An Ultrasmall Bolt Defect Detection Method for Transmission Line Inspection

Luo, Peng; Wang, Bo; Wang, Hongxia; Ma, Fuqi; Ma, Hengrui; Wang, Leixiong

doi:10.1109/tim.2023.3241994

Cited by 31 publications

(18 citation statements)

References 38 publications

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“…The formula for calculating the shape of the suspension chain line of the overhead cable is shown in Equation (3).…”

Section: Transmission Line Suspension Chain Line Shape Analysismentioning

confidence: 99%

“…Bolts and pins are commonly used as fasteners in fixtures to connect the components and maintain stability of the whole structure. However, broken or lost bolts and pins can cause critical issues, such as large transmission line failures [3]. Thus, regular inspections of transmission lines are necessary to check and repair line equipment in a timely manner, particularly for missing pins, which are critical defects, to ensure safe and stable operation of the power grid [4].…”

Section: Introductionmentioning

confidence: 99%

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Structural design and simulation study of intelligent defect elimination equipment for high‐voltage transmission line pin defects

Pei,

Sun

2023

IET Generation Trans & Dist

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Transmission lines may suffer from pin defects, necessitating regular patrols and maintenance. The traditional maintenance approach not only involves a substantial workload and low efficiency but also poses a threat to the safety of maintenance personnel. To address the issue of pin defects in high‐voltage transmission lines, this paper introduces the design of an intelligent pin‐eliminating robot. The research focuses on two main aspects: firstly, analyzing the transmission line environment and employing Solidworks software to design the mechanical structure of the robot. Subsequently, a static stress analysis of the robot's structure is conducted to ensure the rationality of the design. The second aspect addresses the impact of the robot on the electric field distribution of the transmission line in high electric field intensity areas and whether the robot itself experiences discharge phenomena. COMSOL simulation software is utilized to globally calculate and analyze the electric field of the robot. Research results indicate that the threshold for the curvature radius of the pin‐eliminating robot's tip is 2.5mm, and values below this threshold may lead to the occurrence of discharge phenomena. The optimized pin‐eliminating robot, under normal operation, does not exhibit discharge phenomena in a 500kV strong electric field.

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“…The formula for calculating the shape of the suspension chain line of the overhead cable is shown in Equation (3).…”

Section: Transmission Line Suspension Chain Line Shape Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural design and simulation study of intelligent defect elimination equipment for high‐voltage transmission line pin defects

Pei,

Sun

2023

IET Generation Trans & Dist

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show abstract

“…Optimization formulation is as non-linear, linear, mixed integer non-linear or mixed integer linear models [87][88][89][90][91]. In order to implement the optimization model on a network, it is necessary to have intelligent devices [92][93][94][95][96]. Smart systems are based on telecommunications equipment [97][98][99][100][101].…”

Section: Formulation Of the Ibvpp Operationmentioning

confidence: 99%

Energy management of distribution network with inverter‐based renewable virtual power plant considering voltage security index

Azarhooshang,

Rezazadeh

2023

IET Renewable Power Gen

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Virtual power plants (VPP) with resources and storages are able to control the active power of the network. They are also connected to the network through an inverter, which is capable of controlling reactive power. Therefore, it is expected that the optimal use of inverter‐based VPP can play an effective role in improving the economic and technical status of the distribution network. So, the operation of a smart distribution system is presented in this paper by considering inverter‐based VPPs constrained to the operator's measures. The weighted sum of expected energy loss (EEL) and voltage security index (VSI) is minimized while considering AC optimal power flow equations, restrictions of network's security, and operating model of the inverter‐based VPPs. Uncertainties with an origin of the amount of demand, renewable energy, and parameters of mobile energy storage are also discussed. The uncertainties are modelled using a stochastic optimization approach relying on the unscented transformation (UT). Evaluating inverter‐based VPP performance, providing models of flexible resources such as responsive loads and mobile storages, checking network voltage security status, and modelling uncertainties using the UT method are among the innovations of this study. According to the results, it is demonstrated that the technical situation of the distribution system is improved with the help of optimal management of the VPP. With energy management of the inverter‐based VPP, the suggested design has succeeded to enhance the operating status (voltage security) of the system by approximately 33–73% (12%) in comparison to power flow studies.

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“…Unmanned aerial vehicles, commonly referred to as drones, provide an efficient solution to inspecting hard-to-reach structures such as bridges and wind turbines. [1][2][3][4] In addition, when combined with sensing technologies and techniques such as ultrasonics, [5][6][7][8] LiDAR, [9][10][11] and image recognition, [12][13][14][15][16][17][18][19][20][21][22] they can increase the accuracy and effectiveness of infrastructure assessments.…”

mentioning

confidence: 99%

“…Recently, inspection methods have incorporated drones and image recognition technologies. [17][18][19][20][21][22] Although these advances are effective in identifying missing parts and obvious signs of bolt loosening or corrosion, it remains difficult to identify bolts with reduced axial force. This is primarily because subtle changes in axial force often do not manifest as notable visual changes that can be captured by cameras.…”

mentioning

confidence: 99%

Displacement amplification mechanism in passive capacitive bolt axial force sensors to suppress manufacturing variations

Hasebe,

Nakamura

2024

Jpn. J. Appl. Phys.

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We present a method of minimizing manufacturing variations in passive capacitive sensors for noncontact bolt inspection using a displacement amplification mechanism. This inspection mechanism uses electromagnetic coupling to eliminate the need for contact, making it particularly suitable for inspections using unmanned aerial vehicles. Analysis by the finite element method and prototype testing verified the capability of the mechanism to amplify displacement changes due to axial force. The prototype exhibited an 80% increase in displacement relative to the bolt head, effectively halving variation effects. Despite the design challenges, the mechanism significantly improved the effectiveness of the sensor.

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An Ultrasmall Bolt Defect Detection Method for Transmission Line Inspection

Cited by 31 publications

References 38 publications

Structural design and simulation study of intelligent defect elimination equipment for high‐voltage transmission line pin defects

Structural design and simulation study of intelligent defect elimination equipment for high‐voltage transmission line pin defects

Energy management of distribution network with inverter‐based renewable virtual power plant considering voltage security index

Displacement amplification mechanism in passive capacitive bolt axial force sensors to suppress manufacturing variations

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