以物件導向專家系統 進行多時段負載轉供

Development of an Object-Oriented Expert System for Multi-Period Load Transfer

吳武昌(Wu-Chang Wu)

指導教授 ： 蔡孟伸

中原大學/工學院/電機工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200286

摘要

在配電自動化的系統中，復電的過程須藉由配電系統上的區段開關（Sectionalizing Switch）與連絡開關（Tie Switch）間的切換動作，即改變有關的開關之投、切狀態，來完成復電的目標。這些開關狀態的描述多為邏輯上的推論而較少有數學上的運算，所以很適合用專家系統來實現之。因此，本論文利用CLIPS語言建構一配電之復電專家系統，並使用其特有的物件導向功能來架構配電系統。如此做法與傳統的專家系統差異處在於，本系統可以對應真實的配電系統，經由資料庫或是系統操作員輸入相關事實，即時更新各物件的屬性，如此不僅在程式撰寫上更加容易，也增進系統的可信度。
於專家系統知識庫中的知識乃是參閱文獻上的經驗法則，整體復電策略分為四個階段：群集復電、區域復電、負載轉供與最大區域復電。本論文另一特點，即是考量負載量並非定值，於不同時間下負載量應會變動，因此，使得復電策略的推論更為準確、實用與有效。為驗證所提的方法的可行性，本論文將模擬兩組配電系統，比較負載量固定與有變動的情況下所得之復電策略。從結果得知，考量負載的時間性的確有其必要性；再者，考量不同的故障情況下，專家系統依配電系統現況而產生之不同復電策略的結果，此結果顯示了，於任何情況下，本專家系統皆能迅速且正確的提出較適合、有效益的復電策略。

關鍵字

配電系統 ； 物件導向 ； 專家系統 ； 復電 ； CLIPS

並列摘要

In distribution automation, restoration process is done by switching actions of sectionalizing switches and tie switches on the system. The determination of the state of these switches is mainly logical reasoning with less mathematical process. Thus, knowledge-based systems are ideal tools to accomplish the task. In this thesis, CLIPS is used to develop the proposed system by taking advantages of its object-oriented feature. When applying object-oriented technique, the actual status of a distribution system component can be reflected properly by updating the attributes of all objects.
According to the empirical rules of previous work, the distribution system restoration procedure can be divided into four stages: Group restoration, Zone restoration, Load transfer and maximum load restoration. The unique feature of the proposed expert system is that the variation of load currents is considered. By doing so, the restoration strategies can be more accurate, practical and effective. Simulations on distribution systems are performed, the results are compared with the same system which has constant load currents.

並列關鍵字

Expert System ； Restoration ； CLIPS ； Load Transfer ； Distribution system

參考文獻

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