Defects Detection Method for Composite Insulators Based on Frequency Thermal Characteristics Imaging

被引：0
|
作者：
Liu L. [1 ]
Guo C. [2 ]
Wang L. [1 ]
Mei H. [1 ]
Yu H. [2 ]
Ma Y. [2 ]
机构：
[1] Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province
[2] Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming, 650200, Yunnan Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 08期
关键词：
Active infrared thermography; Blind frequency; Composite insulator; Defect detection; Differential phase spectrum; Frequency thermal characteristics imaging;
D O I：
10.13334/j.0258-8013.pcsee.182392
中图分类号：
学科分类号：
摘要：
In order to eliminate the potential threat of the composite insulators with internal defects to the safe operation of power systems, a detection method for composite insulators based on frequency thermal characteristics imaging was presented in this paper. In this method, the inspected insulators were excited by a heat pulse while the dynamic surface temperature distribution was recorded by an IR camera. Discrete Fourier transformation was used for analyzing the frequency domain characteristics of the surface temperature change, and the defects can be detected by identifying the abnormal regions in amplitude and phase thermal image sequences. The porosity and delamination defects at different depths in the sheath of composite insulators were detected by experiments, which proved the advantage of low frequency-domain thermal images in detecting the deeper defects. Finally, the variation laws of the differential phase spectra of the defects with different depths were analyzed, and the blind frequency in differential phase spectrum was used to estimate the depth of the defects. Compared with other defect detection technologies, pulsed phase thermography has a broad application prospect, with the characteristics of non-contact measurement, fast detection speed, visual results and quantitative measurement capability. © 2019 Chin. Soc. for Elec. Eng.
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页码：2498 / 2505
页数：7
相关论文
共 25 条
  • [1] Guan Z., Peng G., Wang L., Et al., Application and key technical study of composite insulators, High Voltage Engineering, 37, 3, pp. 513-519, (2011)
  • [2] Liang X., Gao Y., Wang J., Et al., Rapid development of silicone rubber composite insulator in China, High Voltage Engineering, 42, 9, pp. 2888-2896, (2016)
  • [3] Liang X., Bao W., Gao Y., Decay-like fracture mechanism of silicone rubber composite insulator, IEEE Transactions on Dielectrics and Electrical Insulation, 25, 1, pp. 110-119, (2018)
  • [4] Xie C., Zhang Y., Hao Y., Et al., Application of Ultrasonic flaw detector to internal defects in composite insulators, High Voltage Engineering, 35, 10, pp. 2464-2469, (2009)
  • [5] Wang L., Li A., Cheng L., Et al., Microwave-based non-destructive testing method on composite insulators, High Voltage Engineering, 41, 2, pp. 584-591, (2015)
  • [6] Qaddoumi N., El-Hag A.H., Al Hosani M., Et al., Detecting defects in outdoor non-ceramic insulators using near-field microwave non-destructive testing, IEEE Transactions on Dielectrics and Electrical Insulation, 17, 2, pp. 402-407, (2010)
  • [7] Su F., Jia Y., Wang Q., Et al., Verification on effectiveness of steep-front wave impulse voltage test to find internal defects inside composite insulators, Power System Technology, 27, 1, pp. 41-43, (2003)
  • [8] Chen Y., Liu Y., Shen J., Et al., Inner-defect detection method for composite insulators, Power System Technology, 30, 12, pp. 58-63, (2006)
  • [9] Deng H., Lu Q., Chen L., Et al., Detection for composite insulator based on ultrasonic guided wave, High Voltage Engineering, 42, 4, pp. 1236-1244, (2016)
  • [10] Yan W., Wang D., Li W., Et al., Application of X-ray technology in composite insulators defect diagnosis, High Voltage Apparatus, 48, 10, pp. 58-66, (2012)
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