Hi,

I've just written saturday about my problem:



"Dear all,


I'm working on my thesis using MATPOWER, but  I' ve this problem with MOST tool:


Error using  .*
Matrix dimensions must agree.

Error in most (line 2116)
        mpc.gen(ivl, QG) = mpc.gen(ivl, PG) .* Qlim ./ Pmin(ivl);

In particular:

Qlim =

     []

mpc.gen(ivl, PG)

ans =

   Empty matrix: 0-by-1."


After I've read more documentation about MATPOWER and MOST tool, I understand 
that the OPF solution required to find the min f(x) with a constraint of cost.
I've a case without gencost and I prefer to not create a gencost matrix to 
solve it because the cost of PG don't matter in my case.
It's possible to impose that MATPOWER doesn't study the cost of PG during the 
solution process? In other words, is there a MATPOWER option to leave the cost 
constraint?


Thanks a lot for your contribution


Regards



ALBERTO CLAUDIO ALVISI

Student at University Of Bologna



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