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題 名 | 地下電纜線溝中鋼筋之渦流損失計算與線溝之熱傳分析=Computation of Eddy Current Loss Induced in the Structural Steels and Thermal Analysis Around Duct Bank |
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作 者 | 江奕旋; | 書刊名 | 樹德學報 |
卷 期 | 20 1997.07[民86.07] |
頁 次 | 頁47-58 |
分類號 | 448.36 |
關鍵詞 | 有限元素法; 地下電纜; 電纜線溝; Finite element method; Underground cable; Duct bank; |
語 文 | 中文(Chinese) |
中文摘要 | 地下輸電系統之投資成本比架空輸電線系統要高出很多,故在安全考慮之前提 下,如何選用適當載流容量的電纜,而不致造成浪費,是電力規劃者一個十分重要的課題。 電纜周圍環境的熱散逸好壞影響電纜之載流量大小。本文採用有限元素法來分析含鋼筋之地 下電纜系統,先計算出三相電纜之總損失,再以有限元素法求出附近鋼筋所感應之渦流損失 。其中,並以數組不同位置之鋼筋組合方式,來分析其對鋼筋渦流損影響。接著,更採用合 併電磁場及熱場之有限元素法來解決兩者之耦合問題,以獲得其對電纜溫昇之影響情形。所 得之分析結果,可提供電子規劃者設計地下輸電系統之參考。 |
英文摘要 | The capital investment on underground transmission system is high. Hence, evaluation of underground cable ampacity is the most important needs in power cable engineering and operation. The ampacity is determined by the maximun temperature at which the insulation of the cable can be operated and, by the method of heat dissipation through the cable and its surroundings. In this paper, the finite element method is used to solve the underground cable thermal field problem. Calculations of thermal fields of underground cable system taking account of structural steels constructed in it has been described. A finite element method is proposed to evaluate the losses in the cables and in the steels first, then these are used as the heat sources for thermal analysis. Several steel arrangments of a cable system are solved and compared. The results given are useful for the design of a cable duct bank with structural steels constructed in it. |
本系統中英文摘要資訊取自各篇刊載內容。