电瓷避雷器Issue(3)：120-127,8.DOI:10.16188/j.isa.1003-8337.2025.03.015
GIS盆式绝缘子检测用超声导波信号降噪方法研究
Denoising Methods for Ultrasonic Guided Wave Signals of GIS Basin-Type Insulator Detection
摘要
Abstract
Basin insulators are the key component of GIS circuit breakers.The defects such as bubbles,cracks and surface fouling generated during production and transportation will cause surface flashover and other faults of GIS and reduce the reliability of equipment operation.The ultrasonic guided wave method is used to detect the defects of GIS basin insulators.Firstly,a three-dimensional simulation model of basin insulators is constructed in Comsol,and ultrasonic excitation points and receiving points are set to conduct ultrasonic guided wave simulation research on intact and defective insulators respectively.When there are defects,the received signal amplitude is smaller than that of intact insulators.The effectiveness of ultrasonic guided wave method is verified.After that,5 dB Gaussian white noise is added to the simu-lation signals respectively,and the noisy signals are processed by wavelet,VMD and OMP denoising methods respectively.All the three methods can achieve effective denoising.After that,the ultrasonic guided wave test platform of the basin insulator was built,and ultrasonic signals were obtained through the ultrasonic guided wave experiment.Gaussian white noise of-10,-5,0,5 and 10 dB were added to the signals respectively.After calculating the reconstruction error,the noise reduction effect of OMP algorithm was better than that of wavelet and VMD.关键词
GIS/盆式绝缘子/降噪方法/正交匹配追踪/变分模态分解Key words
GIS/basin-type insulator/denoising method/orthogonal matching tracking/variational mode decomposition引用本文复制引用
李阳,刘君伟,徐兴龙,和娟平,高恩广,王哲,陈科达..GIS盆式绝缘子检测用超声导波信号降噪方法研究[J].电瓷避雷器,2025,(3):120-127,8.基金项目
云南电网有限责任公司2022 年第一批(补充)科技项目(编号:051400KK52220003).Project supported by Science and Technology Project of Yunnan Power Grid Co.,Ltd.(No.051400KK52220003). （补充）
