Vibration of Bundled Conductors Following Ice Shedding

Kollár, László; Farzaneh, M.

doi:10.1109/tpwrd.2007.915876

Cited by 70 publications

(35 citation statements)

References 9 publications

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“…in [3] the simulation of the dynamic responses of transmission lines with different parameters after ice-shedding by means of FEM. In [4,5] the dynamic behavior of bundle conductors and five-span line section after ice-shedding is numerically simulated. In [1], a new theoretical method to calculate the jump height of the overhead power line after ice-shedding is presented.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Ice-Shedding from ACSR Power Line

Hrabovský

Gogola

Muŕın

et al. 2017

Strojnícky Casopis – Journal of Mechanical Engineering

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Abstract:In this contribution, the analysis of ice-shedding from Aluminium Conductor Steel Reinforced (ACSR) power lines is presented. The impact of the icing position on the overhead power lines, the resulting jump height, and impact on attachment tension points after ice-shedding is examined. In the numerical simulations the effective material properties of the ACSR conductor is calculated using the homogenisation method. Numerical analysis of one power line and double-bundle power lines with icing over the whole range or only on certain sections of single and double-bundle power lines are performed. KEYWORDS:ACSR power line, ice-shedding, finite element method, transient analysis IntroductionIn cold regions, atmospheric icing is one of the major external loads threatening the reliability and mechanical integrity of overhead power lines. Ice-shedding form an iced overhead power line (eq. temperature rise) cause a vertical jump of the power lines and may lead to flashover if the phase-to-phase or phase-to-tower distance is smaller than the tolerable insulation distance. Therefore, it is necessary to determine the maximum jump height of an overhead power line after ice-shedding and to provide a reference for the design of the overhead power lines [1]. Ice-shedding can also cause dangerous vibrations in power lines, which can result in mechanical damage of the power line and power line pylons. Therefore, the transient analysis of ice-shedding is necessary.Ice-shedding has been investigated with experimental, numerical and theoretical methods by many authors. Very approximate practical models have been suggested as early as the 1940s [2]. With the improvement of computational mechanics, numerical simulation methods (over all the finite element method -FEM) were used to study ice-shedding from the power lines eq. in [3] the simulation of the dynamic responses of transmission lines with different parameters after ice-shedding by means of FEM. In [4,5] the dynamic behavior of bundle conductors and five-span line section after ice-shedding is numerically simulated. In [1], a new theoretical method to calculate the jump height of the overhead power line after ice-shedding is presented.In this paper, the results of the transient analyses of ice-shedding from the ACSR power lines are presented. The results are calculated using a commercial finite element software ANSYS. 2 Modelling of ACSR power lineAluminium Conductor Steel Reinforced (ACSR) cable are multi-wire conductors commonly used in overhead power lines. The outer strands of ACSR are made of aluminium due to its excellent conductivity, low weight and low cost. The center strands are made of steel for the strength required to support the weight without stretching the aluminium due to its ductility.

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Section: Introductionmentioning

confidence: 99%

Modeling of Ice-Shedding from ACSR Power Line

Hrabovský

Gogola

Muŕın

et al. 2017

Strojnícky Casopis – Journal of Mechanical Engineering

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“…Very approximate practical models were suggested as early as the 1940s [4]. With the improvement of computational mechanics, numerical simulation methods (over all the FEM) were used to study ice-shedding from the power lines eg in [5][6][7] dynamic responses of transmission lines with different parameters, bundle conductors and five-span line section after ice-shedding is numerically simulated. In [8], a new theoretical method to calculate the jump height of the overhead power line after ice-shedding is presented.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Overhead Power Lines after Ice–Shedding Using Finite Element Method

Muŕın

Hrabovský

Gogola

et al. 2016

Journal of Electrical Engineering

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In this paper, the analysis of ice-shedding from ACSR conductors to its swing up height and vibration using Finite Element Method (FEM) is presented. For the numerical simulations the effective material properties of the ACSR conductor are calculated using the homogenisation method. Numerical analysis concerning vibration of one and triple-bundle conductors with icing for a whole range or on their certain parts are performed. The impact of ice-shedding to the mechanical tension in the conductors at the points of attachment is investigated and evaluated. Identification of the impact of ice-shedding from the ACSR conductors on its mechanical state may contribute to increasing the safety and quality of an electrical transmission system.

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“…In particular, a numerical model developed formerly to simulate ice shedding is applied for a twin bundle of conductors with various line parameters. Ice shedding was simulated numerically on a single conductor in [5] and [10], and on conductor bundles in [6] and [7]. The numerical model of [5] was validated by small-scale experiments; whereas fullscale experiments were carried out in [8] to simulate sudden ice shedding, and in [11] to simulate propagating ice shedding.…”

Section: Introductionmentioning

confidence: 99%

“…The dependence of conductor jump height on length of ice-shedding span and elevation difference was computed in [12]. The vertical vibration of bundled conductors was simulated in [6] for different subspan lengths. Bundle rotation was also considered in [7], but the effects of different line parameters on both of vibration and rotation of the conductor bundle have not been investigated in the literature.…”

Section: Introductionmentioning

confidence: 99%