并联电抗器铁心振动的模型实验与仿真研究

摘要

并联电抗器作为无功补偿设备,补偿电力系统的无功容量.为了保持并联电抗器的电抗值具有良好的线性度,其铁心通常采用多气隙结构,这使得并联电抗器在正常工况下振动幅度较大.为了研究并联电抗器铁心振动的影响因素,本文设计制作了一台并联电抗器试验模型,建立了并联电抗器铁心振动分析的电磁-机械耦合模型.计算得到了不同工况下并联电抗器铁心磁场、麦克斯韦力、振动位移和加速度的空间分布,并将计算结果与实验数据进行了对比.分析了麦克斯韦力和铁心磁致伸缩效应对并联电抗器铁心振动的影响.%As a reactive power compensator,shunt reactor supplies reactive power for the power system. In order to keep the reactance a favorable linearity, the iron core of shunt reactor usually adopts the multi-air gap structure, which gives rise to a larger vibration in normal working condition. To study the influence factors of the iron core vi-bration for shunt reactor,an experimental model shunt reactor has been fabricated in this paper,also the magneto-mechanical model of the iron core vibration for shunt reactor is established. The space distribution of magnetic field,Maxwell force and vibration displacement and acceleration are calculated for the iron core of shunt reactor, after which the data of experiment and simulation are compared. The influence of Maxwell force and magnetostric-tion on iron core vibration of shunt reactor is analyzed. The result shows that the influence of Maxwell force and magnetostriction on iron core vibration is dependent on the working condition of shunt reactor.