高电压技术2017，Vol.43Issue(3)：980-986,7.DOI:10.13336/j.1003-6520.hve.20170303040
超高压变压器铁芯硅钢片磁致伸缩力数值计算
Numerical Calculation of Magnetostrictive Force for EHV Transformer Core Silicon Steel
摘要
Abstract
The noise and vibration of EHV power transformer originate mainly from the magnetostriction of the core.In order to accurately calculate the transformer core magnetostrictive effect,we proposed the magnetostrictive numerical calculation of force-thermal stress comparison.Firstly,we used the ANSYS finite element analysis software to build 3D transient electromagnetic field numerical calculation model of power transformer,and solved the core flux density values at different times for each node.Secondly,according to the magnetostrictive force-thermal stress comparison,we loaded the tested magnetostrictive characteristic curves of silicon,calculated the magnetostrictive force on each node of the core at different times,and leaded the core magnetostrictive force into the structure field and sound field calculation model to get the sound vibration displacement and sound pressure distribution of the core body.Finally,we analyzed the effect of reducing the core body vibration noise effect by lowering the flux density,and compared the intensity and distribution of core body vibration noise at different flux densities,demonstrating the effectiveness of this method.Comparative results show that the core flux density reduces by 0.05 T and the maximum sound pressure is reduced by about 1.26 dB.关键词
超高压变压器/铁芯/磁致伸缩/热应力比拟/振动/噪声Key words
EHV transformer/core/magnetostriction/thermal stress comparison/vibration/noise引用本文复制引用
韩芳旭,李岩,井永腾,王欢..超高压变压器铁芯硅钢片磁致伸缩力数值计算[J].高电压技术,2017,43(3):980-986,7.基金项目
国家自然科学基金(51177103) （51177103）
辽宁省高校创新团队支持计划(LT2011002).Project supported by National Natural Science Foundation of China(51177103),Program for Liaoning Innorative Research Team in University(LT2011002). （LT2011002）
