Title :
Studies of lightning overvoltages of 115 kV CMU GIS substation
Author :
Thanasaksiri, T.
Author_Institution :
Department of Electrical Engineering, ChiangMai University, Thailand 50200
Abstract :
This paper presents the analysis of lightning overvoltage for the new coming 115 kV CMU (ChiangMai University) GIS (Gas Insulated Switchgear) substation applying simplified models. The GIS being considered here is connected to an overhead line through XLPE underground cables. The sensitivity analysis of lightning overvoltage have been evaluated using ATP-EMTP. Factors including, pole footing resistance, cable length and additional surge arrester installed which gives the variation of overvoltages in GIS have also been considered. Finally, means to reduce the lightning overvoltages for the new coming 115 kV CMU GIS substation will be recommended.
Keywords :
Arresters; Gas insulation; Lightning; Power cables; Resistance; Substations; Surges;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2012 9th International Conference on
Conference_Location :
Phetchaburi, Thailand
Print_ISBN :
978-1-4673-2026-9
DOI :
10.1109/ECTICon.2012.6254221