Analysis of lightning-caused ferroresonance in Capacitor Voltage Transformer (CVT)

Abdul Halim, Abu Bakar and Ahmad Nasarudin, Abd Rahim and Mohd Zambri, Mohd Khairi (2011) Analysis of lightning-caused ferroresonance in Capacitor Voltage Transformer (CVT). International Journal of Electrical Power & Energy Systems, Volume (Issue ). pp. 1536-1541. ISSN 0142-0615

[img] PDF (Received 20 April 2010, Revised 6 February 2011, Accepted 3 June 2011, Available online 5 August 2011)
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Power networks contain capacitances and inductances that can saturate, presenting opportunities for ferroresonance to occur. Most power equipment is designed through linear theory but ferromagnetic materials are highly non-linear and when they resonate, the non-linearity produces currents and voltages that are larger than usual. Ferroresonance is a complex, non-linear electrical phenomenon. It can cause dielectric and thermal problems through overvoltage, an intrinsic phenomenon present in all networks. A network dynamic response to lightning and switching will be energy storage and release. The transfer of energy will propagate an overvoltage through the network and damage substation equipment when lightning strikes near the substation. Application of conventional mathematics is inappropriate to ferroresonance study in which actual events are simulated. Lightning strikes that occurred near a substation and that led to explosion of CVTs have been reported, so this study investigates the effect of a lightning strike on a tower with a 132 kV Capacitor Voltage Transformer (CVT). Alternative Transient Program (ATP) was used for the simulation which duplicated the lightning-strike effect that causes a CVT to explode.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Electrical Engineering > Department of Industrial Power
Date Deposited: 14 Feb 2014 08:30
Last Modified: 28 May 2015 04:16
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