Results 1 to 10 of about 7,683 (287)
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 +4 more
doaj +2 more sources
Aerodynamic Instability Mechanisms of Iced Eight-Bundled Conductors: Frequency-Domain Analysis and Stability Assessment via Wind Tunnel–CFD Synergy [PDF]
SensorsIcing 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 +3 more
doaj +2 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
Buildings, 2022 The galloping condition of an iced eight-bundle conductor tower line system, under different parameters, is studied by using a finite element model of a multi-span iced eight-bundle conductor tower line system.
Bowen Tian +6 more
doaj +1 more source
Energies, 2022 Galloping is a typical wind-induced phenomenon in iced conductors, which can have serious impacts on the safe and stable operation of power systems. The aerodynamic characteristics of an iced conductor are the key factor in the study of galloping, which ...
Shaokai Liao +3 more
doaj +1 more source
Aerodynamic Characteristics Analysis of Iced Conductor Based on BP Neural Network
Buildings, 2022 Major disasters and losses would be caused by the galloping of transmission lines. The basis for studying the galloping mechanism of transmission lines is to analyze the aerodynamic characteristics of iced conductors.
Junhao Liang +6 more
doaj +1 more source
Modeling Sudden Ice Shedding From Conductor Bundles [PDF]
IEEE Transactions on Power Delivery, 2013 Sudden ice shedding from conductor bundles was modeled numerically and experimentally by improving the approaches proposed formerly for a single cable. The experimental study was carried out on a small-scale laboratory model of one span of a twin bundle.
Kollar, László E., Farzaneh, Masoud
openaire +1 more source
Establishment and Solution Strategy of Galloping Equation of Iced Conductors
Zhongguo dianli, 2021 The galloping of iced overhead conductors is one of the key factors for tripping fault of transmission lines, and threatens the security and stability of power system.
Hui LIU, Zengtai MA, Jikeng LIN
doaj +1 more source
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 +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 +2 more
doaj +1 more source