文献类型：期刊文献

英文题名：Nondestructive Evaluation of Composite Bonding Structure Used in Electrical Insulation Based on Active Infrared Thermography

作者：Guo, Chenjun[1,2];Liu, Lishuai[3];Mei, Hongwei[2];Tu, Yanxin[2];Wang, Liming[2]

机构：[1]China Southern Power Grid Co, Kunming Power Supply Co, Kunming 650011, Yunnan, Peoples R China;[2]Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Engn Lab Power Equipment Reliabil Complicated Coa, Shenzhen 518055, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：16

外文期刊名：POLYMERS

收录：;EI(收录号：20223712728375);WOS:【SCI-EXPANDED(收录号:WOS:000845653100001)】；

基金：This research was supported by the National Key Research and Development Plan of China, grant number 2021YFC3001802; the National Natural Science Foundation of China, grant number 12104155; the Shanghai Sailing Program, grant number 21YF1408900; and the Natural Science Foundation of Shanghai, grant number 21ZR1417100.

语种：英文

外文关键词：active infrared thermography; live detection; electrical equipment; composite insulation; silicone rubber; fiber reinforced plastic; differential thermal image; frame difference thermal image

摘要：Nondestructive testing and evaluation of composite insulating components of electrical equipment is extremely necessary for assuring the safety of a power system. However, most existing nondestructive testing methods are not applicable for fast and effective live detection due to their time-consuming operation, high cost, and contact or near-field measurement. In this work, the effectiveness of active infrared thermography was investigated for detecting defects in silicone rubber (SIR)-fiber-reinforced plastic (FRP) bonding structures, which have been commonly used in insulating components of power equipment. The effectiveness of differential thermal image for enhancing the contrast of defective and sound areas and eliminating additive noise was demonstrated. Particularly, frame difference thermal image obtained by subtracting two differential thermal images extracting from respectively before and after the contrast inversion was proposed to enhance defect identification. The results revealed that defects of various sizes and depths such as voids, cracks, and interface disbonding of the SIR-FRP bonding structure were accurately detected by thermographic data. With the advantages of a quick and simple process, safety, universal applicability, visual results, far-field measurement, and quantitative defect estimation capabilities, active infrared thermography would be quite promising for live detection of electrical equipment.