When the OPF does not converge, the results should be disregarded since they do
not represent a valid solution. The only reason they are returned at all is
that it can sometimes be useful to know where the solver was when it gave up.
Ray
On Dec 8, 2020, at 1:54 AM, KHALDON AHMED QAID AL-AREQI
<[email protected]<mailto:[email protected]>> wrote:
Dear Dr. Ray D. Zimmerman
Thanks for this creative tool.
I am new using MATPOWER, am not sure if I do it correctly here. I am trying to
do load shedding scenarios using load2dis() in OPF for case9. In each scenario,
there are generators out of the service. For example, the first scenario is
assuming one generator off and the second scenario is assuming two generators
off. However, in scenario three when three generators out of the service, which
means it does not converge, I can still see in the results.gen 50% of the load
is connected to the system with no generators power MW. I expected that when
the generators are zero, all the connected load should be zero moves to load
shedding.
The code I used is
clear;
define_constants;
mpopt = mpoption('out.all', 1, 'verbose', 0);
mpopt=mpoption(mpopt,'opf.ac.solver', 'FMINCON');
mpc=loadcase('case9');
mpc = load2disp(mpc);
mpc.gen([1 2 3],GEN_STATUS)=0;
results=runopf(mpc,mpopt);
LoadShed=results.gen([4 5 6], PG)
ConnectedLoad = total_load(results)
The results I get are
>>>>> Did NOT converge (0.03 seconds) <<<<<
LoadShed =
-35.9692675358089
-40.0191108315373
-50.0298559599331
ConnectedLoad =
126.018234327279
Am not sure if the code correct or am I taking the load shedding results data
from the wrong place.
Thank you , any help is appreciated
Khaldon Qaid
