NDLI: Enhanced heat transfer characteristics and ampacity analysis of a high-voltage overhead transmission line under aeolian vibration

Content Provider	IET Digital Library
Author	Zhang, Meng Xu, Jiankun Zhao, Guifeng Hao, Guanyang
Abstract	High-voltage overhead transmission lines feature both electrical conductivity and mechanical strength properties. Current studies of the aeolian vibration of transmission lines focus primarily on the mechanical properties of these lines but rarely address the lines’ enhanced heat transfer properties, which directly affect transmission line ampacity. In this study, the authors analyse the vibration-enhanced heat transfer characteristics of an energised transmission line undergoing aeolian vibration based on the coupled fluid–solid numerical method. The allowable ampacity is calculated using the heat balance method, which accounts for the heat transfer enhancement effect arising from aeolian vibration. Various parameters, such as the vibration amplitude and the ratio between the natural frequency of the conductor and the frequency of the vortex shedding, are investigated. The results demonstrate that aeolian vibration can effectively improve the heat dissipation effect of the conductor and significantly increase the line ampacity. The maximum heat transfer effect occurs in the lock-in region, in which the allowed ampacity can increase by more than 6%.
Starting Page	2918
Ending Page	2925
Page Count	8
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 12, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.1764
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-03-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Aeolian Vibration Ampacity Analysis Coupled Fluid-solid Numerical Method Electrical Conductivity Property Heat Balance Method Heat Dissipation Effect Heat Transfer High-voltage Overhead Transmission Line Load Shedding Mechanical Strength Property Numerical Analysis Numerical Method Overhead Line Conductor Overhead Power Line Power Overhead Line Power System Economics Power System Managemen Power System Operation Vibration-enhanced Heat Transfer Characteristic Vortex Shedding Vortices
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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