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How to do cascading failure simulation

Deal all,

I would like to do the cascading failure simulation to find the load shedding after few line trip. My simulation steps are:

1.Trip one random line or the line from step 2 and do AC corrective action. Should I trip the line first or write the trip code in .con file?

2.Search branch's power flow to find the maximum loading level. The line may be the next line to trip. If one line is going to trip, back to step 1; If not, go to step 3. How can I achieve this efficiently?

3.Calculate total load shedding by AC corrective action and record it. Recover the tripped line and back to step 1 to start next simulation. How can I get load shedding from ac corrective action?

Thanks for your help.