Dear Dr. Zimmerman,

I want to add additional constraints on only regular generators but not on 
"Dummy" generators that created by DC line modeling. However, I got problem of 
A matrix dimensions: 

Error using opf_model/add_constraints (line 102)
@opf_model/add_constraints: number of columns of A does not match
number of variables, A is 3174 x 3312, nv = 3888

The difference of 3888 - 3312 = 576 is exactly the number of "Dummy" generators 
created by DC line modeling. But I don't want to add constraints to those 
generators. I'm thinking of adding zeros, '-Inf' and 'Inf' to A, l and u vector 
respectively. I'm worried about this would affect the convergence or 
computation time. Do you have any better suggestions on solving this? Thanks,

Zhouxing Hu
                                          

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