A 2D numerical study on the effect of conductor shape on icing collision efficiency

Jian Zhang, Lasse Makkonen, Qing He

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Icing on transmission lines is a serious threat to safe operation of power grids. Ice accretion on power lines includes two processes, which are the collision between water droplets and a conductor, and the freezing of water on the conductor. In the previous studies on the collision efficiency, a circular shape of a conductor has been assumed. In this work, the change of conductor shape is specified through changing the number of the conductor strands, and the influence of this on the collision efficiency is analyzed by Fluent. The results show that the relationship between conductor strand number and the collision efficiency is quite small, but different under different conditions, such as wind speed and median volume diameter of water droplets. From the point of view of the icing rate in the beginning of an icing event, the optimal conductor size and shape which lead to minimizing the collision efficiency can be calculated based on the local historical weather data using these results provided that accurate micro-meteorological data are available.
Original languageEnglish
Pages (from-to)52-58
Number of pages7
JournalCold Regions Science and Technology
Volume143
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

collision
droplet
Water
power line
Freezing
Ice
Electric lines
water
freezing
wind velocity
accretion
effect
weather
ice

Keywords

  • transmission lines
  • icing
  • collision efficiency
  • conductor shape
  • conductor strand number

Cite this

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abstract = "Icing on transmission lines is a serious threat to safe operation of power grids. Ice accretion on power lines includes two processes, which are the collision between water droplets and a conductor, and the freezing of water on the conductor. In the previous studies on the collision efficiency, a circular shape of a conductor has been assumed. In this work, the change of conductor shape is specified through changing the number of the conductor strands, and the influence of this on the collision efficiency is analyzed by Fluent. The results show that the relationship between conductor strand number and the collision efficiency is quite small, but different under different conditions, such as wind speed and median volume diameter of water droplets. From the point of view of the icing rate in the beginning of an icing event, the optimal conductor size and shape which lead to minimizing the collision efficiency can be calculated based on the local historical weather data using these results provided that accurate micro-meteorological data are available.",
keywords = "transmission lines, icing, collision efficiency, conductor shape, conductor strand number",
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A 2D numerical study on the effect of conductor shape on icing collision efficiency. / Zhang, Jian; Makkonen, Lasse; He, Qing.

In: Cold Regions Science and Technology, Vol. 143, 2017, p. 52-58.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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AU - Zhang, Jian

AU - Makkonen, Lasse

AU - He, Qing

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AB - Icing on transmission lines is a serious threat to safe operation of power grids. Ice accretion on power lines includes two processes, which are the collision between water droplets and a conductor, and the freezing of water on the conductor. In the previous studies on the collision efficiency, a circular shape of a conductor has been assumed. In this work, the change of conductor shape is specified through changing the number of the conductor strands, and the influence of this on the collision efficiency is analyzed by Fluent. The results show that the relationship between conductor strand number and the collision efficiency is quite small, but different under different conditions, such as wind speed and median volume diameter of water droplets. From the point of view of the icing rate in the beginning of an icing event, the optimal conductor size and shape which lead to minimizing the collision efficiency can be calculated based on the local historical weather data using these results provided that accurate micro-meteorological data are available.

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