本論文探討地下電纜管路布設的最小間距，在符合台電系統送電容量規劃準則下，使用不同土壤熱導係數作為變數，找出兩排管路的最小間隔距離。並且評估管路與涵洞為抑低電力頻率磁場強度而使用金屬板屏蔽時，屏蔽前後對電力電纜送電容量的影響。應用有限原素法套裝軟體FLUX3D建立電力電纜模擬架構，分析各種涵洞與管路的溫度分布情況，計算出電力容量。由模擬結果可得電力電纜在各種架構中的溫升與溫度分布特性，而且屏蔽板對送電容量影響很輕微。

The purpose of this thesis is to study the minimum interval of underground cable pipelines, According to the criterion of Taiwan power company about transmission capacity. Using the thermal conductivity parameter of different soil, it is to find the minimum distances of two rows of pipelines. If the pipeline and culvert use the shielding metal plates to reduce power-frequency magnetic field. It is to obtain the influence on the transmission capacity of power cables. The FLUX3D, a finite element based simulation tool, is used to establish the simulation models for power cables, analysis the distribution of temperature in different culvert and pipeline, and calculate the transmission capacity. From simulation results, it can get temperature rises and temperature distribution characteristic in various kinds of structure of power cables. It is negligible that the shielding board influences the amount of current carrying capacity.

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