变压器绕组振动特性研究

Abstract

在理论分析影响变压器绕组振动各因素的基础上，利用ANSYS建立变压器有限元模型仿真分析，验证了不同的预紧力大小对绕组振动固有频率的影响。利用变压器振动在线监测系统，对变压器油箱表面测得的振动信号进行了研究，实验验证了变压器绕组振动主要集中在基频100 Hz处，且基频幅值与负载电流的平方满足正比例关系。 On the basis of theoretical analysis of various factors affecting the vibration of transformer windings, the finite element model simulation analysis of the transformer was built by ANSYS. The effect of different precompression on the natural frequency of winding vibration was verified. The vibration signal of the transformer tank surface was studied by the on-line monitoring system of the transformer vibration. The experimental results showed that the vibration of the transformer windings was concentrated in the fundamental frequency 100 Hz. The amplitude of the fundamental frequency was proportional to the square of load current.