Monitoring of Overhead Transmission Conductors Subjected to Static and Impact Loads Using Fiber Bragg Grating Sensors

Waters, Daniel H.; Hoffman, Joseph; Kumosa, M.

doi:10.1109/tim.2018.2851698

Cited by 34 publications

(6 citation statements)

References 24 publications

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“…The wind-speed acquisition device was installed at the iron tower near the mid-phase jumper, and the wind-speed data were collected. In addition, a terminal for receiving the data was also set up in the laboratory [17,18].…”

Section: Jumper-swing Monitoring Systemmentioning

confidence: 99%

Research on Failure Mechanisms of Broken Strands of Jumper Wires for EHV Transmission Lines in Strong-Wind Areas

Han

Yongjie

et al. 2019

Metals

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The jumper wires of an extra-high voltage (EHV) transmission line in strong-wind areas in Northwest China frequently break down. We installed some acquisition devices to collect the data of the jumper wires and wind speed in the fault area of one 750-kV transmission line. We also developed a swing simulation machine based on the collected data. The machine could simulate the swing condition of the jumper wires under various wind speeds. We analyzed the broken aluminum wires obtained from the simulation experiment of jumper wires. Yield lines appeared on the surface of the broken aluminum wires in the simulation experiment. Proliferation of dislocation and grain deformation occurred in the broken aluminum wires using transmission electron microscopy observation. The results show that the aluminum wires in the experiment under a Level-6 wind and above were in a full yield state and demonstrated strain-fatigue failure condition. The fracture of the broken aluminum wires showed distinct strain-fatigue fracture characteristics using the scanning electron microscope fracture morphology analysis. From the combination of the abovementioned research, we conclude that the failure mechanism of the broken strands of the jumper wires of the EHV transmission line in the strong-wind area is mainly a strain-fatigue failure mechanism.

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Section: Jumper-swing Monitoring Systemmentioning

confidence: 99%

Research on Failure Mechanisms of Broken Strands of Jumper Wires for EHV Transmission Lines in Strong-Wind Areas

Han

Yongjie

et al. 2019

Metals

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“…However, strain gauges have a short lifespan and are susceptible to electromagnetic interference, leading to a significant decrease in measurement performance when operating for extended periods in harsh environments [9]. Fiber optic sensors have advantages such as immunity to electromagnetic interference, no need for power supply, and long-term stability [10]. Some scholars have decoupled conductor temperature and tension using chirped fiber Bragg grating to monitor tension changes in conductors in real-time [11].…”

Section: Introductionmentioning

confidence: 99%

Research on online monitoring method for time-varying tension in transmission lines based on operational modal response

Liu,

Zhao,

Wen

et al. 2024

Meas. Sci. Technol.

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The cumulative overload of conductor tension under severe weather conditions is an important cause of accelerated fatigue fracture of transmission lines. Traditional tension measurement methods require the replacement of ball head hanging rings, which poses safety risks. In this paper, a method for monitoring conductor tension based on acceleration data under operating conditions is proposed. Firstly, a modal order extraction based method for identifying the modal frequencies of conductor operation is proposed, and then the time-varying tension of the conductor is estimated based on the instantaneous modal frequencies. Since this method directly installs sensors on the conductor, there is a certain error in the obtained intrinsic characteristic data of the conductor. Therefore, a modal correction method is used to remove the influence of the sensors. The accuracy of modal identification, modal correction, and tension identification methods is verified through finite element models. Based on the above methods, a monitoring system for conductor tension status is designed, and the feasibility of this system is verified through experiments. Finally, the vibration data obtained from the field engineering pilot test is successfully used for conductor tension analysis. The results show that the proposed method can effectively identify time-varying tension and provide a new approach for monitoring the status of transmission line conductors.

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“…A fiber Bragg grating (FBG) is a passive optical fiber device with narrow band reflection characteristics fabricated on an optical fiber. Because of its small size, large measurement range, good wavelength selectivity, insensitive polarization, and strong anti-interference ability, FBGs are widely used in many fields such as infrastructure, national defense and security, biomedicine, and petrochemicals [1][2][3][4]. The numbers of sensors required in such applications have also been increased significantly to ensure that the accuracy of sensor data monitoring does not decrease.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing and Shortest Path in Optical Fiber Sensor Network

Mao

et al. 2022

Journal of Sensors

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In this study, a new square-based fiber Bragg grating (FBG) sensor network model is proposed to address possible link failures in FBG sensor networks and improve their reliability. Graph theory and optical switching are simultaneously applied to these sensor networks to improve their self-healing ability; the FBG sensor network is regarded as a directed graph. Three commonly used self-short-circuit algorithms are compared in terms of the self-healing capabilities that they provide to the optical fiber sensor network. Among these, the shortest-path faster algorithm achieved a high, nearly 90% repair accuracy and had an average repair time of 0.103 s, the shortest in this study. The newly designed FBG self-healing network can be reorganized and repaired when local damage occurs, thereby improving its reliability.

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Monitoring of Overhead Transmission Conductors Subjected to Static and Impact Loads Using Fiber Bragg Grating Sensors

Cited by 34 publications

References 24 publications

Research on Failure Mechanisms of Broken Strands of Jumper Wires for EHV Transmission Lines in Strong-Wind Areas

Research on Failure Mechanisms of Broken Strands of Jumper Wires for EHV Transmission Lines in Strong-Wind Areas

Research on online monitoring method for time-varying tension in transmission lines based on operational modal response

Self-Healing and Shortest Path in Optical Fiber Sensor Network

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