Research on Topology Identification Method for Historical Data of Flexible Interconnected Distribution Network with SOPs

In recent years, the topological relationships in the MV distribution system of flexible interconnected distribution networks have become increasingly complex due to the development of distributed power supply. To address the issue of topology identification for historical bulk data, the Split-EM algorithm is investigated. This algorithm does not rely on the number of topology categories in historical data. It is used to analyze the accuracy of SOP node pairs in MV distribution networks. For data samples that contain the history of multiple topology classes, the model recognizes all topology classes and determines the specific topology type to which each sample belongs. Finally, the IEEE 33-node MV distribution network is taken as an example to expand the SOP node pairs and identify historical data. The effectiveness of the proposed method is verified by analyzing the identification results.