A Novel Grid Planning Method of AC/DC Distribution Network for Controllability and Flexibility Reinforcement

The high proportion of Distributed Generations (DGs) integration has led to significant changes in the structural form and power supply mode of distribution networks. The network structure is becoming increasingly complicated, and lacks the identity of the key and driver nodes of the distribution network. A grid planning method of AC/DC distribution network for controllability and flexibility reinforcement is proposed in this paper. Firstly, the distribution network is modeled as an undirected and unweighted network topology. Then, the heterogeneity of the network and the average degree of the nodes are adopted to evaluate the controllability of the distribution network based on complex network theory. And the line capacity margin and transformer capacity margin are used to evaluate the characteristics of flexibility. Finally, a 29-node distribution network is adopted to demonstrate the accuracy of the proposed method.