Control scheme of the de‐icing method by the transferred current of bundled conductors and its key parameters

Jiang, Xingliang; Wang, Yaoxuan; Shu, Lichun; Zhang, Zhijin; Hu, Qin; Wang, Quanlin

doi:10.1049/iet-gtd.2015.0196

Cited by 9 publications

(8 citation statements)

References 16 publications

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“…Although the sun and wind can melt ice, thermal de-icing is the preferred solution in severe weather. Additionally, the duration of thermal deicing is between 0.5 and 3 hours [18]. Relative to the energy produced by thermal de-icing, ice melting by severe weather can be ignored.…”

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

“…An electric current flowing through the transmission conductor produces Joule heat. Part of the heat warms the ice layer, conductor, and air gap, and part of the heat (namely, the latent heat) melts the ice, and the remaining heat reaches the outer surface of the ice layer and is dissipated through convection and radiation [11,18]. This heat conductor process can be formulated as…”

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

“…Here, ice is the radius of the iced conductor, m; h is the heat-exchange coefficient [18], W/(m 2 ⋅K); oi is the outer surface temperature of the ice layer [18], ∘ C; air is the ambient temperature, ∘ C; ice is the density of ice, kg/m 3 ; f is the latent heat for melting ice ( f = 335,000 J/kg); m is the volume of melted ice per unit length, m 2 ; ice is the volume of the ice layer per unit length, m 2 ; ice is the specific heat of ice, J/(kg⋅ ∘ C); and ice is the temperature of the ice layer, which can be simplified as ( oi /2air ) [18], ∘ C. The entire equation can be expressed as…”

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

“…When the elliptical air gap is tangent to the outer surface of both the conductor and the ice layer, the ice hangs from the conductor [18], which is the detachment criterion of the initial ice shedding in the static state. Therefore, at the moment of detachment, the volume of the air gap per length [18] can be expressed as…”

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

“…A full-scale experiment of thermal de-icing was conducted in the Xuefeng Mountain Natural Icing Station established by Chongqing University [18]. There are two towers in the station.…”

Section: Experimental Configurationmentioning

confidence: 99%

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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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Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

Section: Characteristic Analysis Of Pis During Thermal De-icingmentioning

confidence: 99%

“…A full-scale experiment of thermal de-icing was conducted in the Xuefeng Mountain Natural Icing Station established by Chongqing University [18]. There are two towers in the station.…”

Section: Experimental Configurationmentioning

confidence: 99%

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