摘要
直流偏磁导致变压器局部过热,振动和噪声加剧,严重时可能损坏变压器。结合能量守恒原理,推导得到铁芯磁致伸缩与直流偏磁电流间的关系模型。基于所建立的数学模型,分析了直流偏磁引发的硅钢片的形变。以单相三柱变压器旁柱上最外层的硅钢片为对象进行了仿真研究,仿真结果证实了所推导模型的正确性,且表明磁致伸缩引发的铁芯形变是变压器振动加剧的关键因素。
DC bias may cause the partial overheat of transformer,exacerbate its vibration and noise and even damage it. According to the energy conservation law,a model of relationship between magnetostriction and DC- bias current is deduced,based on which,the deformation of silicon steel sheet caused by DC bias is analyzed. Simulative study is carried out for the outmost silicon steel of a single- phase three- column transformer and the simulative results prove the correctness of the deduced model and show the iron- core deformation caused by magnetostriction is the key factor exacerbating the transformation vibration.
出处
《电力自动化设备》
EI
CSCD
北大核心
2015年第12期122-125,共4页
Electric Power Automation Equipment
基金
山东省自然科学基金资助项目(ZR2012EEM002)~~
关键词
变压器
变压器铁芯
直流偏磁
力学特性
磁致伸缩
模型
仿真
electric transformers
transformer iron core
DC bias
mechanical characteristics
magnetostriction
models
computer simulation
