Probability Ordered Tree-Based Contingency Screening Method for Power Grids

Contingency screening to generate the expected fault set is important for the power grid reliability evaluation. However, most existing screening methods are not efficient enough, and they may omit some high-frequency contingencies caused by high-order faults, which would impact the accuracy of reliability evaluation. Therefore, based on the probability distance and probability-ordered tree, this paper proposes a novel contingency screening method. The simulation results of RBTS and RTS79 show that, compared with the traditional sorting method, the algorithmic complexity of the proposed method is independent of system size and has higher efficiency.