实际接地系统的冲击特性试验研究(英文)  

Experimental Investigation of Impulse Characteristics of Practical Ground Electrode Systems

作　　者：N.Harid M.Ahmeda H.Griffiths A.Haddad 

机构地区：[1]High Voltage Energy System Group.School of Engineering,Cardiff University,Wales,UK

出　　处：《高电压技术》2011年第11期2721-2726,共6页High Voltage Engineering

摘　　要：In this work,the results of an experimental study of the impulse characteristic of practical ground electrodes consisting of horizontal conductors of various lengths and full-scale tower footings were reported.These electrodes were installed at an outdoor test site having nonuniform 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,the voltage and current distribution along the electrode length and the effect of the injection point along the electrode.The tests on the tower footings were used to determine impulse resistance and demonstrate its non-linear variation with current magnitude.Computer simulations of the test electrodes using the electromagnetic field method showed good agreement with the measured result.In this work, the results of an experimental study of the impulse characteristic of practical ground electrodes consisting of horizontal conductors of various lengths and full-scale tower footings were reported. These electrodes were 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, the voltage and current distribution along the electrode length and the effect of the injection point along the electrode. The tests on the tower footings were used to determine impulse resistance and demonstrate its non-linear variation with current magnitude. Computer simulations of the test electrodes using the electromagnetic field method showed good agreement with the measured result.

关 键 词：ground electrode impulse current ground impedance effective length horizontal electrode tower footing soil ionisation impulse resistance 

分 类 号：TM866[电气工程—高电压与绝缘技术]