Dear Dr Zimmerman,
In our class, the followings were mentioned for the ACOPF, and I would like to 
verify with you:
-> in the mpc.bus matrix, the columns:    'area', and 'zone' : not taken into 
account. Thus we can let them have a value of '1'.    'basekV'               : 
not taken into account. The results are shown in per unit after all.      'Vm' 
and 'Va'       : not taken into account. Thus we can let them have a value of 
'1' and '0' respectively.
->in the mpc.gen matrix, the column:    'Vg'                      : not taken 
into account. Thus we can let it have a value of '1'.     -> in the mpc.branch 
matrix, the columns:     'ratio', and 'angle': not taken into account. Thus we 
can let them both have a value of '0'.    'rateA'                   : if we 
want no line constraints, we can give it a large value e.g. '99999'    'rateB', 
and 'rateC' : not taken into account. We can let them '0' (normal operation).
Do you agree?
Thank youSyros                                    

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