浙江电力2025，Vol.44Issue(6)：100-108,9.DOI:10.19585/j.zjdl.202506010
基于多试验工况的低频变压器声纹特性分析
Analysis of acoustic fingerprint characteristics of a low-frequency transformer under diverse test conditions
摘要
Abstract
The acoustic signal of a low-frequency transformer can provide insights into its working condition and ab-normal states.Therefore,it is essential to analyze its acoustic fingerprint characteristics.A 20 Hz low-frequency transformer was chosen,and its acoustic fingerprint signals were collected during no-load,short-circuit,and temperature-rise tests.Through time-domain and frequency-domain analyses,characteristic values such as the root mean square(RMS)value and the high-low frequency ratio were derived.The analysis results show that the core's acoustic fingerprint signal mainly consists of harmonic components at multiples of 40 Hz,while the winding's acous-tic fingerprint signal is predominantly at the fundamental frequency of 40 Hz.The sound intensity resulting from the vibration of the core and winding intensifies with the increase in voltage or current.Moreover,an elevation in oil temperature exacerbates transformer vibration and amplifies noise.Additionally,compared to power-frequency trans-formers,low-frequency transformers exhibit lower noise levels and greater complexity in acoustic fingerprint fre-quencies.These research findings demonstrate that the acoustic fingerprint characteristics of low-frequency trans-formers can effectively mirror their internal states,providing a practical foundation for operating condition identifica-tion and fault diagnosis.关键词
低频输电/变压器/声纹特性/均方根值/铁心振动/绕组振动/变压器温升Key words
low-frequency power transmission/transformer/acoustic fingerprint characteristics/RMS value/core vibration/winding vibration/transformer temperature rise引用本文复制引用
林浩凡,张世杰,赵建永,王博闻,金凌峰,杨智,赵涛..基于多试验工况的低频变压器声纹特性分析[J].浙江电力,2025,44(6):100-108,9.基金项目
国网浙江省电力有限公司科技项目(5211DS23000B) （5211DS23000B）
