Torsional stability of bundle conductors

Nigol, O.; Clarke, G. J.; Havard, D.G.

doi:10.1109/t-pas.1977.32496

Cited by 42 publications

(25 citation statements)

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“…A further improvement occurred in [9] where the spacer damper properties were determined more precisely in material tests. When modeling the present small-scale experiments and the torsional tests of [2], a simplification is applied, since rigid spacers were used in most of these experiments. In one case, a friction spacer was used, which is an in house design, and the data needed for developing its more sophisticated model were not reported in [2].…”

Section: Spacermentioning

confidence: 99%

“…When modeling the present small-scale experiments and the torsional tests of [2], a simplification is applied, since rigid spacers were used in most of these experiments. In one case, a friction spacer was used, which is an in house design, and the data needed for developing its more sophisticated model were not reported in [2]. This simplified model is summarized briefly as follows.…”

Section: Spacermentioning

confidence: 99%

“…Due to the lack of data on sudden ice shedding tests or field observations on full-scale conductor bundles, the numerical model was applied to simulate ice shedding tests on a full-scale line of single conductors as well as static torsional tests on a full-scale span of a twin bundle. These tests had already been carried out and the results are available in [1] and in [2], respectively.…”

Section: A Sudden Load Shedding On a Full-scale Line Of Single Condumentioning

confidence: 99%

“…When a subconductor in a multiconductor bundle sheds, the rotation of the bundle may also be significant, leading to bundle collapse in extreme cases. Bundle collapse occurs when the bundle rotation exceeds a critical angle so that the bundle loses its stability and does not untwist itself after load removal [2], [3]. A review of icerelated dynamic problems on overhead lines, including ice shedding and bundle rolling is provided in [4].…”

Section: Introductionmentioning

confidence: 99%

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Modeling Sudden Ice Shedding From Conductor Bundles

Kollár

Farzaneh

2013

IEEE Trans. Power Delivery

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Abstract-Sudden I. INTRODUCTIONHEDDING of the ice accreted on transmission line cables is a recurrent problem in cold regions. The falling of large ice chunks results in high-amplitude vibration of the de-iced cable giving rise to important dynamic forces acting on the transmission line. When a subconductor in a multiconductor bundle sheds, the rotation of the bundle may also be significant, leading to bundle collapse in extreme cases. Bundle collapse occurs when the bundle rotation exceeds a critical angle so that the bundle loses its stability and does not untwist itself after load removal [2], [3]. A review of icerelated dynamic problems on overhead lines, including ice shedding and bundle rolling is provided in [4].Research efforts to understand and simulate the dynamic effects of ice shedding have been carried on for several decades. Reference

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Section: Spacermentioning

confidence: 99%

Section: Spacermentioning

confidence: 99%

Section: A Sudden Load Shedding On a Full-scale Line Of Single Condumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling Sudden Ice Shedding From Conductor Bundles

Kollár

Farzaneh

2013

IEEE Trans. Power Delivery

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“…As early as 1932, Den Hartog [4] proposed the vertical galloping mechanism of ice-coated conductors. Nigol et al [5][6][7] proposed the torsional motion mechanism and the protective measures of galloping by the experimental study of the ice-coated conductors. Gurung et al [8] and van Dyke and Laneville [9] carried out a full-scale test to obtain the aerodynamic characteristics of the iced conductor.…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Tests on Aerodynamic Characteristics of Ice‐Coated 4‐Bundled Conductors

Nie

Zhu

et al. 2017

Mathematical Problems in Engineering

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Wind tunnel tests were carried out to obtain the static aerodynamic characteristics of crescent iced 4-bundled conductors with different ice thicknesses, initial ice accretion angles, bundle spaces, and wind attack angles. The test models were made of the actual conductors and have a real rough surface. Test results show that the influence of wake interference on the drag coefficients of leeward subconductors is obvious. The interference angle range is larger than 20 ∘ and the drag coefficient curves of leeward subconductors have a sudden decrease phenomenon at some certain wind attack angles. The absolute value of the lift and moment coefficient increases with the increase of the ice thickness. In addition, the galloping of the iced subconductor may occur at the angle of wind attack near ±20 ∘ and the wake increases the moment coefficient. The variation of initial ice accretion angle has a significant influence on the aerodynamic coefficients. The aerodynamic coefficient curves exhibit a "moving" phenomenon at different initial ice accretion angles. The bundle spaces have a great influence on the moment coefficient of leeward thin ice-coated conductors. With the increase of ice thickness, the bundle spaces generally have little influence on the aerodynamic coefficients.

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Design of Transmission Lines for Atmospheric Icing

Goel¹

2008

Atmospheric Icing of Power Networks

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Torsional stability of bundle conductors

Cited by 42 publications

References 0 publications

Modeling Sudden Ice Shedding From Conductor Bundles

Modeling Sudden Ice Shedding From Conductor Bundles

Wind Tunnel Tests on Aerodynamic Characteristics of Ice‐Coated 4‐Bundled Conductors

Design of Transmission Lines for Atmospheric Icing

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