直流偏磁下磁饱和电抗器铁心电磁振动分析  

Analysis on electromagnetic vibration of magnetic saturation reactor iron-core under DC magnetic bias

作　　者：闫荣格[1] 郜玉香 贲彤 陈俊杰 YAN Rong-ge;GAO Yu-xiang;BEN Tong;CHEN Jun-jie(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室河北工业大学,天津300130

出　　处：《电工电能新技术》2018年第8期27-33,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51237005;51777054)

摘　　要：磁饱和电抗器能够根据系统传输功率的大小平滑地调节所补偿的无功功率,在电力系统等多种行业得到了广泛的应用。由于磁饱和电抗器铁心磁阀结构的特殊性以及交直流共同激励的工作方式使得其振动噪声相对于其他电抗器更加明显。本文对直流偏磁引起磁饱和电抗器铁心电磁振动问题进行分析。首先对电抗器铁心固有频率进行仿真及模态实验,得到电抗器的各阶固有频率及振型,并得出振动测试关键点位置;然后基于有限元分析建立了考虑电磁力与磁致伸缩效应作用的电磁-机械耦合模型,得到了不同直流偏磁下测试点振动位移时域和频域波形,为在设计上减少电抗器振动噪声提供理论依据与实验参考。Magnetic saturation reactor can smoothly adjust the compensatory reactive power based on the size of the system transmission power,and it has been widely used in many industries such as electrical power system. Due to the particularity of magnetic saturation reactor iron-core magnetic-valve structure and the common excitation working mode of AC and DC,the vibration noise of magnetic saturation reactor is more obvious than other reactors. For this purpose,the electromagnetic vibration problem on magnetic saturation reactor iron-core caused by DC magnetic bias is analyzed in this thesis. First of all,the reactor iron-core natural frequency simulation and modal experiments are made to obtain the reactor natural frequency and mode of each order,and the test key points of vibration can be made as well. Then,based on the finite element analysis method,electromagnetic-mechanical coupling model is established considering electromagnetic force and magnetostrictive effect. The time-domain and frequency-domain waveforms of vibration displacement at measuring points under different DC magnetic bias are obtained in the end.This thesis provides a theoretical basis and experimental reference to reduce the reactor vibration noise.

关 键 词：磁饱和电抗器 模态实验 直流偏磁 电磁振动 

分 类 号：TM474[电气工程—电器]