变压器单次短路冲击绕组变形分析

Analysis of Transformer Single Short-Circuit Impulse Winding Deformation

变压器是煤矿电力系统中的重要元件,在使用过程中会面临短路冲击,引起内部电磁力及温度变化,导致绕组变形,造成变压器的破坏及失效。针对此问题,采用有限元仿真的形式分析中压绕组短路冲击作用时的应力及变形。结果表明,绕组中间位置承受较大的冲击应力并产生较大的形变,且具有不可恢复性,影响变压器的安全使用,应对其进行一定的优化处理。

Transformers are important components in coal mine power systems.During use,they face short-circuit impact,causing internal electromagnetic forces and temperature changes,resulting in winding deformation,transformer damage,and failure.To address this issue,finite element simulation is used to analyze the stress and deformation of the medium voltage winding under short-circuit impact.The results indicate that the middle position of the winding bears significant impact stress and produces significant deformation,which is irreversible and affects the safe use of the transformer.Therefore,certain optimization measures should be taken.