研究目的
To propose a novel method that efficiently finds all critical (unrestorable) line cuts in distribution networks to verify the network design for secure power delivery.
研究成果
The proposed method efficiently finds all unrestorable cutsets with no significant false negatives. It reduces the number of tests by five orders of magnitude compared to the naive approach, with each test executed in just a few seconds. The method is applicable to large-scale networks and provides a crucial tool for guaranteeing the restorability of distribution networks.
研究不足
The proposed method focuses only on line failures, since they are much more frequent than other failures like capacitor banks and switches. The method also puts an upper limit on the cutset size based on the maximum number of lines cut at a time, which might overlook some unrestorable cutsets.
1：Experimental Design and Method Selection:
The proposed method first runs a fast screening algorithm based on hitting set enumeration to select suspicious cuts without examining all possible cuts. Then, unrestorable cuts are identified from the suspicious ones with another algorithm that strictly tests the restorability of the network under each suspicious cut without redundantly repeating heavy power flow calculations.
2：Sample Selection and Data Sources:
Two datasets are used, a traditional small distribution network (32-Bus network) and a large-scale network closely modeling a typical Japanese distribution network (432-Bus network).
3：List of Experimental Equipment and Materials:
The experiments were conducted using a single core of an Intel Xeon CPU E7-8837 (2.67GHz).
4：67GHz).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The proposed method is applied to the datasets to find unrestorable cutsets. The method involves enumerating all feasible configurations, selecting suspicious cutsets, and testing network feasibility for these cutsets.
5：Data Analysis Methods:
The performance of the proposed method is evaluated based on the number of tests performed, the number of minimal unrestorable cutsets found, and the computation time.
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