Vibration Characteristics of Different Measuring Points on Surface of Transformer in Operation

XUWei; ZHONG Bin; DU Xiangjing; WANG Naihui; WAN Li; ZHANG Mingzhao; LI Zhong

doi:10.13296/j.1001-1609.hva.2019.11.018

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Vibration Characteristics of Different Measuring Points on Surface of Transformer in Operation

更新时间：2025-04-26

- Vibration Characteristics of Different Measuring Points on Surface of Transformer in Operation
- High VoltageApparatus Vol. 55, Issue 11, Pages: 126-132(2019)
- 作者机构：
  
  1. 国网四川省电力公司乐山供电公司
  2. 华北电力大学电子与通信工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.11.018
  CLC： TM41
- Published：2019
- 稿件说明：
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[1]徐卫,钟斌,杜向京,王乃会,万利,张铭昭,李中.在运变压器表面不同测点振动特性分析[J].高压电器,2019,55(11):126-132.

XUWei, ZHONG Bin, DU Xiangjing, et al. Vibration Characteristics of Different Measuring Points on Surface of Transformer in Operation[J]. High voltageapparatus, 2019, 55(11): 126-132.
[1]徐卫,钟斌,杜向京,王乃会,万利,张铭昭,李中.在运变压器表面不同测点振动特性分析[J].高压电器,2019,55(11):126-132. DOI： 10.13296/j.1001-1609.hva.2019.11.018.

XUWei, ZHONG Bin, DU Xiangjing, et al. Vibration Characteristics of Different Measuring Points on Surface of Transformer in Operation[J]. High voltageapparatus, 2019, 55(11): 126-132. DOI： 10.13296/j.1001-1609.hva.2019.11.018.

摘要

运行中的变压器表面振动信号受多种因素影响

准确把握其特征是振动法分析变压器的基础工作。文中基于小波变换图谱分析技术

分析对比一台正常运行中的变压器表面不同位置、不同时刻振动信号。变压器表面不同位置振动信号分析结果表明

振动基频的2倍频频率分量振幅最大

振动基频2倍频频率分量间相关性最强

并且保持稳定的相位差;不同负载电流条件下的振动信号分析表明

振动信号高频部分主要受源自电流激励的绕组振动影响;同位置不同方向振动信号对比分析说明

垂直表面方向振动最为剧烈且频谱分量最为丰富

各个方向的振动信号中基频的2倍频频率分量振幅最大

相关性最强且相位差保持稳定。文中工作为振动法分析变压器运行状态和故障诊断提供参考。

Abstract

The wavelet transform map analysis technology is employed to analyze and compare the vibration signals at different surface positions and different moments of a transformer in operation. The results show that: 1)the amplitude of the frequency-doubling component of the vibration signal’s fundamental frequency is the largest

and the frequency-doubling components at different positions have the strongest correlation and maintain stable phase difference;2)under different load current

the higher frequency component of the vibration signal is mainly affected by the winding vibration due to current excitation;3)among the vibration signals in different directions at the same position

the vibration signal vertical to surface is the most intense and has the most abundant spectrum components;and 4)for the vibration signals in all directions

the frequency-doubling components have the largest amplitude and strongest correlation and keep stable phase difference. This work may provide reference for operating state analysis of transformerwiththevibrationanalysismethodanditsfaultdiagnosis.

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