Conductor Galloping-Part II Torsional Mechanism

Nigol, O.; Buchan, P. G.

doi:10.1109/tpas.1981.316922

Cited by 154 publications

(82 citation statements)

References 2 publications

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“…Den Hartog put forward the theory of vertical line galloping [4]. Nigol presented the mechanism of torsional affect to describe line galloping [7,8]. The other galloping theories are all based on these two.…”

Section: Modeling Of Line Gallopingmentioning

confidence: 99%

“…The probability of line faults is related with the amplitude of line galloping, as expressed in Equation (8).…”

Section: The Mechanism Of Line Galloping Affecting Power Systems Opermentioning

confidence: 99%

“…The Den Hartog and O. Nigol mechanism of line galloping is presented in [7,8]. In [9] Hu revealed the characteristics of line galloping based on a statistical approach.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Simulating Long-Timescale Cascading Faults in Power Systems Caused by Line-Galloping Events

Chen

Zhang

et al. 2017

Energies

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Abstract:With the increasing occurrence of extreme weather events, the short circuit and line-breaking faults in transmission lines caused by line galloping have been threatening the security operation of power systems. These faults are also hard to be simulated with current simulation tools. A numerical simulation approach of power systems is presented to simulate the clustered, cascading faults of long-timescale caused by line-galloping events. A simulation framework is constructed in which large numbers of fault scenarios are simulated to reflect the randomness of line galloping. The interaction mechanism between power system operation states and line galloping processes is revealed and simulated by the solution of differences of timescales and parameters. Based on Power System Simulator/Engineering (PSS/E), an extended software package for line galloping simulation is developed with Python, which extends the functionalities of the PSS/E in power system simulation. An example is given to demonstrate the feasibility of the proposed simulation method.

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Section: Modeling Of Line Gallopingmentioning

confidence: 99%

“…The probability of line faults is related with the amplitude of line galloping, as expressed in Equation (8).…”

Section: The Mechanism Of Line Galloping Affecting Power Systems Opermentioning

confidence: 99%

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Modeling and Simulating Long-Timescale Cascading Faults in Power Systems Caused by Line-Galloping Events

Chen

Zhang

et al. 2017

Energies

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“…Den Hartog (1932) proposed that the galloping of conductor should be associated with ice shape. Aerodynamic characteristics of a single iced conductors have been investigated in wind tunnel by Nigol (1974) and Chabart, O et al (1998) as well. Besides using the wind tunnel test to measure the aerodynamic characteristics, Computational Fluid Dynamics (CFD) has become one of the important research methods (Linshu Zhou et al2015).…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Tests on Aerodynamic Characteristics of two types of Iced Conductors with Elastic Support

You

Wang

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The wind tunnel tests were carried out to obtain the variation laws of static aerodynamic characteristics of crescent and D-shape iced conductor with different wind velocities, wind attack angles and torsional elastic support stiffness. Test results show that the variation of wind velocity has a relatively large influence on the aerodynamic coefficients of crescent conductor with torsional elastic support 1.However, the influence on that of D-shape conductor is not obvious. With the increase of the torsional elastic support stiffness, the lift and moment coefficient curves of the crescent iced conductor form an obvious peak phenomenon in the range of 0 ° ~30°. Meanwhile, the wind attack angle position corresponding to the maximum value of the lift and moment coefficients of the D-shape iced conductor appear a backward moving phenomenon.

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“…Iced conductor galloping is one of typical structural selfexcitation vibration phenomenon, including strong nonlinearity, and galloping influence factors are complicated [4][5][6][7][8][9] . The concrete pertinent research works shall be developed according to the concrete line engineering conditions, meteorological and geographic conditions, and effective antigalloping measures shall be developed to ensure safe and stable operation of the line.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Liu¹,

Zhu²,

Liu³

et al. 2015

Proceedings of the 2015 International Conference on Sustainable Energy and Environmental Engineering

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Abstract-The anti-galloping method was proposed for the 6×1520 mm2 large cross section conductor. The galloping model was established by using nonlinear finite element method and considering geometric nonlinear, aerodynamic nonlinear and initial deformation. The galloping characteristics and the critical conditions to excite galloping were obtained for the large cross section conductor. And the anti-galloping effect was also evaluated by using the rotary clamp spacers. The results show that the multi-bundled conductors are more vulnerable to the galloping phenomenon than the single conductors under the same ice and wind conditions. And the galloping characteristics obtained by 1520 mm2 large cross section conductor are basically the same with other cross section conductors. The anti-galloping effect can meet the requirement by using rotary clamp spacer for the 6×1520 mm2 large cross section conductor in the easy galloping areas. And even in the harshest ice and wind conditions, the galloping amplitude can be reduced in the largest extent and the time to excite galloping can be greatly extended.

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Conductor Galloping-Part II Torsional Mechanism

Cited by 154 publications

References 2 publications

Modeling and Simulating Long-Timescale Cascading Faults in Power Systems Caused by Line-Galloping Events

Modeling and Simulating Long-Timescale Cascading Faults in Power Systems Caused by Line-Galloping Events

Wind Tunnel Tests on Aerodynamic Characteristics of two types of Iced Conductors with Elastic Support

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