考虑实际工况下串联铁心电抗器的振动研究

Research on Vibration of Series Iron-core Reactors Under the Practical Working Conditions

串联铁心电抗器广泛应用于电力系统,但其噪声明显高于变压器。电抗器振动主要来源于气隙处的电磁力和硅钢片的磁致伸缩力,使铁心在实际工作状态中时刻存在应力,影响着硅钢片的磁特性。首先测试了硅钢片在不同应力下的磁特性曲线;然后,在考虑磁致伸缩效应的基础上建立了电抗器的电磁-机械双向耦合模型;最后,通过仿真计算出电抗器铁心的磁场及振动的分布情况。结果表明,总的振动效果并非2个力单独作用时的简单叠加。

Series iron-core reactors are widely used in power systems,but the noise is significantly higher than the transformer. The reactor vibration mainly comes from the electromagnetic force at the air gap and the magnetostrictive force of the silicon steel sheet,so that the iron-core always has stress under the practical working conditions,which affects the magnetic properties of the silicon steel sheet. Firstly,the magnetic properties of silicon steel under different stresses were tested. Then an electromagneto-mechanical two-way coupled numerical model for reactor considering magnetostrictive effect was proposed. Finally,the reactor iron-core magnetic field and vibration distribution were worked out by simulation. The results show that the total vibration effect is not a simple superposition of two forces acting alone.