220 kV自耦变压器声纹测试分析  

Test and Analysis of 220 kV Autotransformer s Voiceprint

作　　者：李勇 许洪华 何萍 尹来宾 Li Yong;Xu Honghua;He Ping;Yin Laibin(Nanjing Power Supply Branch,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing Jiangsu 210019,China)

机构地区：[1]国网江苏省电力有限公司南京供电分公司,江苏南京210019

出　　处：《电气自动化》2023年第2期18-21,24,共5页Electrical Automation

基　　金：江苏省电力有限公司重点科技项目(J2021053)。

摘　　要：自耦变压器声纹特性与运行工况密切相关。为了对自耦变压器运行过程中的声纹特性深入研究,在搭建声纹数据采集平台的基础之上,采集变压器五种工况下的声纹数据,从时域、频域以及时频域三个角度进行研究分析。结果表明,变压器稳态时的声纹主频为100 Hz,暂态时的声纹主要集中于300 Hz、400 Hz等频段,奇次谐波、高频分量以及时频熵等特征在不同运行工况下有较大区别。研究结果为基于声纹的电力变压器状态监测和故障诊断测提供支撑。The voiceprint characteristics of autotransformer are closely related to operating conditions.In order to conduct in-depth research on the voiceprint characteristics of the autotransformer during operation,based on the establishment of a voiceprint data acquisition platform,the voiceprint data of the transformer under five working conditions were collected,studied and analyzed from three angles of time domain,frequency domain and time-frequency domain.The results show that the dominant frequency of the transformer s voiceprint in the steady state is 100 Hz,and the voiceprint in the transient state is mainly concentrated in the frequency bands of 300 Hz and 400 Hz.The characteristics of odd harmonic,high-frequency component and time-frequency entropy are quite different under different operating conditions.The research results provide support for power transformer condition monitoring and fault diagnosis based on voiceprint.

关 键 词：电力变压器 多物理场耦合 振动 声纹 故障特征 

分 类 号：TM41[电气工程—电器]