| Title |
The Comparison on Grounding Characteristics for 3 Grounding Systems |
| Authors |
신동호(Shin, Dong-Ho) ; 김용(Kim, Yong) ; 백수현(Baek, Soo-Hyun) ; 이은영(Lee, Eun-Young) ; 김필수(Kim, Pill-Soo) ; 조대훈(Cho, Dae-Hoon) |
| Keywords |
rod grounding systems ; mesh grounding systems ; electrolytic grounding systems ; Transient GPR |
| Abstract |
This paper presents a comparison on the resistance and characteristics of transient response of grounding systems under surge currents using frequency domain electromagnetic field analysis software package and field test. Analysis is done by computer model, based on electromagnetic field theory approach, that accurately takes into account frequency dependent characteristics of the system. The transient performance of three grounding systems is analyzed by comparison of frequency dependent impedance and the maximal transient GPR. A double exponential lighting surge current is injected at one corner of the grounding systems. The transient GPRs a rod grounding systems are higher than mesh or electrolytic grounding systems. Af field test, the results of resistance measurement and time-variant of ground resistance slightly reduce electorlytic grounding systems less than rod and mesh grounding systems. |