计及动态疲劳损伤特征的变压器非接触式激光测振技术  

Non-contact Laser Vibration Measurement Technology of Transformer Considering Dynamic Fatigue Damage Characteristics

作　　者：陆旭锋 沙杰 董海庆 LU Xufeng;SHA Jie;DONG Haiqing(Jiading Power Supply Company of State Grid Shanghai Electric Power Company,Shanghai 201899,China)

机构地区：[1]国网上海市电力公司嘉定供电公司,上海201899

出　　处：《机械制造与自动化》2025年第2期262-265,307,共5页Machine Building & Automation

摘　　要：为了准确测量变压器的振动情况,提出一种计及动态疲劳损伤特征的变压器非接触式激光测振技术。根据变压器的硅钢板和线圈在磁场中的受力情况,得到变压器振动信号的产生机理,通过分析铁芯和线圈的振动传递途径,分析变压器振动传递途径。利用矩阵描述变压器的频率响应函数,通过计算频率响应函数的虚部差值,得到变压器的运行状态,结合衰减系数,提取出变压器的动态疲劳损伤特征。通过设计变压器非接触式激光测振仪,实现变压器的非接触式激光测振。实验结果表明:本技术能够根据变压器的疲劳损伤特征,测量出振动信号,并将测振精度提高到90%以上。In order to accurately measure the vibration of transformers,a non-contact laser vibration measurement technology for transformers considering dynamic fatigue damage characteristics is proposed.Based on the force acting on the silicon steel plate and coil of the transformer in the magnetic field,the generation mechanism of the transformer vibration signal is obtained.By analyzing the vibration transmission pathways of the iron core and coil,the vibration transmission pathways of the transformer are studied.A matrix is applied to describe the frequency response function of a transformer,the operating state of the transformer is obtained by calculating the imaginary part difference of the frequency response function.Combined with the attenuation coefficient,the dynamic fatigue damage characteristics of the transformer are extracted.A non-contact laser vibration meter for transformers is designed to achieve the non-contact laser vibration measurement of transformers.The experimental results show that the proposed technology can measure vibration signals based on the fatigue damage characteristics of transformers,and raise the vibration measurement accuracy up to over 90%.

关 键 词：疲劳损伤 特征提取 非接触式 变压器 激光测振 信号传递 

分 类 号：TN249[电子电信—物理电子学]