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Spatial analysis of thermal aging of overhead power transmission lines Open Access


Other title
Overhead electric lines -- Fault location
Spatial analysis (Statistics)
Powerline ampacity
Type of item
Degree grantor
University of Alberta
Author or creator
Bhuiyan, Md. Mafijul Islam
Supervisor and department
Dr. Petr Musilek (Electrical and Computer Engineering)
Examining committee member and department
Dr. Aminah Robinson Fayek (Civil and Environmental Engineering)
Dr. Andrew Knight (Electrical and Computer Engineering)
Department of Electrical and Computer Engineering

Date accepted
Graduation date
Master of Science
Degree level
To meet increasing power needs of industrialized and urbanized consumers, power transmission companies are pressed to elevate the transmitted load in overhead power transmission lines. Increased loads impose thermal and mechanical stress, causing risks of transmission reliability. These risks can be mitigated by developing computational diagnostic tools for better scheduling of line inspections and maintenance. The thesis introduces a novel methodology for spatial analysis of conductor thermal aging based on historical weather data that can be performed at three different levels: point, line, and area. By utilizing this paradigm, the thermal state of an energized transmission line can be visualized, initiating a new dimension in thermal aging research. An advanced model for dynamic re-rating of existing transmission lines is introduced in the thesis to reduce the risk of sag. The performance of the thermal aging and re-rating models is examined using simulation data from the BC Hydro power transmission network.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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