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Air breakdown characteristics in rod-plane and sphere-plane electrode configuration under lightning impulse

Nor Azmuddin, Hafizah (2014) Air breakdown characteristics in rod-plane and sphere-plane electrode configuration under lightning impulse. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

This project is describes the air breakdown characteristic in rod-plane and sphere-plane electrode configuration under lightning impulse. The main problem in high voltage power (HV) equipment is the degradation of insulation quality of high voltage power equipment. As the high voltage power equipments are mainly subjected with spark over voltage causes by the lightning strokes and switching action. A protective device is used for determine the safe clearance required for proper insulation level. In this project, the lightning impulse voltages setup is used the manual guide from TERCO to generate the air breakdown voltage in high voltage laboratory. Two different electrodes (rod-plane and sphere- plane configuration) will be tested to compare the U50 and electric field (Emax) between the two electrodes with different gap. Up and down method was used to determine the U50 voltage. While to get the modeling of electrodes and simulation for electric field (Emax) between the two electrodes is using finite element method magnetic (FEMM) software. In the FEMM software, the gap between the electrodes a tested is 0.5cm, 1.0cm, 1.5cm, 2.0cm and 2.5cm using the average of the U50 voltage. In the thesis will describes the relationship between the U50 (kV), gap (cm), electric field (Emax) and field utilization factor (η). From this project can be seen that the voltage increased as the gap between the electrode increases. Meanwhile, when the Emax (kV/cm) value is high, the electrode will be easier to breakdown.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2000-2891 Dynamoelectric machinery and auxiliaries
Depositing User: Normajihan Abd. Rahman
Date Deposited: 30 Mar 2015 06:40
Last Modified: 30 Mar 2015 06:40
URI: http://eprints.uthm.edu.my/id/eprint/6636
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