토양의 저항률 및 비유전율의 주파수의존성을 고려한 접지임피던스의 이론적 산출

초록

This paper describes the measured results of the frequency-dependent resistivity and relative dielectric constant of the soil around the vertical ground rod of 2 m long. The grounding impedance of the vertical ground rod is simulated in both cases of constant and frequency-dependent soil parameters. The simulated results are compared with the measured grounding impedance and impedance phase. As a result, the simulated result with frequency-dependent soil parameters is in good agreement of the measured results, on the other hand, the simulated results with constant soil parameter are about 50 % higher than the measured grounding impedance in a few hundreds kHz.