Modeling collapse and blackout of power system via AC-based model

The collapse and blackout caused by cascading failures in power system is a difficult problem. This work is concerned with the mechanism of collapse in large power systems. Firstly, a AC model for blackout is employed with OPF, which can describe the whole process of power system accurately; second, an algorithm is given to model the cascading failures with overloads and outages; thirdly, simulation performed on IEEE-30 bus system has verified that the proposed model and algorithm can reveal some collapse characteristics such as load level, outage lines and network structure