Dynamic characteristic of ice-shedding on UHV overhead transmission lines

Meng, Xiaobo; Wang, Liming; Hou, Lingyun; Fu, Guanjun; Sun, Bohua; MacAlpine, Mark; Hu, Wei; Chen, Yong

doi:10.1016/j.coldregions.2011.01.005

Cited by 43 publications

(26 citation statements)

References 11 publications

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“…4) and has been verified its engineering accuracy in many pieces of published articles [3][4]. In brief, the conductor-insulator system is discretized and for every discrete point only consecutive points can provide acting force.…”

Section: Modelling Of Simulationmentioning

confidence: 99%

Feasibility analysis of polymeric material insulator applied to phase to earth insulation of transmission line

Gao

Mei

Wang

et al. 2014

2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Transmission lines exposed to the atmosphere in long terms may get easily affected by wind, icing and other factors which may lead to jumping and galloping, reduce the inter-phase clearance and cause flashover as a result. To avoid these, this paper applies polymeric material insulator to the line-to-earth, which means some spot through the span is linked to a ground anchor by the specialized polymeric material considering its better performance of anti-pollution flash-over, higher mechanical strength, lighter weight and less maintenance compared with traditional material. In order to investigate the effects of the line-to-earth applying the polymeric material insulator, the conductor-insulator-ground system has been simulated in this paper to calculate the sag, the inter-phase clearance and the dynamic amplitude. Different suspension points and material properties including diameter and mass have been analyzed and compared to provide proposal for line application. Furthermore, the simulation results have been compared with not only some other measures but also the results of the field test. The simulation results show that the dynamic amplitude gets smaller and the phase-to-phase clearance is enough when the polymeric material insulator is installed and the comparisons verify the accuracy of the simulation method, the feasibility and effectiveness of this measure. So it is a useful solution to reduce jumping and galloping by using specific polymeric material insulator.

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Section: Modelling Of Simulationmentioning

confidence: 99%

Feasibility analysis of polymeric material insulator applied to phase to earth insulation of transmission line

Gao

Mei

Wang

et al. 2014

2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

Self Cite

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“…Kollár et al conducted the wet-snow-shedding experiment of a single overhead line in the freezing laboratory to simulate the shedding process of wet snow under various natural conditions (see [25]). Meng et al made a simulation study of ice shedding in isolated span and continuous span and measured the jump height of the conductor (see [26]). Yang et al used a single conductor to simulate the ice-shedding phenomenon between isolated span and found that the max dynamic tension caused by part of ice shedding from the conductor may be larger than the whole ice shedding (see [27]).…”

Section: Introductionmentioning

confidence: 99%

Experiment Study on Dynamic Effects of Tower‐Line Systems Induced by Ice Shedding

Xie

Liang

et al. 2020

Advances in Civil Engineering

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Taking the 220 kV transmission line as the prototype, a test model of the double-span tower-line system with a scale ratio of 1 : 20 was proposed on the basis of dynamic similarity theory. 14 different working conditions including zippered, simultaneous, entire, and local ice-shedding were controlled and realized by use of the program-controlled mode. The displacement transient responses of transmission line under these ice-shedding conditions were analyzed in detail. The results show that the variation laws of the ice-shedding dynamic-load coefficient and the jump height with the velocity, quantity, and position of the ice-shedding are obtained, which can provide references for the design of the transmission tower-line system.

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“…Current research on the dynamic response of ice shedding from transmission lines generally focuses on ice shedding scenarios with a fixed amount of ice shedding. Various ice shedding scenarios have been analyzed, including ice shedding from a single-span transmission line [2,3], a continuous-span line [4], an overhead ground wire [5], a tower-line system [6], a transmission line with bundled conductors and spacers [3,7], and a high-voltage overhead transmission line [8,9]. This research assumes that, after the initial ice shedding, the remaining ice does not detach from the vibrating conductor.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Progressive Ice Shedding along a Transmission Line during Thermal De‐Icing

Xie

Huang

Wang

et al. 2019

Mathematical Problems in Engineering

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Progressive ice shedding (PIS) along transmission lines is a common type of ice shedding during thermal de-icing that requires investigation to ensure the security of transmission lines. In current research, PIS is commonly analyzed using a constant speed for ice detaching from the conductor, which is not accurate for PIS simulation. Therefore, a mechanical model of PIS is established in this study to analyze PIS during thermal de-icing. First, an ice detachment model during thermal de-icing is built to determine the detachment times of the initial ice and remaining ice. Then, a two-node isoparametric truss element is employed to derive the static and dynamic equilibrium equations of an iced conductor to simulate the dynamic response of PIS. Relative to commercial software, these equations can easily accommodate the changing mass of ice with the flow of melted water. The dynamic equilibrium equations are then solved using the ice detachment model to obtain the dynamic response of PIS. Finally, small-scale and full-scale experimental results are employed to verify the proposed method. The simulation results show that the results of the proposed method are more consistent with the experimental results than are the results of existing methods that assume a constant propagation speed. The proposed method can be further applied to optimize transmission line designs and evaluate the application of thermal de-icing devices.

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Dynamic characteristic of ice-shedding on UHV overhead transmission lines

Cited by 43 publications

References 11 publications

Feasibility analysis of polymeric material insulator applied to phase to earth insulation of transmission line

Feasibility analysis of polymeric material insulator applied to phase to earth insulation of transmission line

Experiment Study on Dynamic Effects of Tower‐Line Systems Induced by Ice Shedding

Modeling and Analysis of Progressive Ice Shedding along a Transmission Line during Thermal De‐Icing

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