School of Electric Power, South China University of Technology, Guangzhou 510640, China

With the wide application of information and communication technology in distribution network, the degree of cyber physical coupling of distribution network is gradually deepened. The existing reliability model of the cyber-physical system (CPS) of distribution network is difficult to accurately evaluate the reliability of complex scenarios in practical engineering application. In this paper, multi-state reliability models are established for coupling components based on their failure cases, and cyber failure scenarios of distribution network are traversed based on full binary tree topology. Thus, a novel reliability analysis method is proposed. This method takes into account the actual fault handling process and transfer capacity constraints, and is applicable for all distribution network topologies with open-loop operation. It provides a feasible method for evaluating the reliability of the stock CPS of distribution network. Finally, taking an actual distribution network in a city as an example, the feasibility and effectiveness of the proposed reliability evaluation method of the CPS of distribution network is verified.

This work is supported by National Natural Science Foundation of China (No. 51777078).