Reliability Assessment of Active Distribution Network with Unclear Topology

In order to evaluate the reliability of distribution network with unclear topology, firstly, the reliability indices of three typical connection modes are calculated, and the reliability assessment model for distribution network with unclear topology is constructed. Then, considering the output characteristics and islanding operation of the distributed generation, typical connection modes are modified with the distributed generation access probability, and the influence of the distributed generation on the reliability is taken into account. Finally, the distribution network of Huizhou Huidong in 2019 is selected for analysis. The error of this method is 9%, and the distributed generation has little influence on the average interruption duration of regional distribution network. The results show that this method accurately reflects the reliability of distribution network with unclear topology, and fully considers the influence of distributed generation.