>From the last paragraph on page 35 in the manual ...

With an AC network model, there is also the question of reactive dispatch for 
such loads. Typically the reactive injection for a generator is allowed to take 
on any value within its defined limits. Since this is not normal load behavior, 
the model used in MATPOWER assumes that dispatchable loads maintain a constant 
power factor. When formulating the AC OPF problem, MATPOWER will automatically 
generate an additional equality constraint to enforce a constant power factor 
for any “negative generator” being used to model a dispatchable load.

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



On Jun 8, 2011, at 6:43 AM, Waqquas Bukhsh wrote:

> Hi,
> I have a question regarding the load shedding implementation in Matpower.
> 
> Equal proportion of real to reactive load is shed when implementing load 
> shedding using load2disp.m
> Is there any thing which I have missed in the code which dictates the 
> optimization to shed load in equal proportions?
> 
> Thanks,
> Waqquas

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