| Title |
Transient Grounding Impedance Behaviors of Deeply-driven Ground Rods According to the Injection Point of Impulse Currents |
| Authors |
Su-Bong Lee ; Feng-Li ; Seung-Ju Lee ; Byung-Wook Jeon ; Bok-Hee Lee |
| Keywords |
Deeply-driven ground rod ; Transient grounding impedance ; Conventional grounding impedance ; Impulse current |
| Abstract |
This paper presents the transient and conventional grounding impedance behaviors of deeply-driven ground rods associated with the injection point of impulse currents. The transient grounding impedance strongly depends on the length of deeply-driven ground rod and the rise time and injection point of impulse currents, and the intrinsic inductance of ground rod has a significant affect on the transient grounding impedance of grounding system in fast rise time ranges. The reduction of inductance is decisive to improve the impulse impedance behaviors of deeply-driven ground rods. It is effective that grounding conductor is connected to the top of the ground rod as short as possible. |