DC flashover performance of ice‐covered insulators under complex ambient conditions

Hu, Yuyao; Jiang, Xingliang; Shu, Lichun; Zhang, Zhijin; Hu, Qin; Hu, Jianlin

doi:10.1049/iet-gtd.2015.1463

Cited by 22 publications

(15 citation statements)

References 23 publications

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“…Energies 2018, 11, 2678 5 of 13 (5) According to the Equation (1), calculate the standard ice thickness d of the cylindrical ice-covered conductor with a density of 0.9 g/cm 3 .…”

Section: Test Methodsmentioning

confidence: 99%

“…[1]. Extra/Ultra-high voltage (EHV/UHV) transmission lines inevitably pass through high altitude and a typical micro-meteorological icing area, which may result in huge economic loss due to a series of electrical and mechanical faults of icing flashover [5][6][7][8], conductor galloping [9][10][11], asynchronism of ice shedding [12][13][14], and even broken line [15][16][17]. At present, the methods of anti-icing and de-icing, such as super-hydrophobic coatings, short circuit method to melt ice [18], and mechanical de-icing, are costly, inefficient, and difficult to maintain.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Icing Accretion Performance of Conductors and Its Normalized Characterization Method of Icing Degree for Various Ice Types in Natural Environments

Fan

Jiang

2018

Energies

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Icing degree in the severe icing regions for years is an important factor considered in the anti-icing design of transmission lines. However, there is currently no normalized characterization method for the icing degree of transmission lines, which can be used to record the severity of icing at icing areas over the years and guide the design of transmission lines. This study analyzes collision efficiency of water droplets with various diameters of conductors and investigates the ice accretion law of transmission lines with various diameters under four natural ice types. Therefore, the normalized method of standard ice thickness instead of various ice morphologies is creatively used to characterize icing degree of transmission lines and a lot of field tests which have been done at six natural ice observation stations have verified the effective of the method. The results have shown that: The diameters of conductor and the droplet significantly affect collision efficiency; the relation of standard ice thickness with diameter of conductors for four typical ice types complied with the law of power function. The results can provide important references for the design and external insulation selection of transmission lines in ice region.

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“…Energies 2018, 11, 2678 5 of 13 (5) According to the Equation (1), calculate the standard ice thickness d of the cylindrical ice-covered conductor with a density of 0.9 g/cm 3 .…”

Section: Test Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Icing Accretion Performance of Conductors and Its Normalized Characterization Method of Icing Degree for Various Ice Types in Natural Environments

Fan

Jiang

2018

Energies

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“…However, the ice-coating process is not only influenced by environmental conditions such as weather, season and terrain, the surface material properties of insulators also have effects to some extent [14][15][16]. Since the advent of the insulator, the surface material and configuration of which were updated continuously.…”

Section: Introductionmentioning

confidence: 99%

Influence of electric field on the ice‐coating process of insulators with a different dielectric surface

Yang

Jiang

Huang

et al. 2020

IET Science, Measurement & Technology

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“…Insulator plays an important role of electrical insulation and mechanical support in the transmission line, and its icing may cause ice flashover which would lead to the interruption of power supply [1][2][3][4][5][6]. Hot water deicing for insulators belongs to the melting process with phase change.…”

Section: Introductionmentioning

confidence: 99%

Hot Water Deicing Method for Insulators Part 2: Analysis of Ice Melting Process, Deicing Efficiency and Safety Distance

et al. 2020

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In this paper, the heat balance integral method was employed to solve the internal temperature of ice layer and the position of melting interface by stages, due to its main advantage of converting the governing partial differential equation to an ordinary differential one, which can effectively reduce numerical efforts. Then the deicing time of hot water for insulator was calculated and analyzed. Taking LXY-120 insulator as the verification object, after natural icing at Xuefeng mountain natural icing test base, the validation experiments of deicing time were carried out in the natural environment. The initial water temperature and outlet pressure were optimized for deicing efficiency. Finally, the leakage current of water jet was measured. The research results indicate that the deicing rate increases and the energy consumption gradually decreases as the initial temperature of hot water increases. As the outlet pressure increases, the deicing rate increases. For the deicing condition of 1.2 mm nozzle, ambient temperature of-1 ºC , wind speed of 3 m/s, ice weight of 2 kg/piece and deicing distance of 2 m, when the initial temperature of hot water and outlet pressure are 85.21 º C and 3.35 MPa respectively, the comprehensive deicing efficiency is the highest. The leakage current through water jet decreases with the increasing distance. The leakage current increases with the increase of water conductivity and outlet pressure. Hot water deicing for insulator in 110 kV system can be carried out according to the safety distance of the existing regulation.

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DC flashover performance of ice‐covered insulators under complex ambient conditions

Cited by 22 publications

References 23 publications

Analysis of the Icing Accretion Performance of Conductors and Its Normalized Characterization Method of Icing Degree for Various Ice Types in Natural Environments

Analysis of the Icing Accretion Performance of Conductors and Its Normalized Characterization Method of Icing Degree for Various Ice Types in Natural Environments

Influence of electric field on the ice‐coating process of insulators with a different dielectric surface

Hot Water Deicing Method for Insulators Part 2: Analysis of Ice Melting Process, Deicing Efficiency and Safety Distance

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