Flow field distribution around insulator and contamination uneven characteristic of insulator

Huang, Yanchen; Huang, Xinbo

doi:10.1049/iet-smt.2020.0277

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Qiao et al [4] simulated the pollution accumulation process of insulators by CFD software Ansys 15.0 and studied the pollution distribution of insulators with different shapes. Huang et al [5] explored the law of pollution accumulation on the surface of insulators by combining fluid dynamics calculation and experimentation. The results showed that when the wind speed was 3-7 m/s, the boundary layer separation existed for pollution particles within a 1-60 µm particle size, while the increase in wind speed and particle size of pollution would aggravate the nonuniformity of pollution accumulation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Zhang,

Chen,

Jiang

et al. 2023

Energies

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Railway system insulators are affected by pollution, altitude, and other environmental situations during operation, which causes reduced electrical performance or even flashover accidents. These factors threaten the safety of railway operations in high-altitude areas. However, the natural contamination characteristics of a railroad in a plateau area is still unclear. In this study, a natural pollution accumulation test for railway insulators in a high-altitude area was carried out, and the distribution rules of nonsoluble deposit density (NSDD), equivalent salt deposit density (ESDD), NSDD/ESDD ratio, and nonuniformity (T/B) of the pollution distribution of the tested insulators were calculated. Meanwhile, the chemical compositions of the pollution from different test sites were analyzed. The differences of pollution accumulation between railway insulators and suspended insulators of a power system and the influencing factors were compared and analyzed by combining with a numerical simulation. The results show that the pollution level of railroad insulators is mainly distributed in level b and above. A pollution sample is mainly composed of sodium chloride, while the NSDD/ESDD ratio of pollution is mostly distributed from 0 to 5, with T/B value ranges from 1/0.62 to 1/1.76. The amount of insulator contamination is influenced by the location inside and outside the tunnel. Additionally, the pollution amount is influenced by the structure and type of insulators. Finally, this paper studies the creepage distance and structural height required by railway insulators in a plateau area according to the natural pollution accumulation characteristics of railway insulators, which can provide a reference for a railway electrical external insulation configuration in a high-altitude area.

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Section: Introductionmentioning

confidence: 99%

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Zhang,

Chen,

Jiang

et al. 2023

Energies

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“…Li Te et al [25] studied the difference in the contamination characteristics between the composite rod insulator and the standard disc suspension insulator, and found that the contamination difference between the upper and lower surfaces of composite insulator was smaller than that of standard suspension insulators. Huang Yanchen et al [26] investigated the relationship between the contamination accumulation on the insulator surface and the distribution of the flow field around the insulator. In their work, when the wind speed was 3∼7 m/s, there was obvious separation of the boundary layer, and the contamination accumulation on the insulator surface was closely related to the distribution of the flow field around the insulator.…”

Section: Introductionmentioning

confidence: 99%

Study on the Contamination Characteristics of V-Type Double Suspension Rod Insulators Based on the Influence of Wake Flow

et al. 2022

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The insulators of the catenary of the Lanzhou-Xinjiang High-speed Railway in windy areas suffer from serious contamination, which has led to frequent flashover accidents. The catenary of the Lanzhou-Xinjiang High-speed Railway has adopted the unique external insulation of V-type double suspension rod insulators. To further determine the contamination characteristics of this type of insulator, a contamination simulation model of insulator is established in this paper based on the principles of fluid mechanics, which is used to analyze the contamination characteristics of the V-type double suspension rod insulators under the influence of wake flow. The research results show that wind speed directly determines the static pressure on the surface of the insulator, the wind speed and particle concentration are proportional to the contamination volumes on the windward and crosswind sides of insulator, while the particle size is inversely proportional to the contamination volume on the leeward side of the insulator. The direction of wake flow is consistent with the direction angle of external incoming flow, and the wake flow generating area affects the contamination characteristics of the insulator. When the incoming flow is at a prevailing wind direction of 0°, focus should be put on the windward and crosswind sides of the two insulators during insulator cleaning, and the contamination distributions on these two insulators are similar; when the incoming flow is at a prevailing wind elevation of 0∘∼60∘, focus should be put on the entire surface of 1# insulator and the windward and crosswind sides of 2# insulator during insulator cleaning.

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Simulation Research on Motion of Fog Droplets Around Suspension Porcelain Insulator in Salt Spray Environment

Shen¹,

Liu²,

Hu³

et al. 2023

Lecture Notes in Electrical Engineering

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Flow field distribution around insulator and contamination uneven characteristic of insulator

Cited by 7 publications

References 25 publications

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Analysis of Natural Pollution Accumulation Characteristics of Insulators for Railroads in High-Altitude Environment

Study on the Contamination Characteristics of V-Type Double Suspension Rod Insulators Based on the Influence of Wake Flow

Simulation Research on Motion of Fog Droplets Around Suspension Porcelain Insulator in Salt Spray Environment

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