| Title |
Grounding Characteristics Analysis of the Rod-Type Grounding Electrodes used for Electric Distribution Systems |
| Authors |
Kyung-Chul Kim ; Ji-Won Jung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2011.25.6.049 |
| Keywords |
Copper Rod ; Concrete Rod ; Grounding Resistance ; Grounding Impedance ; Frequency and Time Domain Characteristics Test |
| Abstract |
Grounding system insures a reference potential point for electric devices and also provides a low impedance path for fault currents or transient currents in the earth. The ground impedance as function of frequency is necessary for determining its performance since fault currents could contain a wide range of frequencies. In this paper, the grounding resistance, grounding impedance and transient grounding impedance are measured by using 3-point fall-of-potential method in order to analyse grounding characteristics of the copper and concrete rod grounding electrodes. An equivalent transfer function model of the ground impedance and transient grounding impedance are identified from the measured values by using ARMA method and evaluated by comparing the conventional grounding impedance. |