can I only relax branch capacity constraints in DCOPF, but not generators' capacities

[yanda1234]

Dear Dr. Zimmerman,

I am curious if I can only relax branch capacity constraints, but not generators' capacities. Is there anyway to do that?
Toggle_softlims(MPC, "on") will relax both of them together...

Best,
Yanda

[rdzman]

There is a lot of flexibility in which constraints to relax and how. Please see Section 7.6.4 in the MATPOWER User's Manual for all of the details.

To relax only branch limits, set opf.softlims.default option to 0 and mpc.softlims.RATE A = struct().

[rdzman]

I'm not sure. My best guess is it probably means you have a VMAX entry (with invalid content) in the softlims field of your case struct. Try changing the second line in the loop from ...

temp_case.softlims.RATE_A=struct();

... to ...

temp_case.softlims = struct('RATE_A', struct());

That should make sure you there aren't any other soft limits besides the branch flow constraints.

[yanda1234]

Thanks, Dr. Zimmerman!