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Analysis Of Lightning-Caused Ferroresonance In Capacitor Voltage Transformer (CVT) Using Harmonic Method

Ahmad Zakuan, Ahmad Dahalan (2012) Analysis Of Lightning-Caused Ferroresonance In Capacitor Voltage Transformer (CVT) Using Harmonic Method. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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The incident of explosion and failure of CVT due to lightning stroke is reported recently. The sudden high current of lightning cause output current and voltage in CVT change to high amplitude and high frequency. The ferroresonance in CVT occurred due to the existence of charging components such as inductor and capacitor. The phenomenon of rapidly change of current and voltage output may lead to over thermal and vital damage on CVT. Conventional mathematical calculation is complicated because of the high frequency and high current saturation is occurred. Therefore, the aims of this study are to analyze ferroresonance in capacitor voltage transformer (CVT) by analyzing the spectrum of harmonic and investigate the best method of ferroresonance reduction by applying ferroresonance suppression circuit (FSC) in CVT. Variety lightning current strength (34.5 kA, 100 kA and 200 kA) is applied base on the potential lightning strength in Malaysia. Passive FSC, parallel active FSC, series active FSC and electronic switching active FSC is used for ferroresonace reduction analysis. The scope of study is based on 132 kV capacitor voltage transformer is struck by lightning. The PSCAD software is applied for CVT simulation. The CVT current output is measured at secondary CVT transformer in time domain measurement.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Electric resonators, Lightning -- Measurement, Overvoltage, Lightning
Subjects: T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Library > Projek Sarjana Muda > FKE
Depositing User: Rohana Hashim
Date Deposited: 09 May 2013 08:32
Last Modified: 28 May 2015 03:50

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