Results 1 to 10 of about 3,512 (202)

Design of a Wireless Sensor Module for Monitoring Conductor Galloping of Transmission Lines [PDF]

Sensors, 2016
Conductor galloping may cause flashovers and even tower collapses. The available conductor galloping monitoring methods often employ acceleration sensors to measure the conductor translations without considering the conductor twist.
Xinbo Huang, Long Zhao, Guimin Chen
doaj   +2 more sources

Deep Learning-Based Instance Segmentation of Galloping High-Speed Railway Overhead Contact System Conductors in Video Images [PDF]

Sensors
The conductors of high-speed railway OCSs (Overhead Contact Systems) are susceptible to conductor galloping due to the impact of natural elements such as strong winds, rain, and snow, resulting in conductor fatigue damage and significantly compromising ...
Xiaotong Yao, Huayu Yuan, Shanpeng Zhao, Wei Tian, Dongzhao Han, Xiaoping Li, Feng Wang, Sihua Wang   +7 more
doaj   +2 more sources

Research on Video Monitoring Technology for Galloping of OCS Additional Conductors of High-Speed Railway in Strong Wind Zone [PDF]

Sensors
The strong wind environment causes the additional conductor of the overhead contact system (OCS) of the Lanzhou–Xinjiang high-speed railway to gallop, significantly impacting the safe operation of the train.
Wentao Zhang, Wenhao Wang, Shanpeng Zhao, Huayu Yuan, Youpeng Zhang, Xiaotong Yao, Guangwu Chen   +6 more
doaj   +2 more sources

Prediction model for aerodynamic coefficients of iced quad bundle conductors based on machine learning method [PDF]

Royal Society Open Science, 2021
The lift, drag and torsional moment coefficients, versus wind attack angle of iced quad bundle conductors in the cases of different conductor structure, ice and wind parameters are numerically simulated and investigated. With the Latin hypercube sampling
Zheyue Mou, Bo Yan, Hanxu Yang, Daoda Cai, Guizao Huang   +4 more
doaj   +2 more sources

A Fiber Bragg Grating-Based Dynamic Tension Detection System for Overhead Transmission Line Galloping [PDF]

Sensors, 2018
Galloping of overhead transmission lines (OHTLs) may induce conductor breakage and tower collapse, and there is no effective method for long distance distribution on-line galloping monitoring.
Guo-ming Ma, Ya-bo Li, Nai-qiang Mao, Cheng Shi, Bo Zhang, Cheng-rong Li   +5 more
doaj   +2 more sources

Analysis of galloping response in ice-coated transmission conductors under wind loads. [PDF]

PLoS ONE
Conductor galloping is a low-frequency, large-amplitude vibration phenomenon induced by the combined action of ice accretion and wind loads, which poses severe threats to power grid safety. For 500 kV transmission lines in Xinjiang, a strain-displacement
Shuang Wu, Haiqing Liu, Yunlong Wang, Yuxin Wang   +3 more
doaj   +2 more sources

Equation of motion of split conductor of anchor section at icing in wind flow [PDF]

International Journal of Renewable Energy Development
The relevance of the examined problem is connected with the necessity to develop measures to combat conductor galloping and the design of power transmission lines (ETL).
Rakhimash Abitayeva, Amangeldy Bekbayev, Muratkali Dzhamanbayev, Kairat Bayanbayev, Dina Aikimbayeva   +4 more
doaj   +3 more sources

Spatial Galloping Behavior of Iced Conductors under Multimodal Coupling. [PDF]

Sensors (Basel)
In this study, the coupled ordinary differential equations for the galloping of the first two modes in iced bundled conductors, including in-plane, out-of-plane, and torsional directions, are derived. Furthermore, through numerical analysis, the critical conditions of this modal galloping are determined in the range of wind speed–sag parameters, and ...
Cui F, Zheng K, Liu P, Wang H.
europepmc   +4 more sources

Aerodynamic Instability Mechanisms of Iced Eight-Bundled Conductors: Frequency-Domain Analysis and Stability Assessment via Wind Tunnel–CFD Synergy [PDF]

Sensors
Icing on transmission lines in cold regions can cause asymmetry in the conductor cross-section. This asymmetry can lead to low-frequency, large-amplitude oscillations, posing a serious threat to the stability and safety of power transmission systems.
Bolin Zhong, Minghao Qiao, Mengqi Cai, Maoming Hu   +3 more
doaj   +2 more sources

Hysteresis Phenomenon in the Galloping of the D-Shape Iced Conductor [PDF]

Mathematical Problems in Engineering, 2013
It is well known that there is a hysteresis phenomenon in the amplitude variation in the iced conductor galloping with the wind velocity, which will have more obvious disadvantages to the overhead transmission lines. But hysteresis characteristics in the conductor galloping have not received much attention.
Liu, Bin, Zhu, KuanJun, Li, XinMin, Zhan, XuePing   +3 more
openaire   +5 more sources