Dynamic Response Characteristics of Ice-Shedding on Multi-Span Transmission Lines Under Non-Uniform Icing Conditions

YANG Chunxia; HE Wenqi; LIU Huicong; CUI Hongzhi; ZHANG Zijian

doi:10.3724/j.gyjzG23012603

Volume 55 Issue 8

Aug. 2025

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YANG Chunxia, HE Wenqi, LIU Huicong, CUI Hongzhi, ZHANG Zijian. Dynamic Response Characteristics of Ice-Shedding on Multi-Span Transmission Lines Under Non-Uniform Icing Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 210-216. doi: 10.3724/j.gyjzG23012603

Citation:

YANG Chunxia, HE Wenqi, LIU Huicong, CUI Hongzhi, ZHANG Zijian. Dynamic Response Characteristics of Ice-Shedding on Multi-Span Transmission Lines Under Non-Uniform Icing Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 210-216. doi: 10.3724/j.gyjzG23012603

Citation:

YANG Chunxia, HE Wenqi, LIU Huicong, CUI Hongzhi, ZHANG Zijian. Dynamic Response Characteristics of Ice-Shedding on Multi-Span Transmission Lines Under Non-Uniform Icing Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 210-216. doi: 10.3724/j.gyjzG23012603

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Dynamic Response Characteristics of Ice-Shedding on Multi-Span Transmission Lines Under Non-Uniform Icing Conditions

doi: 10.3724/j.gyjzG23012603

College of Civil Engineering, Changsha University of Science and Technology, Changsha 410000, China

Received Date: 2023-01-26
Available Online: 2025-10-24

Abstract

Abstract

A finite element model of the insulator-string-conductor system was established to investigate the influence of uneven ice-coating on the dynamic responses of iced transmission lines subjected to ice-shedding. Three parameters of ice section location, ice section length, and basic ice thickness were defined to characterize the non-uniform ice-coating conditions. The ice-shedding dynamic responses of non-uniformly iced conductors under different icing characteristics and line parameters were analyzed. Furthermore, the influence law of each parameter on the maximum ice-jump amplitude and the maximum unbalanced tension was studied. The numerical results showed that for the same total ice load on the ice-shedding span, non-uniformly iced conductors generated more severe ice-shedding responses compared to uniformly iced conductors; the most unfavorable position of the non-uniformly iced segment was related to the span length. When the ice-shedding span was 700 m or less, the closer the position of the non-uniformly iced segment was to the mid-span, the greater the conductor’s jump height and unbalanced tension became. When the length of ice-shedding span exceeded 700 m, the condition became more unfavorable if the ratio of the horizontal distance (between the midpoint of the iced segment and the left suspension point) to the span length was 0.3.
- transmission lines,
- ice-shedding jumping,
- non-uniform icing,
- dynamic response,
- most unfavorable case

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References(20)

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