I can envision that this method of randomly connecting two systems might
easily create unsolvable systems, with wild angular differences even if
solvable. That is not how transmission networks are designed.
Shri wrote:
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
