Dynamic modeling and simulation for transmission line galloping

Talib, Ezdiani; Shin, Ji-Hwan; Kwak, Moon Kyu; Koo, Jae R.

doi:10.1007/s12206-019-0812-1

Cited by 16 publications

(6 citation statements)

References 27 publications

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“…Li [5] established the finite element models with different ice thicknesses and wind speeds, then calculated corresponding aerodynamic characteristics. Talib [6] proposed a simplified dynamic model of transmission conductor galloping and verified the results through experiments. The above research based on quasisteady theory does not consider the influence of conductor movement on aerodynamic coefficients, so they are not real fluid-structure interaction.…”

Section: Introductionmentioning

confidence: 86%

Numerical analysis of fluid-structure interaction of iced line galloping

Zhou¹,

Zhang²,

Li³

et al. 2022

HSET

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Numerical simulation of transmission lines’ movement can reveal the variation of aerodynamic force with conductor vibration. The fluid-structure interaction is considered and, and the software FLUENT is used to numerically analyze the model responses of 0.75D crescent-shaped iced conductor with wind attack Angle of 180° based on the k-ω SST turbulence model. The numerical simulation results of unsteady galloping of the iced conductor are compared with the galloping response of displacement time history analysis. The results show that the results of the fluid-structure interaction analysis are consistent with the quasi-steady analysis.

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Section: Introductionmentioning

confidence: 86%

Numerical analysis of fluid-structure interaction of iced line galloping

Zhou¹,

Zhang²,

Li³

et al. 2022

HSET

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“…These equations express the voltage and current through a line of transmission with electricity based on the distance covered and the time spent. These equations had been followed since Oliver Heaviside developed the model of the line of transmission in the 1880s, and that is what is described in this paper [1]. The objective model is to demonstrate the waves related to electromagnetic that can have reflection through the wire.…”

Section: Historical Background Of Telegrapher's Equationsmentioning

confidence: 99%

An Efficient Computational Technique for the Analysis of Telegraph Equation

2022

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The Telegraph equation has drawn much attention due to its recent variety of applications in different areas of the communication system. Various methods have been developed to solve the Telegraph equation so far. In this research paper, we have formulated a derivation mathematically for the Telegraph equation for the section of a line of transmission concerning the voltage associated and the current. Therefore, obtained mathematical equation has been solved numerically by COMSOL Multiphysics. We have then numerically analyzed the parametric behavior of the Telegraph equation. The analysis first starts with allowing both the damping coefficients to vary, keeping the transmission velocity fixed, and observing the pulse shape at different time slots. We have then investigated the deformation of the pulse caused due to the gradual increase of transmission velocity for varying damping coefficients at the intended discrete time slots. Finally, we analyzed the behavior of the associated voltage pattern for those variations due to the corresponding distance of the Telegraph wire. We have observed that changes in the damping coefficients have a gradual impact on the associated voltage of the Telegraph equation, which is more conspicuous for the higher time slots. Transmission velocity is found as the most influential parameter of the Telegraph equation that controls the deformation of the pulse height, which is the cardinal part of the inquiry.

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“…Zhang et al (2000) used a hybrid model to analyze conductor galloping and provided validation by comparing the experimental and the simulated data. Talib et al (2019) added the linear term considering the vertical span ratio into the axial strain displacement relationship to analyze the conductor galloping and verified the reliability of the model through experiments. The finite element models are based on the classical theory of cable structures, ignoring the bending stiffness, and employ the axial-torsional coupling parameter (B T ) to treat the coupling between the axial and torsional stiffness.…”

Section: Introductionmentioning

confidence: 98%

Nonlinear dynamic analysis of galloping of a single iced conductor with four degrees of freedom based on curved beam theory

Yan

Zhang

et al. 2022

Advances in Structural Engineering

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Based on the nonlinear strain-displacement relationship of spatial curved beam theory, a finite element model for galloping analysis of iced transmission lines is established, which involves three translational degrees of freedom (DOF) and one rotational degree of freedom for each node. Considering the aerodynamic nonlinearity and the geometric nonlinearity of large amplitude motions of the iced transmission line, the nonlinear dynamic finite element equation is presented by using the virtual work principle. The equation is transformed into the sub-space according to the mode superposition method and a time integration algorithm is also performed in the sub-space. Then, the element independence and modal convergence are researched. Finally, the influence of aerodynamic forces on structural frequency is analyzed. The numerical results show that aerodynamic forces will greatly affect the torsional frequency of the transmission line, which accurately reflects the dynamic characteristics of transmission lines. Furthermore, the galloping calculation of the transmission line has reliable accuracy by using 4-DOF (per node) elements for the iced conductor. On the other hand, the model can predict the actual galloping response of the transmission line, which is convenient for the implementation of subsequent control design.

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Dynamic modeling and simulation for transmission line galloping

Cited by 16 publications

References 27 publications

Numerical analysis of fluid-structure interaction of iced line galloping

Numerical analysis of fluid-structure interaction of iced line galloping

An Efficient Computational Technique for the Analysis of Telegraph Equation

Nonlinear dynamic analysis of galloping of a single iced conductor with four degrees of freedom based on curved beam theory

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