Hello,
I am interested in power system islanding. I know that in load flow we need to
specify a reference bus but in OPF the situation is different. So why in each
islands a reference bus helps convergence? Particularly my question relates to
the following comment which pops up when we specify more than one reference bus
during opf.
"opf_setup: Warning: Multiple reference buses.
For a system with islands, a reference bus in each island
may help convergence, but in a fully connected system such
a situation is probably not reasonable."
I have an example of a 14 bus case in which if we dont specify reference bus in
each island it diverges but converges with the reference bus in two islands. I
suppose this is due to some default setting in matpower because in my islanding
optimization code every thing works without specification of ref bus in islands.
Thanks
Kind regards,
Waqquas
