A Search Method for Controlled Islanding Surface Considering the Critical Nodes in Isolated Network

Controlled islanding is an important measure to ensure the stability of power system and avoid widespread power outages. However, the traditional research methods based on single-objective optimization neglect the isolated network. To address this issue, a controlled islanding strategy considering the critical nodes in proposed in this paper. Firstly, based on the electrical connections and power flow distribution between nodes, an initial islanding surface is determined with the objective of minimizing power flow impact. Then, considering the electrical coupling connectivity of critical nodes, the final islanding scheme is selected within the neighborhood search space of the initial surface to enhance the stability of isolated subsystems after islanding. The proposed method is simulated and validated based on the 39-noded system, and the simulation results validate the effectiveness and superiority of the method.