Topological Identification of Distribution Network Based on μPMU Voltage Phase Data

Abstract

The structure of distribution network becomes more and more complex. In order to ensure the safety and stable operation of the system, it is necessary to obtain the current network structure in real time. In order to meet the requirement that the distribution network topology recognition must be fast and accurate, a distribution network topology recognition method based on micro-synchronous Phaser Measurement Unit (μPMU) is proposed. Firstly, the topology identification criterion is constructed by using the voltage and phase data before and after the topology change. Then, a topology recognition algorithm based on phase difference is proposed to analyze the difference between the voltage phase and the actual phase under different topology conditions, and the topology corresponding to the minimum difference is selected as the actual topology to realize the correct recognition of the distribution network. Finally, a simulation example is given to verify the correctness of the proposed method, and the influencing factors of topology recognition are analyzed. The results show that the criterion is correct and reliable, and the proposed topology recognition algorithm has high recognition accuracy.