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An Analysis of the Magnetic Field of Transmission Lines and its Suppression Approaches

This thesis presents a computational analysis of the magnetic field of low-frequency power transmission lines, and the approaches to its suppression. First, according to the structure of Taiwan's three-phase A.C. transmission network, this research calculated the distribution of conducting wires' magnetic field under specific configuration by applying the theories of Near-field effect, Biot Savart's law, and double complex number. Second, this research explored the features of various approaches to magnetic field suppression with magnetic-field vector analyses and Matlab simulations. Finally, two magnetic-field cancellation methods, the ¡§circuit space arrangement¡¨ and ¡§time phase permutations¡¨ were adopted to investigate their magnetic effects under various structures and combinations of transmission lines. This study reveals that the magnetic field can be effectively suppressed by using appropriate configuration of transmission lines in space and phase. By applying the result to the design and construction of transmission lines, we can meet not only the requirements of magnetic field reduction, but also the needs of the least cost.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0626106-105628
Date26 June 2006
CreatorsSu, Feng-chi
ContributorsTa-peng Taso, Whei-min Lin, Shi-Jaw Chen, Fu-sheng Cheng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0626106-105628
Rightsunrestricted, Copyright information available at source archive

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