干式变压器铁芯振动特性的研究分析

Research and Analysis of Vibration Characteristics of Dry-Type Transformer Core

干式变压器是电力系统中常用的重要电气设备,对电力系统的稳定运行具有重要的影响作用。干式变压器中的主要组成部分包括铁芯及绕组,由于磁致伸缩效应及电磁力的作用,使得变压器在工作过程中存在一定的振动,不利于变压器的稳定使用。针对干式变压器铁芯的振动特性采用有限元仿真计算的形式进行分析,建立变压器多物理场耦合分析模型,在不同的电压下对变压器的磁场分布及振动位移进行分析。结果表明,变压器空载状态下随着电压的增加,其内部的磁场密度及振动位移随之增加,且呈现一定的周期性,容易引发变压器的故障。

Dry-type transformer is an important electrical equipment commonly used in the power system,which has an important influence on the stable operation of the power system.The main components of dry-type transformer include iron core and winding,due to the magnetostrictive effect and the role of electromagnetic force,making the transformer in the working process there is a certain amount of vibration,which is not conducive to the stable use of the transformer.The vibration characteristics of the dry-type transformer core are analysed in the form of finite element simulation calculations,and a multi-physical field coupling analysis model of the transformer is established to analyse the magnetic field distribution and vibration displacement of the transformer under different voltages.The results show that the magnetic field density and vibration displacement inside the transformer increase with the increase of voltage under no-load condition,and present a certain periodicity,which is easy to cause transformer failure.