For a dispatchable load with a positive reactive load, QMIN and PMIN are used 
to compute the constant power factor constraint. QG and PG must also be 
consistent with this power factor. If you adjust any of these 4 parameters, you 
must adjust the others to ensure that QMIN/PMIN = QG/PG. If the load has a 
negative reactive load (injection), then QMAX is the parameter used instead of 
QMIN.

-- 
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645



On Mar 4, 2011, at 9:49 AM, Carlos Gonzalez Almeida wrote:

> Hello
> 
> How can I change power factor of dispatchable loads (changing reactive power 
> ) in MATPOWER? I cannot change. there is an error
> 
> 
> Regards
> 
> 
> 
> 



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