU - Ahmeda, M.
AU - Harid, N.
PY - 2010
Y1 - 2010
N2 - In this work, the results of an experimental study of the impulse characteristic of practical ground electrodes consisting of horizontal conductors of various lengths, a grounding grid and full-scale tower footings are reported. These electrodes are installed at an outdoor test site having non-uniform soil, with equipment facilities for generating low- and high-magnitude impulse currents. The tests on the horizontal electrode were used to determine the effective length and the voltage and current distribution over the electrode length. For the grounding grid, the impulse resistance was determined and compared with the low-frequency resistance. The tests on the tower footings were intended to determine impulse resistance and demonstrate its non-linear variations with current magnitude. Isolated tower footings showed large reductions in impulse resistance due to soil ionisation compared with the full tower base, which showed only a small reduction. Computer simulations of the test electrodes using the electromagnetic field method showed good agreement with the measured results.
AB - In this work, the results of an experimental study of the impulse characteristic of practical ground electrodes consisting of horizontal conductors of various lengths, a grounding grid and full-scale tower footings are reported. These electrodes are installed at an outdoor test site having non-uniform soil, with equipment facilities for generating low- and high-magnitude impulse currents. The tests on the horizontal electrode were used to determine the effective length and the voltage and current distribution over the electrode length. For the grounding grid, the impulse resistance was determined and compared with the low-frequency resistance. The tests on the tower footings were intended to determine impulse resistance and demonstrate its non-linear variations with current magnitude. Isolated tower footings showed large reductions in impulse resistance due to soil ionisation compared with the full tower base, which showed only a small reduction. Computer simulations of the test electrodes using the electromagnetic field method showed good agreement with the measured results.
UR - http://www.scopus.com/inward/record.url?scp=78650628293&partnerID=8YFLogxK
U2 - 10.1109/ICHVE.2010.5640724
DO - 10.1109/ICHVE.2010.5640724
M3 - Conference contribution
AN - SCOPUS:78650628293
SN - 9781424482863
T3 - 2010 International Conference on High Voltage Engineering and Application, ICHVE 2010
SP - 469
EP - 472
BT - 2010 International Conference on High Voltage Engineering and Application, ICHVE 2010
T2 - 2010 International Conference on High Voltage Engineering and Application, ICHVE 2010
Y2 - 11 October 2010 through 14 October 2010
ER -