Abstract
In this paper, the concept of topological similarity is introduced to realize a fast and accurate reliability assessment of distribution network. Based on the singular value sequence as the similarity index, the mathematical relationship between similarity of network topology and power supply reliability of distribution network is developed. Firstly, the matrix representation, similarity index and its determination method of distribution network topology are presented, while the compression and reconstruction of matrix are analyzed to ensure the topological characteristics of adjacent matrix. Then, a fast reliability assessment algorithm of distribution network based on topological similarity is proposed, which uses root mean square method to determine similarity according to topology database and updates reliability indexes, together with the calculation flow. Lastly, case study of IEEE 33-node distribution network is undertaken, which shows that the calculation efficiency of the proposed algorithm is seven times higher than that of other conventional algorithms under the same calculation accuracy.
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