摘要
换流变压器辐向上网侧-阀侧-调压绕组多层绕组结构紧密连接,结构间会产生耦合振动效应,从而影响箱体振动响应特性。目前绕组辐向结构耦合振动理论并不完善,相关振动模型不能有效解释绕组振动时多频响应现象。为解决上述问题,本文考虑绕组振动产生-传递途径中结构耦合作用,将耦合振动过程简化为简谐载荷激励作用下的拱形绕组振动问题,进而提出绕组辐向耦合振动非线性振动模型,利用多尺度方法推导耦合振动加速的数学表达式,并通过理论分析与试验证明模型的正确性。研究结果表明:50 Hz工频电流激励下,绕组振动主频集中于100 Hz,在结构耦合作用下出现200 Hz、300 Hz等多倍频谐波分量,还存在少量150 Hz、250 Hz等50 Hz奇数倍谐波成分。研究结论为换流变压器振动检测技术、结构减震降噪设计等工程应用提供理论参考。
The multi-layer winding structure of the radial converter transformer grid side-valve side-voltage regulating winding is closely connected.When the windings vibrate,a coupling vibration effect will occur between the structures,thus affecting the vibration response characteristics of the box.At present,the theory of coupled vibration of winding radial structures is not perfect,and the relevant vibration models cannot effectively explain the multi-frequency response phenomenon when windings vibrate.To solve the above problems,this paper considers the structural coupling effect in the generation and transmission path of winding vibration,simplifies the coupled vibration process into the arch winding vibration problem under the action of simple harmonic load excitation,and then proposes a nonlinear vibration model of winding radial coupled vibration.The multi-scale method is used to derive the mathematical expression of coupled vibration acceleration,and the correctness of the model is proved through theoretical analysis and experiments.The research results show that under the excitation of 50 Hz power frequency current,the main frequency of winding vibration is concentrated at 100 Hz.Under the action of structural coupling,multi-octave harmonic components such as 200 Hz and 300 Hz appear,and there are also a small number of odd harmonics of 50 Hz such as 150 Hz and 250 Hz.The research conclusions provide theoretical references for engineering applications such as converter transformer vibration detection technology and structural vibration and noise reduction design.
作者
蒋培榆
方舒淇
钱梦昊
黎佳龙
王黎明
唐仙
尹芳辉
JIANG Peiyu;FANG Shuqi;QIAN Menghao;LI Jialong;WANG Liming;TANG Xian;YIN Fanghui(Tsinghua Shenzhen International Graduate School,Shenzhen 510000,China)
出处
《电工电能新技术》
CSCD
北大核心
2024年第10期62-70,共9页
Advanced Technology of Electrical Engineering and Energy
基金
广东省基础与应用基础研究基金(2023A1515110519)
国家电网有限公司科技项目(5500-202317524A-3-2-ZN)
清华大学深圳国际研究生院交叉科研创新基金(JC2022012)。
关键词
换流变压器
绕组振动
辐向特性
多倍频现象
converter transformer
winding vibration
radial characterization
multi-frequency phenomena
