In the decision-making of power system restoration

if the failure risk of transmission lines is not considered

the risk of restoration scheme will increase

and even lead to the failure of restoration. In this paper

a dynamic decision-making method for power system partition restoration considering transmission line failure risk is proposed. The partition restoration scheme is dynamically adjusted according to the change of transmission line failure scene during the restoration process. Firstly

the influence of transmission line failure on the partition restoration process is analyzed. Then

the continuity constraints of restoration logic before and after transmission line failure are described. The restoration risk index based on risk theory and the difference index of partition restoration process based on restoration density are constructed

and the dynamic optimization model of partition restoration considering line failure scenario is established. Finally

this paper combines the time window rolling optimization and forward-to-the-end rolling optimization to solve the optimization problem. The simulation results of the New England 10-machine 39-bus system show that the proposed method can effectively reduce the restoration risk.