High Voltage Cable X-Ray Digital Image Depth Processing and Technology of Buffer Layer Defect Intelligent Recognition

Liu, Sanwei; Zhang, Jun; Xie, Yi; Duan, Jianjia; Huang, Fuyong; Duan, Xiaoli; Zeng, Zeyu

doi:10.1109/aiea51086.2020.00039

Cited by 8 publications

(2 citation statements)

References 2 publications

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“…The size and density of this type of cable are shown in Table II. The densities of copper and aluminum in the cable are relatively large, while the densities of materials such as the semiconductor layer, XLPE insulation, and buffer water barrier tape are relatively similar [9], [10]. The structural characteristics of the water blocking tape are shown in Figure 3.…”

Section: A Structural Of Hv Cables Buffer Layermentioning

confidence: 99%

Technology for the Detection of Ablation Defects in Buffer Layers of High-Voltage Cables

Huang

Tong³

et al. 2022

IEEE Access

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This article discusses the main structure of HV cables as well as the characteristics of buffer layers and detection of ablation defects. To effectively detect ablation defects in the buffer layer, two approaches, terahertz time-domain measurements and commercial computed tomography (CT), were used in the laboratory to evaluate samples of cable with these defects and compare different preset conditions for detecting defects. The test results showed that the terahertz time domain measurement method was more sensitive than CT to moisture intrusion into the cable, but terahertz wave energy was reflected on the surface of the aluminum sheath of the cable and could not penetrate the sheath, thus, it was difficult to use this method to detect internal defects. The commercial CT method used X-rays to penetrate the aluminum sheath, and it could effectively obtain data for the three-dimensional reconstruction of each layer of material, other than the copper core. The structure of the cable was mapped through three-dimensional reconstruction using VGstudio Max software, and the three-dimensional map and gray value analysis were combined. The results confirmed that defects with different densities in the buffer layer could be detected by commercial CT. Thus, commercial CT detection methods provide an effective solution for identifying hidden defects in cables and have profound practical significance for the development of methods to detect defects when cables are in use.

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Section: A Structural Of Hv Cables Buffer Layermentioning

confidence: 99%

Technology for the Detection of Ablation Defects in Buffer Layers of High-Voltage Cables

Huang

Tong³

et al. 2022

IEEE Access

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“…The acquired raw images are deeply processed. The grayscale value range of a grayscale image is compressed to a range that can be recognized by the human eye [8] . As shown in figure 1, 1-X-ray machine; 2-Flat panel detector; 3-Portable power module; 4-Wireless communication components; 5-X-ray machine control system; 6-Cable grayscale image receiver; 7-Cable Grayscale image display tablet; 8-special fixing bracket; 9cable body.…”

Section: Digital Radiography Nondestructive Test Principlementioning

confidence: 99%

Research on Defects of High Voltage Cable Fusion Joint Using XLPE Insulation Material

Liu

Duan

et al. 2022

J. Phys.: Conf. Ser.

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High-voltage cable fusion joints are made on site. Affected by environmental conditions, fusion joints are prone to small defects that are not easy to find, resulting in frequent accidents after the joints are put into operation. There is currently no effective method to detect small defects inside the joint. Therefore, this paper proposes to use digital radiography nondestructive test technology to detect the main insulation and conductor recovery process of high-voltage cable fusion joints. The results show that the digital radiography nondestructive test method can effectively find defects such as microporous bubbles, conductor bending, and eccentricity in the main insulation of XLPE fusion joints. The on-site anatomy demonstrates the accuracy of the test results, and the digital radiography nondestructive test can effectively detect the defects of high-voltage cable fusion joints. Experiments have verified that the decrease of cross-linked pipe temperature and nitrogen pressure can lead to the generation of microporous bubbles in the XLPE main insulation. For conductor bending and eccentricity defects, the limit value of the welding conductor bending gap is 11mm through simulation calculation.

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XLPE cable joint defects measurement method based on point cloud remapping

Deng,

Liu

et al. 2024

Measurement

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High Voltage Cable X-Ray Digital Image Depth Processing and Technology of Buffer Layer Defect Intelligent Recognition

Cited by 8 publications

References 2 publications

Technology for the Detection of Ablation Defects in Buffer Layers of High-Voltage Cables

Technology for the Detection of Ablation Defects in Buffer Layers of High-Voltage Cables

Research on Defects of High Voltage Cable Fusion Joint Using XLPE Insulation Material

XLPE cable joint defects measurement method based on point cloud remapping

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