Method for detecting the pollution degree of naturally contaminated insulator based on hyperspectral characteristics  

作　　者：Chengfeng Yin Zhang Xiao Yujun Guo Chaoqun Shi Xueqin Zhang Guangning Wu 

机构地区：[1]School of Electrical Engineering,Southwest Jiaotong University,Chengdu,China

出　　处：《High Voltage》2021年第6期1031-1039,共9页高电压（英文）

基　　金：the National Natural Foundation of China under Grant 51907168;the Science and Technology Project of STATE GRID Corporation of China under Grant 521104190007;the Sichuan Science and Technology Program(Outstanding Youth Science and Technology talents)under Grant 2020JDJQ0039;which ensured the successful completion of their experiment.

摘　　要：Insulator pollution degree detection is of great significance for preventing a flashover.Equivalent salt deposit density,leakage current,and surface pollution layer conductivity are commonly used to describe insulator pollution degree;however,all these parameters have limitations in field application and real‐time monitoring.Non‐contact detection methods,such as infrared thermal imaging and ultraviolet imaging,only image insulators in a specific band,which makes the extracted features limited.Hyperspectral technology is the new comprehensive image data technology based on imaging spectroscopy that has the advantages of multiband high resolution.Therefore,a method based on hyperspectral image and spectral characteristics is proposed to fully characterize natural pollution in-formation and accurately detect the pollution degree of insulators.The hyperspectral spectral line characteristics,image texture,and colour characteristic data of insulators were extracted and fused and then used to establish the pollution degree detection model on the basis of integrated learning classification algorithms.The results show that the model based on fusion data has an accuracy rate of 95.0%,which is more accurate than the model based on spectral line features only.Consequently,hyperspectral technology can realize the non‐contact detection of pollution degree and provide some guidance for cleaning the contamination of external insulation.

关 键 词：INSULATOR CHARACTERISTICS SPECTRAL 

分 类 号：TM21[一般工业技术—材料科学与工程]