Hi,
I am trying to create a bigger test case by duplicating a MatPower test
case (>= 2383 buses) multiple times. To have connectivity between each of the
bigger areas, I've added randomly chosen tie lines. However, I am not able to
get power flow to converge.
Monitoring the residual norm shows that Newton convergence is linear in the
first few steps and then it diverges. I suspect that this might be due to the
initial guess given to Newton. My premise is based on observing that if a flat
start is chosen for some (or all?) of the MatPower test cases (>= 2383 buses),
Newton doesn't converge and has a similar divergence pattern.
I was wondering whether the bus(:,VM:VA), which is part of the initial guess
to Newton, data was computed using some algorithm or provided by the test case
data provider.
Thanks and appreciate your help as always!
Shri
