短路电流冲击下变压器振动特性研究

Research on vibration characteristic of transformer in short-circuit current impact

针对短路电流的冲击下,变压器振动特性研究,构造了短路电流对变压器振动影响的冲击平台,研究了传递函数相关系数的分布规律以及相关系数阈值选择。在此基础上,通过波形时域分析以及仿真研究,探讨了绕组短路故障对传递函数的影响,得出了预紧力与相关系数的关系,最终,明确了短路电流冲击下变压器振动特性的关系,为进一步利用振动法分析变压器故障奠定了基础。

Under the impact of short-circuit current,the vibration characteristics of transformer is an important feature of vibration analysis method. To study this feature,firstly construct impact platform of influence of shortcircuit current on transformer vibration,and then use this platform to study the distribution rule of correlation coefficient of transfer function and correlation coefficient threshold selection. On this basis,by waveform timedomain analysis and simulation research,explore the effects of winding short-circuit fault on transfer function,and finally study the relationship between the preload and the correlation coefficient,via the above study,define the relationship between the vibration characteristics of transformers under impact of short-circuit current,it laid the foundation for further analysis on transformer fault by vibration method.