Hi;
There are diagrams for the ieee 30 bus system and the 118 bus system
around, may also for others.
I will send you these two in a separate mail.
carlos.
Shri wrote:
On Aug 20, 2012, at 11:11 AM, Carlos E Murillo-Sanchez
<[email protected]> wrote:
Power networks are usually almost planar, with a few exceptions in which lines
do cross each other without connection. The obvious place to connect a network
to another is in peripheral nodes, just a few of them should be common. But if
you don not have the geographical location of nodes this can be hard to do. On
the other hand, it might be possible that the person who put the data together
listed the buses and lines in some kind of systematic manner and it might
perhaps be possible to figure out a planar map of the system.
I am using test cases provided with the MatPower distribution. How easy or
tough would it be to get a planar map of your test cases? Is the bus and the
line data listed in a systematic manner?
Thanks,
Shri
carlos.
Shri wrote:
On Aug 15, 2012, at 9:03 PM, Carlos E Murillo-Sanchez wrote:
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.
Thanks for your comments Carlos. Any tips on how to go about connecting test
cases in an engineered way rather than just naively putting in random lines?
If anyone has larger test cases (> 3375 buses) (not neccessarily MatPower
format) and willing to share it, I would really love that :)
Thanks,
Shri
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
