where the system is once again stable.
In this letter, this result is rationalized using the well-known
equal area criterion which uses a comparison of the acceleration
and deceleration energies [1]. Precise numerical values
for can be obtained by detailed electromagnetic
transient simulation. Note that this phenomenon is not the same
as multi-swing transient instability, which is a phenomenon
where generators do not lose stability in the first post-clearance
swing, but do so in subsequent swing(s) [2], [3