John, MATPOWER’s power flow does not do a topology check to find isolated buses and islands. So, any isolated bus i needs to have its bus type set to None (4) -- mpc.bus(i, BUS_TYPE) = 4. If you want to find out which buses get isolated when the status of one or more lines changes then use the routines case_info()<http://www.pserc.cornell.edu/matpower/docs/ref/matpower5.0/case_info.html> or find_islands()<http://www.pserc.cornell.edu/matpower/docs/ref/matpower5.0/find_islands.html>.
Shri From: <bounce-123563179-83436...@list.cornell.edu> on behalf of John Cynn <johncy...@gmail.com> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Date: Sunday, April 28, 2019 at 9:39 AM To: "MATPOWER-L@cornell.edu" <MATPOWER-L@cornell.edu> Subject: Isolated Bus - Power flow solution Hi All, I had a question regarding matpower solution when a bus might get isolated. For example, changing the status of a line or lines causes a bus to be isolated/islanded. I think the power flow does not converge when such scenario occurs. Is there a way to handle this automatically and change bus status to isolated? Any suggestions on handling islands? Thanks. John
