Nur Zawani, Saharuddin (2011) Modelling of 132kV overhead transmission lines by using ATP/EMTP for back-flashover pattern recognition / Nur Zawani Saharuddin. Masters thesis, University of Malaya.
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Abstract
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.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | Dissertation submitted in fulfillment of the requirement for the degree of Master Of Engineering |
| Uncontrolled Keywords: | Transients (Electricity)--Prevention; Power transmission; Overhead electric lines; Electric apparatus and appliances; Overvoltage; Lightning; Transmission Lines; back-flashover; Engineering. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Asma Nadia Zanol Rashid |
| Date Deposited: | 30 Apr 2013 13:48 |
| Last Modified: | 24 Dec 2013 20:05 |
| URI: | http://studentsrepo.um.edu.my/id/eprint/3590 |
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