Damage Characteristics of OPGWs Under Consecutive Lightning Strikes Based on a Coupled Arc-Thermal-Electric Simulation

Sun, Jinru; Li, Shu; Qin, Qing; Guo, Youguang; Yao, Xueling; Wu, Yi

doi:10.1109/tpwrd.2022.3227165

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The functions implemented by the system are modularized, and the main modules in the hardware circuit include the microcontroller control module, AD acquisition module, data storage module, signal conditioning module, wireless transmission module, and more. (5) Then, the solution region and boundary conditions are set, and Equation ( 5) is solved numerically by iterative finite element analysis. Finally, the leakage magnetic field distribution of the defective overhead ground wire is calculated.…”

Section: Overhead Ground Wire Defect Detection Device Designmentioning

confidence: 99%

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A Novel Defect Detection Method for Overhead Ground Wire

Xiao,

Xiong,

Zhang

et al. 2023

Sensors

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Overhead ground wires typically have strong axial tension and are prone to structural defects caused by corrosion and lightning strikes, which could lead to serious safety hazards. Therefore, it is important to detect defects accurately and quickly to avoid those problems. Existing defect detection methods for overhead ground wires are mainly traditional metal defect detection methods, including eddy current detection, ultrasonic detection, and manual visual inspection. However, those methods have problems of low detection efficiency, high environmental requirements, and insufficient reliability. To solve the above problems, this paper studies a novel type of defect detection technology for overhead ground wire. Firstly, the magnetic leakage characteristics around the defects of overhead ground wires are analyzed, and the defect detection device is designed. Then, the influence of air gap, lift-off distance, defect width, and cross-sectional loss rate on the magnetic flux leakage signal is studied, a novel defect detection method for overhead ground wire is proposed, and experimental verification is carried out. The results show that the proposed method can accurately locate and quantify the defect, which has the advantages of good reliability and high efficiency and lays the foundation for preventing accidents caused by defective overhead ground wires.

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Section: Overhead Ground Wire Defect Detection Device Designmentioning

confidence: 99%

“…The axial tension of the overhead ground wire structure will have a large stress concentration at the defects’ places. If the defects cannot be found and repaired in time, it will eventually lead to the fracture and fall of the overhead ground wire, resulting in great economic loss and serious electric accidents [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Defect Detection Method for Overhead Ground Wire

Xiao,

Xiong,

Zhang

et al. 2023

Sensors

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Structure optimization for downlead cable of 110-kV insulated optical-unit phase conductor

Liu,

Mei,

Luo

et al. 2024

Electr Eng

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Currently, the structure of insulated optical-unit phase conductor (IOPPC) is gradually being employed in 10 kV and 110 kV power transmission lines, replacing the existing Optical Fiber Composition Phase Conductor (OPPC) structures. However, incidents of lines breakage have occurred in the widespread application of IOPPC downlead cables in 110 kV lines. Addressing these breakage incidents, this paper proposes a modi ed structure for the IOPPC downlead cable. Initially, nite element method is employed to calculate the electric eld intensity of both the traditional and modi ed IOPPC downlead cable structures under a 110 kV voltage, providing preliminary validation of the effectiveness of the proposed modi cation. Subsequently, power frequency withstand tests are conducted to further validate and optimize the modi ed structure. Simulation results indicate that the electric eld strength is notably higher in the air region near the parallel groove clamp of the traditional structure. The addition of a semiconductor shielding layer in the modi ed structure effectively suppresses the increase in electric eld strength. Power frequency withstand test results further con rm the inhibitory effect of the semiconductor shielding layer on electric eld intensity. However, experimental observations reveal occurrences of discharge at the cutoff point of the semiconductor shielding layer. Finally, optimization of the modi ed structure successfully eliminates the occurrence of discharge at the cutoff point of the semiconductor shielding layer. The nal chapter showed the withstand voltage test speci ed by IEC standard for the IOPPC downlead cable with the structure of the hollow aluminum ball wrapping, con rming the effectiveness of the modi ed design.

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Investigation of Damage Mechanisms in Cfrp Composites with Fastener Under Coupled Arc Heat Flux and Current Effects

Guo,

Sun,

et al. 2024

Preprint

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Damage Characteristics of OPGWs Under Consecutive Lightning Strikes Based on a Coupled Arc-Thermal-Electric Simulation

Cited by 3 publications

References 23 publications

A Novel Defect Detection Method for Overhead Ground Wire

A Novel Defect Detection Method for Overhead Ground Wire

Structure optimization for downlead cable of 110-kV insulated optical-unit phase conductor

Investigation of Damage Mechanisms in Cfrp Composites with Fastener Under Coupled Arc Heat Flux and Current Effects

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