Results 11 to 20 of about 2,850 (288)

Investigation on the Nonlinear Vibration Characteristics of Current-Carrying Crescent Iced Conductors under Aerodynamic Forces, Ampere’s Forces, and Forced Excitation Conditions

Discrete Dynamics in Nature and Society, 2021
Aiming at the problem of nonlinear vibration of current-carrying iced conductors, the aerodynamic forces are introduced into the previous vibration equation of current-carrying conductors that only considered Ampere’s forces.
Xiaohui Liu, Haobo Liang, Guangyun Min, Chuan Wu, Mengqi Cai   +4 more
doaj   +1 more source

Investigation Into the Galloping Characteristics of Multispan Iced Covered Conductors

IEEE Access, 2022
A full multispan two-degree-of-freedom (2-DOF) iced covered transmission line model is presented. Taking multispan conductors as the research object, based on the Hamiltonian principle, a nonlinear galloping model of multispan conductors considering the ...
Jia-Yan Zheng, Qi-Hang Shen, Xiao-Hui Liu   +2 more
doaj   +1 more source

Numerical Simulation of Galloping Characteristics of Multi-Span Iced Eight-Bundle Conductors

Frontiers in Energy Research, 2022
In this article, the numerical model of the multi-span iced eight-bundle conductor is established using the nonlinear finite element method, the galloping of the line under different parameters is simulated, and the tension in the galloping process is ...
Ding Shunli, Cai Mengqi, Cai Mengqi, Tian Bowen, Liang Junhao, Zhou Linshu, Wu Chuan, Huang Hanjie, Liu Jun   +8 more
doaj   +1 more source

Study on Galloping Oscillation of Iced Twin Bundle Conductors considering the Effects of Variation of Aerodynamic and Electromagnetic Forces

Shock and Vibration, 2020
Due to the occurrence of whole-span and subspan vibration at the same time during the galloping of the iced bundle conductors, the distance between the subconductors changes, resulting in the variation of the aerodynamic parameters for the leeward ...
Chuan Wu, Zhongfei Ye, Bo Zhang, Yong Pan, Qing Li, Bo Yan   +5 more
doaj   +1 more source

Dynamic Response Analysis of Asynchronous Deicing of Quad Bundle Conductor Spacer System During DC Ice Melting

IEEE Access, 2022
In order to study the melting and falling off of the iced conductor under DC ice melting process by considering a lgj-400 / 50 transmission conductor as a research object, Ansys LS-DYNA model is used for simulating the response of materials under short ...
Zhu He, Tang Wenpeng, Zhang Renqi, Wang Weiqi, Liao Hanliang   +4 more
doaj   +1 more source

Vibration of Bundled Conductors Following Ice Shedding [PDF]

IEEE Transactions on Power Delivery, 2008
The dynamic behavior of bundled conductors following ice shedding from one subconductor is examined numerically using the finite-element method. An existing model of ice shedding from a single conductor is improved by developing a model of spacers which connect subconductors in the span.
Kollar, László E., Farzaneh, Masoud
openaire   +1 more source

Numerical Analysis on the Sub-Span Oscillation of Iced Eight-Bundle Conductors During Galloping

Frontiers in Energy Research, 2022
Under the excitement of wind loads, UHV transmission lines are subject to two types of vibration phenomena, namely, sub-span oscillation and galloping.
Liu Yu, Cai Mengqi, Cai Mengqi, Wang Qingyuan, Wang Qingyuan, Wang Qingyuan, Zhou Linshu, Xu Qian, Ding Shunli, Liu Jun, Huang Chunlin   +10 more
doaj   +1 more source

Numerical Simulation of the Dynamic Responses of Electric Power Fitting of Transmission Lines after Ice Shedding

Shock and Vibration, 2022
As the key connecting components between tower and conductors, electric power fittings play an important role in the provision of the safe operation of transmission lines.
Zhongfei Ye, Chuan Wu, Xiaohui Liu, Fei Huang   +3 more
doaj   +1 more source

Wind Tunnel Test Investigation on Unsteady Aerodynamic Coefficients of Iced 4-Bundle Conductors

Advances in Civil Engineering, 2019
Iced conductor motion is induced by the aerodynamic instability of these conductors. The unsteady aerodynamic characteristics are different from the steady aerodynamic characteristics.
Mengqi Cai, Linshu Zhou, Hang Lei, Hanjie Huang   +3 more
doaj   +1 more source

Study on the Dynamic Characteristics of Tensional Force for Ice Accumulated Overhead Lines Considering Instantaneous Wind Speed

Energies, 2023
Icing is one of the key factors affecting the security and reliability of power system operation. Ice accumulation on the overhead line (OHL) conductors is often accompanied by strong winds, whose magnitude and direction are varied constantly, which ...
Meng Li, Jianlin Hu, Yang Yang, Mingguan Zhao, Xiaofeng Wang, Xingliang Jiang   +5 more
doaj   +1 more source