NDLI: Thermal grading around overhead transmission line under various environments and its influence to load capacity

Content Provider	IEEE Xplore Digital Library
Author	Lihua Chen Zhong Zheng Shaoyu Liu Liang Guo Chun Dun
Copyright Year	2012
Description	Author affiliation: State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, Beijing Key Laboratory of High Voltage & EMC, North China Electrical Power University, 102206, China (Lihua Chen; Zhong Zheng) \|\| North China Electrical Power Research Institute, Beijing, 100045, China (Shaoyu Liu; Liang Guo; Chun Dun)
Abstract	The transmission capacity of overhead transmission lines is limited largely by its operation temperature, which is determined by the competition between the heat generation by load current and the heat dissipation into the environment. The ohmic heat generation is a function of the conductor resistivity, which is a function of its temperature and current distribution inside the conductor, taking the skin effect into account. The heat dissipation is influenced by the temperature of the conductor and the air, the surface condition of the conductor, the wind, the sunshine, and the humidity of air, etc. Finite Element Analyses are carried out in this paper to calculate the thermal dynamics by coupling the thermal field and the fluid mechanical models. The results show the temperature distribution and the evolution history in the conductor - air system under various environment conditions. Thus the maximal load level can be defined accordingly. The calculation also gives the time required for the conductor to reach equilibrium with load and environment changing. This information can help the grid operators to decide how to dispatch the loads among multiple transmission lines, either as a temporary routing or as a steady state solution.
Starting Page	545
Ending Page	548
File Size	278014
Page Count	4
File Format	PDF
ISBN	9781467304887
ISSN	1089084X
e-ISBN	9781467304870
e-ISBN	9781467304863
DOI	10.1109/ELINSL.2012.6251529
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductors Atmospheric modeling Humidity Heating Power transmission lines Temperature distribution Wind speed Fluid Mechanical Finite Element Analyses Overhead Transmission Line Thermal Grading Load Capacity
Content Type	Text
Resource Type	Article

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