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http://dx.doi.org/10.5370/KIEE.2014.63.3.331

Analysis of Effect on Lightning Surge according to the Grounding Condition of Overhead Ground Wire in Distribution System  

Han, Joon (College of Information and Communication Engineering, Sungkyunkwan University)
Kim, Chul-Hwan (College of Information and Communication Engineering, Sungkyunkwan University)
Seo, Hun-Chul (School of IT Engineering, Yonam Institute Digital Technology)
Choi, Sun-Kyu (Korea Electric Power Research Institute)
Lee, Byung-Sung (Korea Electric Power Research Institute)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.63, no.3, 2014 , pp. 331-337 More about this Journal
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.
Keywords
EMTP; Flashover rate; Grounding condition; Lightning surge; Overhead ground wire; Overvoltage;
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