Modelling of 132kV overhead transmission lines by using ATP/EMTP for back-flashover pattern recognition / Nur Zawani Saharuddin
Lightning overvoltage is the major cause of transmission-line outage in Malaysia. The phenomenon is a dominant factor considered in designing substations and transmission-line insulation, so its investigation is important. This study is thus essential to ensuring consistent performance of transmissi...
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| Format: | Thesis |
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2011
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| Online Access: | http://studentsrepo.um.edu.my/3590/1/Front_Cover.pdf http://studentsrepo.um.edu.my/3590/3/abstract.pdf http://studentsrepo.um.edu.my/3590/2/acknowledgement.pdf http://studentsrepo.um.edu.my/3590/4/table_of_content.pdf http://studentsrepo.um.edu.my/3590/5/chapter1%2D_chapter6.pdf http://studentsrepo.um.edu.my/3590/6/REFERENCES.pdf http://studentsrepo.um.edu.my/3590/7/APPENDIX_A%2D_D.zip http://pendeta.um.edu.my/client/default/search/results?qu=Modelling+of+132kV+overhead+transmission+lines+by+using+ATP%2FEMTP&te= http://studentsrepo.um.edu.my/3590/ |
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| Summary: | Lightning overvoltage is the major cause of transmission-line outage in Malaysia. The phenomenon is a dominant factor considered in designing substations and transmission-line insulation, so its investigation is important. This study is thus essential to ensuring consistent performance of transmission lines and electric power system. The work models a 132kV overhead transmission line by using ATP-EMTP software, for back-flashover pattern recognition. It examines back-flashover studies, as they are essential to evaluation of lightning performance (in reality, most of the lightning strikes terminate at shield-wire rather than the phase-conductor). The full transmission-line model here is divided into several parts: wires (shield wires and phase conductors), towers, cross-arms, insulator strings, tower-surge impedance and towerfooting resistance. The developed model is then simulated with four magnitudes of lightning-strike current, to investigate the back-flashover voltage pattern across the line insulation of the transmission tower. The dissertation discusses effects of tower-footing resistance towards the back-flashover voltage observed. It presents the work’s findings, and recommends possible future works. |
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