NDLI: Effect of external ground on lightning performance of 69 kV and 24 kV circuits in MEA's distribution system

Content Provider	IEEE Xplore Digital Library
Author	Phayomhom, A. Thasananutariya, T. Sirisumrannukul, S.
Copyright Year	2009
Description	Author affiliation: Business Investment Department, Metropolitan Electricity Authority (MEA), 30 Chidlom Rd., Lumpini, Pathumwan, Bangkok, 10330, Thailand (Thasananutariya, T.) \|\| Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok 1518, Pibulsongkram Rd., Bangsue, Bangkok, 10800, Thailand (Sirisumrannukul, S.) \|\| Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Thailand (Phayomhom, A.)
Abstract	Back flashover generated from a lightning stroke hit on an overhead ground wire or a pole is one of the major causes of sustained interruption in Metropolitan Electricity Authority (MEA)'s distribution system. One effective way to reduce the effects of lightning overvoltage from back flashover is an attachment of external ground wire connected between the overhead ground wires and a ground rod. This paper analyzes the effects of lightning performance of 69 kV and 24 kV circuits installed on the same pole by ATP-EMTP. The lightning performance is evaluated in terms of top pole voltage, critical current and back flashover rate. The study results show that external ground wires can contribute toward improving these three performance indices and therefore offers a promising solution to improve reliability of the double-circuit subtransmission and distribution lines in MEA.
Starting Page	1
Ending Page	7
File Size	407895
Page Count	7
File Format	PDF
ISBN	9781424449347
DOI	10.1109/SUPERGEN.2009.5348386
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-06
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Insulation Lightning performance Distribution line Grounding Circuits Back flashover rate Conductors Wire Voltage control Porcelain Overhead ground wire Lightning Flashover Concrete External ground Subtransmission line
Content Type	Text
Resource Type	Article

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