| Title |
Analysis of Effect on Lightning Surge according to the Grounding Condition of Overhead Ground Wire in Distribution System |
| Authors |
한준(Han, Joon) ; 김철환(Kim, Chul-Hwan) ; 서훈철(Seo, Hun-Chul) ; 최선규(Choi, Sun-Kyu) ; 이병성(Lee, Byung-Sung) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.3.331 |
| Keywords |
EMTP ; Flashover rate ; Grounding condition ; Lightning surge ; Overhead ground wire ; Overvoltage |
| Abstract |
The Korean distribution system consists of overhead ground wire (OHGW), phase conductors and neutral wire. Especially, OHGW is installed over the phase conductors to protect distribution system from the lightning surge. The flashover rate and the magnitude of lightning overvoltage on distribution system can be affected by grounding condition of OHGW such as grounding resistance and grounding interval. In this paper, we conduct an analysis of lightning overvoltage and flashover rate according to the grounding condition of OHGW. The distribution system and lightning surge are modeled by using ElectroMagnetic Transient Program (EMTP). Also, the Monte Carlo method is applied to consider random characteristics of lightning, and the flashover rate is calculated based on IEEE std. 1410. The simulations are performed by changing the grounding resistance and interval of OHGW and the simulation results are analyzed. |