Two-Stage Topology Identification Method for Distribution Network Via Clustering Correction

The accurate topology of distribution network has a significant impact on power flow calculation, reliability evaluation and system operation. However, due to frequently reconfiguration and modification of switches, the topology is hard to maintain. In this paper, a novel two-stage method is proposed to identify the connection relationships between distribution transformers and feeders. In stage 1, a new correlation indicator is adopted to screen out the unsure distribution transformers which are doubted of being incorrectly connected. In stage 2, unsure distribution transformers are assigned to the most likely feeders, and then incorrectly connected distribution transformers are found out by clustering correction. The proposed two-stage method can help operators to correct the topology errors. Cases studies in actual distribution network verified the effectiveness of the proposed method and correlation indicator.