Study of structural-thermal characteristics of electrified conductors under aeolian vibration

IF 1.3 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Wind and Structures Pub Date : 2021-08-01 DOI:10.12989/WAS.2021.33.2.155

Meng Zhang, Jian Zhou, Guifeng Zhao, Jiankun Xu, Chao Sun

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引用次数: 2

Abstract

High-voltage transmission lines are featured by electrical and structural properties. Current studies on aeolian vibration of transmission lines focus primarily on structural responses of unenergized conductors. However, moderate aeolian vibration can also enhance the convection heat transfer capability of a transmission line, which improves the steady current-carrying capacity. In this paper, a fluid-structure interaction (FSI) model is established to study the structural thermal characteristics of overhead electrified aluminum conductor steel-reinforced cable (ACSR) conductors. Moreover, the fatigue damage of the energized conductor is analyzed under operational conditions. Results show that there is considerable influence from aeolian vibration on the current-carrying capacity of energized conductors. Compared with the nonelectrical conductors, aeolian vibration can enhance the convective heat transfer effect of energized conductors. Additionally, fatigue life of electrified transmission lines is larger than that of nonelectrical conductors under aeolian vibration. The developed structure-fluid-thermal model can be used to aid design and operation optimization of transmission lines.

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风振作用下带电导体的结构热特性研究

高压输电线路具有电气和结构特性。目前对输电线路风成振动的研究主要集中在未通电导体的结构响应上。然而，适度的风振也可以增强输电线路的对流换热能力，从而提高输电线路的稳态载流能力。为了研究架空铝导体钢增强电缆(ACSR)导体的结构热特性，建立了流固耦合(FSI)模型。此外，还对通电导体在工作条件下的疲劳损伤进行了分析。结果表明，风振对通电导体的载流能力有较大影响。与非电导体相比，风振可以增强带电导体的对流换热效果。此外，电气化输电线路在风振作用下的疲劳寿命要大于非电导体。所建立的结构-流-热模型可用于输电线路的设计和运行优化。

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来源期刊

Wind and Structures 工程技术-工程：土木

CiteScore

2.70

自引率

18.80%

发文量

审稿时长

>12 weeks

期刊介绍： The WIND AND STRUCTURES, An International Journal, aims at: - Major publication channel for research in the general area of wind and structural engineering, - Wider distribution at more affordable subscription rates; - Faster reviewing and publication for manuscripts submitted. The main theme of the Journal is the wind effects on structures. Areas covered by the journal include: Wind loads and structural response, Bluff-body aerodynamics, Computational method, Wind tunnel modeling, Local wind environment, Codes and regulations, Wind effects on large scale structures.