Reliability Calculation Method for Power Distribution Networks Based on Topological Similarity

In order to realize the fast and accurate assessment of distribution network power supply reliability, the concept of topology similarity is introduced, and the reliability assessment method of distribution network grid frame based on topology similarity analysis is proposed. The mathematical quantitative relationship between the similarity of grid topology and the reliability of distribution grid power supply is investigated by taking the sequence of singular values as the similarity index solution target. Firstly, the matrix representation of distribution network topology, similarity index and its determination method are given, and the compression and reconstruction of the matrix are analyzed to ensure the topological structure characteristics maintained by neighboring matrices; then, a new algorithm for power supply reliability assessment based on topological similarity is proposed, which is based on the topol ogy database. The similarity is determined by the root-me an-square method and the reliability index is corrected, and at the same time., a The algorithm is based on the topology database., the similarity is determined by the root-mean-square method., the reliability index is corrected., and the calculation process of rapid assessment of power supply reliability is given; finally., the topology of distribution network of IEEE33 nodes is utilized for the case study., and the results of the study show that compared with other algorithms of the same kind. The computational efficiency of the proposed m ethod can be improved by more than seven times under the premise of guaranteeing high computational accuracy. The thesis research has a certain reference and guiding significance for the research of improving power supply reliability assessment of distribution networks.