Analysis of Cascading Failures in the Study of Power System Resiliency

Most transmission lines are at present heavily overburdened due to the deregulated environment. The more stressed the lines are, the more vulnerable they are to extreme natural catastrophes, and if they fail, the line flows of comparatively less stressed lines are hampered. The initialization of a cascading situation is crucial to take into account when discussing resilience because it is one of the effects of the power system on high-impact low-frequency events. The system's line with the largest power flow among all the lines is purposefully left off in this analysis to assess the resiliency of the system. Due to this line discarding, the MATPOWER extension platform detects the spread of cascading failure and islanding formation. Four metrics have been thoroughly compared between the two scenarios, with and without removing the lines. This reveals that the lines with significant higher power flows are vulnerable and can disrupt the system's other components.