| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 95 === The purpose of this thesis is to study the distribution characteristics of power-frequency magnetic field from overhead and underground tube power line when transfer the electric power through urban area. It is hoped to used in magnetic field analysis and mitigation method selection, and to obtain the distribution of magnetic field. At first, the finite element based simulation package, FLUX3D, can be used to establish the simulation model of overhead power line and to evaluate the magnetic field shielding effect of aluminum plate, silicon steel, stainless steel and Amumetal. It wants to obtain the effect in reduction of magnetic field, to choose the adequate material for the shielding, to reduce magnetic field flux density.
In evaluating the magnetic field conditions around the underground tube power line, the tube types, direction of current, and the depth of cables are studied. From the study results, the better arrangement of cables can reduce magnetic field. Therefore, it really has the effect on reduction of magnetic-field and should be a low cost method before the construction of the underground tube power line.
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