摘要
针对转子动偏心状态下某大型水轮发电机在不同励磁电流工况下的电磁振动问题,采用ANSYSRmxprt组件建立2D瞬态电磁仿真模型,通过麦克斯韦应力张量法分别求出水轮发电机定子铁芯齿端在25%、50%、75%、100%四种不同励磁电流激励下所受的电磁力密度频域分布;最后将电磁力密度各阶谐波加载到3D定子系统齿端,通过2D电磁与3D结构谐响应耦合分析获得转子动偏心状态下水轮发电机定子支座在空载变励磁工况下的振动频域分布。研究发现,水轮发电机转子偏心工况下电磁力波主要集中在一倍转频上,而电磁振动以一倍转频为主,同时随着励磁电流减少,电磁力密度和电磁振动逐渐降低。
Aiming at the electromagnetic vibration of a large hydro-generator with eccentric rotor under different excitation current,the 2Delectromagnetic transient analysis model was established by using ANSYS-Rmxprt.Under 25%,50%,75% and 100% excitation current,the electromagnetic force wave was excited by the Maxwell dimension tensor method.Finally,the vibration frequency and vibration characteristics of the stator support of the rotor eccentric state were obtained by using the harmonic response analysis.It was found that the electromagnetic force wave on the stator tooth face is mainly concentrated in the eccentric condition of the rotor of the turbine generator.The electromagnetic force is mainly concentrated in the one times of rotating frequency while the electromagnetic vibration is the main one.With the decrease of the excitation current,the electromagnetic force density and electromagnetic vibration decrease gradually.
出处
《水电能源科学》
北大核心
2017年第2期174-177,65,共5页
Water Resources and Power
关键词
水轮发电机
麦克斯韦应力
径向电磁力波
电磁振动
hydro-generator
Maxwell stress
radial electromagnetic force wave
electromagnetic vibration
作者简介
寇攀高（1985-），男，博士，研究方向为水轮发电机组控制与故障诊断，Email：635359794@qq．com
通讯作者：李超顺（1983-），男，博士、副教授，研究方向为水电机组状态监测、故障诊断与优化控制，Email：csli@hust．edu.cn
