期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：170
期号：4
页码：042096
DOI：10.1088/1755-1315/170/4/042096
语种：English
出版社：IOP Publishing
摘要：Transformer is an important equipment serving in power system. In this paper, the influence of metal particles on the electric field of transformer outlet device is studed via numerical simulation. The results reveal that the metal particles can increase the maximum field strength between the oil gap of the outlet device and the maximum field strength increases with the increase of the particle radius. The local field strength greater than the allowable oil gap may cause local micro-discharge. Metal particles in the alternating current field oscillation and discharge may be the bubble can make the electric field distortion, accelerate the process of insulation cracking and may further lead to insulation breakdown. By altering the oil gap width of outlet device, its insulation endurance can be improved under the influence of metallic particles.
