Resilience Evaluation Method Considering Critical Line Identification of Cascading Failure

With the access of large-scale new energy units, the risk of major blackouts caused by extreme disasters in the power grid increases. In order to realize the resilience assessment of the power grid based on cascading failures, this paper establishes a key link screening method based on the steady-state simulation framework of cascading failures. Based on the cascading failure data model with time sampling, the resilience of the power grid is evaluated according to the resilience assessment method with load shedding as the observation index. Based on the IEEE-30 BUS system, the simulation verification is carried out to obtain the effect of grid resilience improvement.