Perform multiple simulations and increase fault clearing time in each simulation until you see that rotor angle doesn’t return back after first swing. The clearing time before rotor angle doesn’t return back after first swing will be the critical clearing time.
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Dear mr. Farhan.
How can we find the critical clearing angle at the graph of rotor angle??
Many thanks for you
Perform multiple simulations and increase fault clearing time in each simulation until you see that rotor angle doesn’t return back after first swing. The clearing time before rotor angle doesn’t return back after first swing will be the critical clearing time.