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題 名 | Optimal Design of Large Grounding Grids Based on Simulated Annealing Method=以模擬退火法進行大型接地網之最佳設計 |
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作 者 | 周至如; | 書刊名 | 中原學報 |
卷 期 | 26:3 1998.08[民87.08] |
頁 次 | 頁77-85 |
分類號 | 448.345 |
關鍵詞 | 大型接地網; 模擬退火法; Large grounding grids; Simulated annealing; |
語 文 | 英文(English) |
英文摘要 | This paper proposes the optimal design of large grounding grids based on simulated annealing method, in which the configurations of grounding grids are well determined to satisfy the requirements of the safety and equipment grounding and to attain a minimum cost. In the method, the cost function and the constraints of the safety and grid configuration parameters are first constructed for formulating the optimization problem of the design of large grounding grids. The constraints of the safety include the limitations of the step voltage, grounding potential rise (GPR) and grounding resistance; the constraints of grid configuration parameters consider the mesh dimensions, burial depth and conductor sizes of grounding grid to fit equipment grounding requirements and field conditions. In addition, the solution algorithm based on simulated-annealing (SA) for searching optimal solution is developed. The practical aspects of large grounding grids which can consist of several areas with different equipment grounding requirements are considered in the problem formulation and solution algorithm, so the corresponding design results are more realistic than those of other conventional designs. Finally, a practical case of designing a large grounding grid in a 69kV substation with 3000 m �� partition into four areas is presented to demonstrate the superiority and availability of the SA method and proposed design results. |
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