Dear Dr. Zimmerman and Friends

I have a query about updating the Ybus matrix. While running the power flow
on any system, it is possible that some of the generators will hit their
respective reactive limits, and change from a PV to a PQ bus. When this
happens, how can I update the Ybus matrix which will factor in, this
topology change? (Adding the synchronous reactance!!)

*Aaqib Ahmad*

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