A Method for Cascading Failure Simulation based on Static Security Analysis

In modern power system, a single fault seldom leads to the catastrophe like blackout, but often causes other faults, which result in cascading failures and blackouts. Therefore simulate the cascading process of power system is more meaningful than a single device contingency analysis. Against such backgrounds, this paper proposes a method for cascading failure simulation with static security analysis method, which considers the load variation during the fault. The method is divided into two steps: firstly, a self-adapting step is figured out with the climbing rate of the daily load curve, and secondly, the power flow at the self-adapting step, which is used to judge if another fault or even the cascading event has happened is calculated. In this way, the process of cascading failure can be simulated and monitored, which is beneficial for the operators to obtain the operating state of the power system in time and adopt appropriate measures to prevent the system from deteriorating into a large-scale blackout accidents. Finally, the standard IEEE 30-bus testing system is adopted to verify the correctness of the method.