Investigation on Transformer Oil Impedance during Breakdown under AC Voltage

被引：0
|
作者：
Abdi, S. [1 ]
Boubakeur, A. [2 ]
Harid, N. [3 ]
Haddad, A. [3 ]
机构：
[1] Univ Medea, Ain Dheb 26000, Medea, Algeria
[2] Ecole Natl Polytech, LRE, Algiers, Algeria
[3] Cardiff Univ, Sch Engn, Cardiff CF24 3AA, S Glam, Wales
来源：
CEIDP: 2009 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA | 2009年
关键词：
D O I：
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中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we present an experimental study on the properties of mineral oils under ac breakdown conditions. Breakdown tests were carried out on mineral oil samples using a sphere-sphere electrode test cell for various gap lengths 1mm, 2.5mm and 5mm and at different voltage speed ramps: 0.5kV/s, 2kV/s and 3.5kV/s. The dynamic impedance of the mineral oil samples was determined from the instantaneous ratio of voltage and current. Such dynamic impedance can be used to explore the properties of the arc and its development within the oil. The results of this investigation show that the gap length and the voltage speed ramp have a significant influence on both the impedance magnitude and the decay time taken to reach the minimum impedance.
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页码：85 / +
页数：2
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