动静态力共同作用对电抗器铁心振动影响  

Influence of Dynamic and Static Forces on Vibration of Reactor Core

作　　者：闫荣格[1,2] 程云飞 Yan Rongge;Cheng Yunfei(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130 China;Hebei Provincial Key Laboratory of Electromagnetic Field and Electrical Appliance Reliability 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 [2]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300130

出　　处：《电工技术学报》2023年第4期1104-1114,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51777054)。

摘　　要：带气隙结构的并联电抗器铁心在实际运行中,除受到螺杆与夹件施加的静态压紧力外,也会受到磁致伸缩力与铁心饼间麦克斯韦力的动态力作用,动静态力都对铁心的磁性能产生影响,进而影响电抗器铁心振动特性。目前的研究主要集中于静态压紧力对硅钢片磁特性以及电抗器铁心振动特性的影响,动态力对其影响的研究未见报道,更没有考虑共同作用的影响。该文首先测量动静态力共同作用下硅钢片的磁特性曲线;其次建立考虑动静态力共同作用的电抗器电磁场-机械场双向耦合模型,对并联电抗器进行电磁振动计算;最后搭建振动测量实验平台,实验结果验证了所建模型的正确性与精准性,为进一步分析电抗器振动问题提供理论支持和分析方法。In actual operation,the shunt reactor core with air gap structure is not only subjected to the static compression force exerted by the screw and the clamp,but also to the dynamic force of the magnetostrictive force and the Maxwell force between the core discs.It affects the magnetic properties of the iron core,which in turn affects the vibration characteristics of the reactor.The current research mainly focuses on the influence of static compression force on the magnetic properties of silicon steel sheets and the vibration characteristics of the reactor.The research on the influence of dynamic force has yet to be reported,let alone the influence of joint action.Considering the influence of the dynamic and static forces on the magnetic properties of the silicon steel sheets,its influence on the electromagnetic vibration of the reactor core is further analyzed.Firstly,a measurement platform for the magnetic properties of silicon steel sheets was built,and the magnetization and magnetostrictive properties under the combined action of dynamic and static forces were measured.When only considering the influence of static pressing force,the magnetic permeability decreases,and the magnetostrictive effect weakens.When considering the combined influence of dynamic and static forces,the magnetic permeability increases,and the magnetostrictive effect is further weakened.Secondly,the electromagnetic field-mechanical two-way coupling model of the reactor is established.Considering the influence of dynamic and static forces,the energy function of the reactor system is established,and the terms in the energy function are expanded according to the rectangular coordinate system.The three-dimensional axisymmetric field is discretized using tetrahedral elements.The functional variational problem is transformed into a multivariate function extremum problem,and the partial derivatives of the energy function to the magnetic vector potential component and the displacement vector component at each node are all zero.In the calculation pro

关 键 词：并联电抗器 动态力 磁特性 电磁场-机械场模型 

分 类 号：TM47[电气工程—电器]