日韩精品久久久久久久的张开腿让I日韩精品不卡I男女猛烈无遮挡一进一出视频I婷婷玖玖I亚洲欧美wwwI色婷婷综合久久久久I亚洲成人午夜精品I国产高清不卡视频I综合热久久I亚洲一区二区三区四区I毛片基地视频I天天操夜夜摸I欧美激情网站I欧美亚洲啪啪I亚洲国产成人精品女人I91黄色在线视频I青青草91视频I天天躁日日躁aaaaxxxxI法国做爰xxxⅹ性视频I亚洲天堂资源I色女孩综合网I国产欧美精品一区二区三区I蜜桃色在线I色综合久久88色综合天天I在线看91

    Abstract: Gas-insulated metal-enclosed switchgear (GIS) may occurs mechanical faults such as poor contact of the switch contacts during operation, which leads to abnormal vibration signals. To investigate the characteristics of these vibration signals and achieve fault diagnosis,a GIS experimental platform was established to simulate different contact states, then the collected vibration signals are subjected to wavelet denoising and complementary set empirical mode decomposition(CEEMD), and the sensitive components are extracted for reconstruction through the calculation of correlation coefficients. Ultimately, the results show that under normal conditions, the vibration signal spectrum of GIS contacts is primarily distributed in 100 Hz and its integer multiples. When it contacts faults occur, the high-frequency components in the vibration signal spectrum increase significantly and a distinct triple harmonic component emerged. Moreover, the amplitude of the component will increase as the degree of the fault intensifies. By reconstructing the fault signal through this rule, the high-frequency impact components contained in the fault signal can be clearly presented.

    Key words: gas-insulated metal-enclosed switchgear(GIS); vibration signal; complementary set empirical mode decomposition(CEEMD);wavelet denoising; fault monitoring