双级磁阀可控电抗器振动仿真与试验

Vibration Simulation and Experiment of Two-stage Magnetic-valvecontrollable Reactor

双级磁阀可控电抗器铁心振动主要取决于硅钢片的磁致伸缩效应,文中从内能机械能守恒的角度,对铁心磁致伸缩进行了理论推导。在瞬态电磁场和结构力场的基础上,应用有限元计算软件COMSOL对一台5 400 var的双级磁阀可控电抗器进行了仿真研究,仿真结果中旁轭点的振动加速度呈明显的周期性,并且振动主要集中在100 Hz,与理论推导相一致。并搭建双级磁阀电抗器振动试验平台,进行了试验研究,仿真数据和试验测量结果基本吻合,验证了仿真模型的正确性,同时实验结果表明磁阀处的振动明显大于旁轭处。文中模型的建立对于电抗器设计阶段计算铁心振动大小以及降振研究具有积极意义。

The core vibration of the two-stage magnetic-valve controllable reactor depends on the magnetostriction of silicon steel sheets. In this study, the theoretical derivation of magnetostrictive effect of the core was performed based on conservation of internal energy and mechanical energy. A two-stage magnetic-valve controllable reactor with capacity of 5 400 var was modeled and simulated by using the finite element software COMSOL. Simulation results show that the acceleration of side yoke point is of obvious periodicity and the vibration mostly focuses on 100 Hz, which is consistent with the theoretical analysis. A platform was built to conduct vibration test for two-stage magnetic-valve reactor, and the experimental data agree with the simulation results, verifying the correctness of the simulation model. In addition, experimental results show that the vibration at magnetic valve is significantly greater than the vibration at side yoke. The present model may facilitate calculation of core vibration and vibration reduction in design phase of reactor.