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In my opinion, there are two possible reasons for this

First, it could be due to the different number of iterations it took for the PF calculation to converge. When the PF calculation converges, a message like "Reached tolerance in 10 iterations" is output, which means the number of iterations it took for the PF calculation to converge. The larger this number of iterations is, the more time the calculation can take.

Secondly, there may be more overloading and it took a long time to save it as an excel file. I recommend checking the capacity of your excel file.

Alternatively, use psspy.pssehalt_2() to completely shut down psse and then use psspy.psseinit(150000)

I hope this helps in some small way.

In my opinion, there are two possible reasons for this

First, it could be due to the different number of iterations it took for the PF calculation to converge. When the PF calculation converges, a message like "Reached tolerance in 10 iterations" is output, which means the number of iterations it took for the PF calculation to converge. The larger this number of iterations is, the more time the calculation can take.

Secondly, there may be more overloading and it took a long time to save it as an excel file. I recommend checking the capacity of your excel file.

Alternatively, use psspy.pssehalt_2() to completely shut down psse and then use psspy.psseinit(150000)

I hope this helps in some small way.